:root {
  --color-bg: #0a0b0e;
  --color-bg-alt: #101216;
  --color-surface: #16181d;
  --color-surface-alt: #1c1f26;
  --color-text: #e7e9ee;
  --color-text-muted: #9aa1ad;
  --color-text-soft: #6b7280;
  --color-border: rgba(255, 255, 255, 0.09);
  --color-border-soft: rgba(255, 255, 255, 0.05);
  --color-ink: #f5f6f8;

  --color-programador: #4d9fff;
  --color-programador-dark: #2f6fcf;
  --color-programador-light: #8cc4ff;
  --color-programador-soft: rgba(77, 159, 255, 0.14);
  --color-programador-rgb: 77, 159, 255;

  --color-operador: #ff9d4d;
  --color-operador-dark: #cc7a2e;
  --color-operador-light: #ffc98a;
  --color-operador-soft: rgba(255, 157, 77, 0.14);
  --color-operador-rgb: 255, 157, 77;

  --color-success: #34d399;
  --color-success-soft: rgba(52, 211, 153, 0.14);
  --color-success-rgb: 52, 211, 153;

  --color-danger: #f87171;
  --color-danger-soft: rgba(248, 113, 113, 0.14);
  --color-danger-rgb: 248, 113, 113;

  --color-warning: #fbbf24;
  --color-warning-soft: rgba(251, 191, 36, 0.14);
  --color-warning-rgb: 251, 191, 36;

  --color-violet: #c084fc;
  --color-violet-soft: rgba(192, 132, 252, 0.14);
  --color-violet-rgb: 192, 132, 252;

  --color-accent: #c8f542;
  --color-accent-dark: #8fb800;
  --color-accent-ink: #1c2400;
  --color-accent-rgb: 200, 245, 66;

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-pill: 999px;

  --space-xs: 0.4rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3.25rem;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.4), 0 2px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.5), 0 6px 16px rgba(0, 0, 0, 0.35);
  --shadow-glow-programador: 0 0 0 3px rgba(var(--color-programador-rgb), 0.22);
  --shadow-glow-operador: 0 0 0 3px rgba(var(--color-operador-rgb), 0.22);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 120ms;
  --duration-base: 220ms;
  --duration-slow: 420ms;

  --font-sans: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: "Space Grotesk", "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "Cascadia Code", "Fira Code", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  color-scheme: dark;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  font-family: var(--font-sans);
  color: var(--color-text);
  line-height: 1.5;
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    var(--color-bg);
  background-size: 40px 40px, 40px 40px, 100%;
  background-attachment: fixed;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--color-ink);
}

a {
  color: var(--color-programador);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

a:hover {
  color: var(--color-programador-light);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* --- Header --- */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  padding: 0.85rem 1.5rem;
  background: rgba(16, 18, 22, 0.85);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 0.75rem;
}

.site-header .brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: #fff;
  font-size: 1.05rem;
}

.brand-mark {
  display: inline-flex;
  width: 1.9rem;
  height: 1.9rem;
}

.brand-mark svg {
  width: 100%;
  height: 100%;
}

.brand-mark rect {
  fill: var(--color-programador);
}

.brand-text {
  position: relative;
}

.brand-text::after {
  content: "";
  position: absolute;
  left: 0;
  right: -0.5rem;
  bottom: -5px;
  height: 3px;
  background: var(--color-accent);
  border-radius: 2px;
}

.site-header nav a {
  color: #cfd6e0;
  font-weight: 500;
  font-size: 0.92rem;
  white-space: nowrap;
}

.site-header nav a:hover {
  color: #fff;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
}

/* --- Cards --- */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out);
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: var(--shadow-md);
}

.card--track-programador {
  border-top: 4px solid var(--color-programador);
}

.card--track-operador {
  border-top: 4px solid var(--color-operador);
}

/* --- Icon system (inline SVG) --- */

.icon {
  width: 1em;
  height: 1em;
  display: inline-block;
  vertical-align: -0.14em;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: var(--radius-md);
  margin-bottom: 0.6rem;
  flex-shrink: 0;
  border: 1px solid var(--color-border);
}

.icon-badge .icon {
  width: 1.3rem;
  height: 1.3rem;
}

.icon-badge--programador {
  background: var(--color-programador-soft);
  color: var(--color-programador);
  border-color: rgba(var(--color-programador-rgb), 0.3);
}

.icon-badge--operador {
  background: var(--color-operador-soft);
  color: var(--color-operador);
  border-color: rgba(var(--color-operador-rgb), 0.3);
}

.icon-badge--neutro {
  background: var(--color-surface-alt);
  color: var(--color-text-muted);
}

/* --- Ambient background blobs (decorative, contained) --- */

.bg-blobs {
  position: relative;
  overflow-x: hidden;
}

.bg-blobs::before,
.bg-blobs::after {
  content: "";
  position: absolute;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.07;
  pointer-events: none;
  z-index: 0;
}

.bg-blobs::before {
  top: -120px;
  left: -100px;
  background: var(--color-programador);
}

.bg-blobs::after {
  bottom: -140px;
  right: -100px;
  background: var(--color-operador);
}

.bg-blobs > * {
  position: relative;
  z-index: 1;
}

/* --- Buttons --- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.95rem;
  transition: transform var(--duration-fast) var(--ease-spring),
    box-shadow var(--duration-base) var(--ease-out),
    background var(--duration-base) var(--ease-out),
    color var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--color-ink);
  color: var(--color-bg);
}

.btn-primary:hover {
  background: #ffffff;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.4);
}

.btn-outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-outline:hover {
  background: var(--color-surface-alt);
  border-color: var(--color-text-soft);
  color: var(--color-ink);
}

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}

.btn-danger:hover {
  background: #8f1e18;
  color: #fff;
  box-shadow: 0 6px 16px rgba(179, 38, 30, 0.28);
}

.btn-sm {
  padding: 0.4rem 0.9rem;
  font-size: 0.85rem;
}

.btn-outline-danger {
  background: transparent;
  border-color: rgba(var(--color-danger-rgb), 0.35);
  color: var(--color-danger);
}

.btn-outline-danger:hover {
  background: var(--color-danger-soft);
  border-color: var(--color-danger);
  color: var(--color-danger);
}

.btn-outline-danger:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

/* --- Hero / Landing --- */

.hero {
  text-align: center;
  padding: var(--space-xl) 1.25rem;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at var(--mx, 20%) var(--my, 10%), rgba(var(--color-programador-rgb), 0.12), transparent 45%),
    radial-gradient(circle at 85% 20%, rgba(var(--color-operador-rgb), 0.1), transparent 45%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse at center, #000 0%, transparent 75%);
  pointer-events: none;
}

.hero > * {
  position: relative;
}

.hero .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-accent);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 0.3rem 0.9rem;
  border-radius: var(--radius-pill);
  margin-bottom: 1.25rem;
}

.hero .eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent);
}

.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  margin-bottom: 0.75rem;
  color: var(--color-ink);
}

.hero p {
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto 2rem;
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Track showcase (landing) --- */

.track-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto var(--space-lg);
  padding: 0 1.25rem;
}

@media (max-width: 640px) {
  .track-showcase {
    grid-template-columns: 1fr;
  }
}

.track-panel {
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  color: #fff;
  text-align: left;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
  transition: transform var(--duration-base) var(--ease-spring), box-shadow var(--duration-base) var(--ease-out);
}

.track-panel::after {
  content: "";
  position: absolute;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  top: -60px;
  right: -60px;
}

.track-panel:hover {
  transform: translateY(-6px) scale(1.015);
  box-shadow: var(--shadow-lg), 0 18px 34px rgba(16, 19, 26, 0.18);
}

.track-panel--programador {
  background: linear-gradient(150deg, var(--color-programador) 0%, var(--color-programador-dark) 100%);
}

.track-panel--operador {
  background: linear-gradient(150deg, var(--color-operador) 0%, var(--color-operador-dark) 100%);
  margin-top: 1.5rem;
}

.track-panel .track-icon {
  width: 2.6rem;
  height: 2.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.16);
  margin-bottom: 0.9rem;
  position: relative;
}

.track-panel .track-icon .icon {
  width: 1.5rem;
  height: 1.5rem;
}

@media (max-width: 640px) {
  .track-panel--operador {
    margin-top: 0;
  }
}

.track-panel h3 {
  color: #fff;
  margin: 0 0 0.4rem;
  font-size: 1.25rem;
}

.track-panel p {
  color: rgba(255, 255, 255, 0.88);
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.55;
}

/* --- Scroll reveal --- */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--duration-slow) var(--ease-out), transform var(--duration-slow) var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* --- Forms --- */

.form-field {
  margin-bottom: 1.1rem;
}

.form-field label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  background: var(--color-surface-alt);
  color: var(--color-text);
  color-scheme: dark;
  transition: border-color var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out);
}

.form-field input:hover,
.form-field select:hover,
.form-field textarea:hover {
  border-color: var(--color-text-soft);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-programador);
  box-shadow: var(--shadow-glow-programador);
}

.form-field textarea {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  resize: vertical;
}

.form-hint {
  color: var(--color-text-muted);
  font-size: 0.82rem;
  margin: 0.35rem 0 0;
}

.form-errors,
.field-errors {
  color: var(--color-danger);
  font-size: 0.85rem;
  margin-top: 0.3rem;
  animation: fade-in-up var(--duration-base) var(--ease-out);
}

.form-section-title {
  margin: 1.75rem 0 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border-soft);
  color: var(--color-ink);
  font-size: 1rem;
}

.form-section-title:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.form-section-title small {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.8rem;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 1.25rem;
}

.form-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.form-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

@media (max-width: 640px) {
  .form-grid,
  .form-grid--3 {
    grid-template-columns: 1fr;
  }
}

/* --- Curso selector --- */

.curso-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

@media (max-width: 560px) {
  .curso-selector {
    grid-template-columns: 1fr;
  }
}

.curso-card {
  position: relative;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  cursor: pointer;
  transition: border-color var(--duration-base) var(--ease-out),
    background var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out),
    transform var(--duration-fast) var(--ease-spring);
  overflow: hidden;
}

.curso-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.curso-card input {
  position: absolute;
  opacity: 0;
  inset: 0;
  cursor: pointer;
}

.curso-card::after {
  content: "✓";
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: #fff;
  transform: scale(0);
  opacity: 0;
  transition: transform var(--duration-base) var(--ease-spring), opacity var(--duration-fast) var(--ease-out);
}

.curso-card .curso-icon {
  width: 2.2rem;
  height: 2.2rem;
  margin-bottom: 0.6rem;
  display: block;
}

.curso-card .curso-icon .icon {
  width: 100%;
  height: 100%;
}

.curso-card .curso-title {
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.curso-card .curso-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.curso-card--programador .curso-icon {
  color: var(--color-programador);
}

.curso-card--operador .curso-icon {
  color: var(--color-operador);
}

.curso-card--programador::after {
  background: var(--color-programador);
}

.curso-card--operador::after {
  background: var(--color-operador);
}

.curso-card--programador:has(input:checked) {
  border-color: var(--color-programador);
  background: var(--color-programador-soft);
  box-shadow: var(--shadow-glow-programador);
}

.curso-card--operador:has(input:checked) {
  border-color: var(--color-operador);
  background: var(--color-operador-soft);
  box-shadow: var(--shadow-glow-operador);
}

.curso-card:has(input:checked)::after {
  transform: scale(1);
  opacity: 1;
}

/* --- Auth split layout --- */

.auth-split {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  min-height: calc(100vh - 64px);
  overflow-x: hidden;
}

.auth-split__brand {
  position: relative;
  overflow: hidden;
  padding: 3rem 2.5rem;
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--color-bg-alt);
  border-right: 1px solid var(--color-border);
}

.auth-split__brand::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(ellipse at 20% 30%, #000 0%, transparent 65%);
}

.auth-split__brand::after {
  content: "";
  position: absolute;
  width: 220px;
  height: 220px;
  top: -60px;
  left: -60px;
  background: var(--color-programador);
  opacity: 0.16;
  border-radius: 50%;
  filter: blur(70px);
}

.auth-split__brand > * {
  position: relative;
}

.auth-split__brand h2 {
  color: var(--color-ink);
  font-size: 1.6rem;
  margin-bottom: 0.75rem;
}

.auth-split__brand p {
  color: var(--color-text-muted);
  max-width: 380px;
  line-height: 1.6;
}

.auth-split__form {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 1.25rem;
}

.auth-split__form .card {
  width: 100%;
  max-width: 460px;
}

@media (max-width: 780px) {
  .auth-split {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .auth-split__brand {
    padding: 2.25rem 1.5rem;
    text-align: center;
    align-items: center;
  }

  .auth-split__brand p {
    max-width: none;
  }
}

/* --- Status pages --- */

.status-page {
  text-align: center;
  padding: 3rem 1.25rem;
}

.status-badge {
  display: inline-block;
  padding: 0.3rem 0.9rem;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 1rem;
}

.status-badge--pendiente {
  background: var(--color-warning-soft);
  color: var(--color-warning);
}

.status-badge--rechazado {
  background: var(--color-danger-soft);
  color: var(--color-danger);
}

.status-badge--activo {
  background: var(--color-success-soft);
  color: var(--color-success);
}

.status-badge--suspendido {
  background: var(--color-violet-soft);
  color: var(--color-violet);
}

.status-badge--admin {
  background: var(--color-ink);
  color: var(--color-bg);
}

.status-badge--alumno {
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
}

/* --- Stat grid --- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0 2rem;
}

.stat-card {
  text-align: center;
  position: relative;
  overflow: hidden;
  border-top: 3px solid var(--color-border);
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.stat-grid .stat-card {
  animation: fade-in-up var(--duration-slow) var(--ease-out) both;
}

.stat-grid .stat-card:nth-child(2) { animation-delay: 60ms; }
.stat-grid .stat-card:nth-child(3) { animation-delay: 120ms; }
.stat-grid .stat-card:nth-child(4) { animation-delay: 180ms; }

.stat-card .stat-icon {
  width: 1.6rem;
  height: 1.6rem;
  display: block;
  margin: 0 auto 0.5rem;
  color: var(--color-text-soft);
}

.stat-card .stat-icon .icon {
  width: 100%;
  height: 100%;
}

.stat-card--pendientes .stat-icon { color: var(--color-warning); }
.stat-card--programador .stat-icon { color: var(--color-programador); }
.stat-card--operador .stat-icon { color: var(--color-operador); }
.stat-card--suspendidos .stat-icon { color: var(--color-violet); }
.stat-card--progreso .stat-icon { color: var(--color-success); }

/* --- Progress bars (dashboard) --- */

.progress-bar {
  width: 100%;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-border-soft);
  overflow: hidden;
  margin-top: 0.5rem;
}

.progress-bar__fill {
  height: 100%;
  border-radius: var(--radius-pill);
  transition: width var(--duration-slow) var(--ease-out);
}

.progress-bar__fill--programador {
  background: linear-gradient(90deg, var(--color-programador-light), var(--color-programador));
}

.progress-bar__fill--operador {
  background: linear-gradient(90deg, var(--color-operador-light), var(--color-operador));
}

.progress-bar__fill--success {
  background: linear-gradient(90deg, #52c77e, var(--color-success));
}

/* --- Dashboard header banner --- */

.dashboard-banner {
  border-radius: var(--radius-xl);
  padding: 1.75rem 2rem;
  color: var(--color-text);
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-programador);
  margin-bottom: 1.75rem;
}

.dashboard-banner--operador {
  border-left-color: var(--color-operador);
}

.dashboard-banner h1 {
  color: var(--color-ink);
  margin: 0 0 0.25rem;
}

.dashboard-banner p {
  color: var(--color-text-muted);
  margin: 0;
}

.stat-card .stat-value {
  font-size: 2.1rem;
  font-weight: 800;
  display: block;
  color: var(--color-ink);
}

.stat-card .stat-label {
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

/* --- Wide container (dashboard / content-heavy pages) --- */

.container--wide {
  max-width: 1180px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.dashboard-banner__inner {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.dashboard-banner__badge {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-programador);
}

.dashboard-banner--operador .dashboard-banner__badge {
  color: var(--color-operador);
}

.dashboard-banner__badge .icon {
  width: 1.5rem;
  height: 1.5rem;
}

.dashboard-banner h1 {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
}

/* --- Section heading (dashboard, panel pages) --- */

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin: 2.25rem 0 1rem;
}

.section-heading h2 {
  font-size: 1.2rem;
  margin: 0;
}

.section-heading p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin: 0;
}

/* --- Action tiles (dashboard shortcuts) --- */

.action-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.action-tile {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  position: relative;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: border-color var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out);
}

.action-tile:hover {
  box-shadow: var(--shadow-md);
}

.action-tile--programador:hover {
  border-color: var(--color-programador);
}

.action-tile--operador:hover {
  border-color: var(--color-operador);
}

.action-tile__body {
  flex: 1;
}

.action-tile__body h3 {
  margin: 0 0 0.2rem;
  font-size: 1.05rem;
}

.action-tile__body p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

.action-tile__arrow {
  color: var(--color-text-soft);
  transition: transform var(--duration-base) var(--ease-out);
}

.action-tile:hover .action-tile__arrow {
  transform: translateX(4px);
  color: inherit;
}

.stat-card--pendientes { border-top-color: var(--color-warning); }
.stat-card--programador { border-top-color: var(--color-programador); }
.stat-card--operador { border-top-color: var(--color-operador); }
.stat-card--suspendidos { border-top-color: var(--color-violet); }
.stat-card--progreso { border-top-color: var(--color-success); }

/* --- Admin panel --- */

.panel-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.table-scroll {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table .status-badge {
  margin-bottom: 0;
}

.data-table td.mono {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.data-table th,
.data-table td {
  text-align: left;
  padding: 0.75rem 0.6rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.92rem;
}

.data-table th {
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.data-table tbody tr {
  transition: background var(--duration-fast) var(--ease-out);
}

.data-table tbody tr:hover {
  background: var(--color-bg-alt);
}

.data-table tbody tr {
  animation: fade-in-up var(--duration-fast) var(--ease-out) both;
}

.data-table tbody tr:nth-child(2) { animation-delay: 25ms; }
.data-table tbody tr:nth-child(3) { animation-delay: 50ms; }
.data-table tbody tr:nth-child(4) { animation-delay: 75ms; }
.data-table tbody tr:nth-child(n+5) { animation-delay: 100ms; }

.row-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.user-identity {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.user-avatar {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  font-weight: 800;
  font-size: 0.85rem;
}

.user-avatar--admin { background: var(--color-ink); color: var(--color-bg); }
.user-avatar--alumno { background: var(--color-surface-alt); color: var(--color-text-muted); }

.user-identity__text { display: grid; min-width: 0; }
.user-identity__text strong { overflow: hidden; color: var(--color-ink); text-overflow: ellipsis; white-space: nowrap; max-width: 14rem; }
.user-identity__text small { overflow: hidden; color: var(--color-text-muted); text-overflow: ellipsis; white-space: nowrap; max-width: 14rem; font-size: 0.78rem; }

.course-tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  font-size: 0.76rem;
  font-weight: 700;
  white-space: nowrap;
}

.course-tag--programador { color: var(--color-programador); background: var(--color-programador-soft); }
.course-tag--operador { color: var(--color-operador); background: var(--color-operador-soft); }

.user-date {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  white-space: nowrap;
}

.role-form {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.role-select {
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface-alt);
  color: var(--color-text);
  font-size: 0.82rem;
}

.row-actions form {
  display: inline-flex;
  gap: 0.4rem;
  align-items: center;
}

.motivo-input {
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  background: var(--color-surface-alt);
  color: var(--color-text);
}

.motivo-input::placeholder {
  color: var(--color-text-soft);
}

.empty-state {
  color: var(--color-text-muted);
  padding: 1.5rem 0;
}

/* --- Exercise list (admin) --- */

.page-lead {
  margin: -0.5rem 0 1.5rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.exercise-list {
  display: grid;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.exercise-card {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  transition: border-color var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out), transform var(--duration-fast) var(--ease-out);
  animation: fade-in-up var(--duration-fast) var(--ease-out) both;
}

.exercise-card:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.exercise-card--programador { border-left-color: var(--color-programador); }
.exercise-card--operador { border-left-color: var(--color-operador); }

.exercise-card__type {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.exercise-card__type .icon { width: 1.3rem; height: 1.3rem; }

.exercise-type--quiz { background: var(--color-violet-soft); color: var(--color-violet); border-color: rgba(var(--color-violet-rgb), 0.3); }
.exercise-type--codigo { background: var(--color-programador-soft); color: var(--color-programador); border-color: rgba(var(--color-programador-rgb), 0.3); }
.exercise-type--canvas { background: var(--color-warning-soft); color: var(--color-warning); border-color: rgba(var(--color-warning-rgb), 0.3); }
.exercise-type--actividad { background: var(--color-success-soft); color: var(--color-success); border-color: rgba(var(--color-success-rgb), 0.3); }

.exercise-card__body { flex: 1; min-width: 0; }

.exercise-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.exercise-badge {
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 700;
  white-space: nowrap;
}

.exercise-badge--programador { color: var(--color-programador); background: var(--color-programador-soft); }
.exercise-badge--operador { color: var(--color-operador); background: var(--color-operador-soft); }

.exercise-badge--tipo.exercise-type--quiz { color: var(--color-violet); background: var(--color-violet-soft); }
.exercise-badge--tipo.exercise-type--codigo { color: var(--color-programador); background: var(--color-programador-soft); }
.exercise-badge--tipo.exercise-type--canvas { color: var(--color-warning); background: var(--color-warning-soft); }
.exercise-badge--tipo.exercise-type--actividad { color: var(--color-success); background: var(--color-success-soft); }

.exercise-order {
  color: var(--color-text-soft);
  font-size: 0.78rem;
  font-family: var(--font-mono);
}

.exercise-modulo {
  color: var(--color-text-muted);
  font-size: 0.78rem;
}

.exercise-modulo::before { content: "· "; }

.exercise-card__title {
  margin: 0;
  overflow: hidden;
  color: var(--color-text);
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.98rem;
}

.exercise-card__actions {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.5rem;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.3rem;
  height: 2.3rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out);
}

.icon-btn .icon { width: 1.1rem; height: 1.1rem; }

.icon-btn:hover {
  background: var(--color-surface-alt);
  color: var(--color-ink);
  border-color: var(--color-text-soft);
}

.icon-btn--sm {
  width: 1.9rem;
  height: 1.9rem;
}

.icon-btn--sm .icon { width: 0.95rem; height: 0.95rem; }

.icon-btn--danger:hover {
  background: var(--color-danger-soft);
  color: var(--color-danger);
  border-color: rgba(var(--color-danger-rgb), 0.35);
}

@media (max-width: 720px) {
  .exercise-card { flex-wrap: wrap; }
  .exercise-card__body { flex-basis: 100%; order: 2; }
  .exercise-card__actions { order: 3; flex-basis: 100%; justify-content: flex-start; margin-top: 0.25rem; }
  .exercise-card__title { white-space: normal; }
}

/* Row approve/reject transition — fade + collapse */

.row-result {
  animation: row-flash var(--duration-slow) var(--ease-out);
}

.row-result--aprobado td {
  color: var(--color-success);
  font-weight: 600;
}

.row-result--rechazado td {
  color: var(--color-danger);
  font-weight: 600;
}

@keyframes row-flash {
  from {
    background: var(--color-bg-alt);
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    background: transparent;
    opacity: 1;
    transform: none;
  }
}

tr.htmx-swapping {
  opacity: 0;
  transform: scale(0.98);
  transition: opacity var(--duration-base) var(--ease-out), transform var(--duration-base) var(--ease-out);
}

/* --- HTMX request feedback --- */

.htmx-request,
.htmx-request * {
  cursor: progress;
}

button.htmx-request {
  opacity: 0.7;
  pointer-events: none;
}

/* --- Módulos de teoría --- */

.modulo-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.modulo-card {
  display: block;
  color: inherit;
  transition: border-color var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out);
}

.modulo-card:hover {
  border-color: var(--color-programador);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px) scale(1.01);
}

.modulo-list .modulo-card {
  animation: fade-in-up var(--duration-base) var(--ease-out) both;
}

.modulo-list .modulo-card:nth-child(2) { animation-delay: 40ms; }
.modulo-list .modulo-card:nth-child(3) { animation-delay: 80ms; }
.modulo-list .modulo-card:nth-child(4) { animation-delay: 120ms; }
.modulo-list .modulo-card:nth-child(5) { animation-delay: 160ms; }
.modulo-list .modulo-card:nth-child(n+6) { animation-delay: 200ms; }

.modulo-card h2 {
  margin: 0.35rem 0 0;
  font-size: 1.1rem;
}

.modulo-card__orden {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.modulo-contenido {
  margin-top: 1.25rem;
  line-height: 1.75;
  font-size: 1.02rem;
}

.modulo-contenido h1,
.modulo-contenido h2,
.modulo-contenido h3 {
  line-height: 1.3;
  margin-top: 1.75rem;
}

.modulo-contenido pre {
  overflow-x: auto;
  padding: 1rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.modulo-contenido code {
  font-family: var(--font-mono);
  font-size: 0.88em;
}

/* --- Callouts (admonitions) --- */

.callout {
  border-left: 4px solid;
  border-radius: var(--radius-md);
  padding: 0.9rem 1.1rem;
  margin: 1.25rem 0;
  box-shadow: var(--shadow-sm);
}

.callout p {
  margin: 0.3rem 0;
}

.callout__title {
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.callout--verde {
  background: var(--color-success-soft);
  border-color: var(--color-success);
}
.callout--verde .callout__title {
  color: var(--color-success);
}

.callout--azul {
  background: var(--color-programador-soft);
  border-color: var(--color-programador);
}
.callout--azul .callout__title {
  color: var(--color-programador);
}

.callout--naranja {
  background: var(--color-operador-soft);
  border-color: var(--color-operador);
}
.callout--naranja .callout__title {
  color: var(--color-operador);
}

.callout--rojo {
  background: var(--color-danger-soft);
  border-color: var(--color-danger);
}
.callout--rojo .callout__title {
  color: var(--color-danger);
}

.callout--violeta {
  background: var(--color-violet-soft);
  border-color: var(--color-violet);
}
.callout--violeta .callout__title {
  color: var(--color-violet);
}

/* --- Ejercicios --- */

.tipo-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.5rem;
}

.tipo-badge--quiz {
  background: var(--color-programador-soft);
  color: var(--color-programador);
}

.tipo-badge--codigo {
  background: var(--color-success-soft);
  color: var(--color-success);
}

.tipo-badge--canvas {
  background: var(--color-operador-soft);
  color: var(--color-operador);
}

.ejercicio-estado {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin: 0.4rem 0 0;
}

.ejercicio-enunciado {
  margin-top: 1rem;
  margin-bottom: 1.25rem;
  line-height: 1.7;
}

.quiz-pregunta {
  border: none;
  border-top: 1px solid var(--color-border);
  padding: 1rem 0;
  margin: 0;
}

.quiz-pregunta:first-child {
  border-top: none;
  padding-top: 0;
}

.quiz-pregunta__texto {
  font-weight: 600;
  margin-bottom: 0.6rem;
}

.quiz-opcion-label {
  display: block;
  padding: 0.55rem 0.7rem;
  cursor: pointer;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: background var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
}

.quiz-opcion-label:hover {
  background: var(--color-bg-alt);
  border-color: var(--color-border);
}

.quiz-opcion-label:has(input:checked) {
  background: var(--color-programador-soft);
  border-color: var(--color-programador);
  font-weight: 600;
}

.quiz-opciones {
  list-style: none;
  padding: 0;
  margin: 0 0 0.6rem;
}

.quiz-opciones li {
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-md);
}

.quiz-opcion--correcta {
  background: var(--color-success-soft);
  font-weight: 600;
}

.quiz-opcion--elegida-incorrecta {
  background: var(--color-danger-soft);
}

.quiz-pregunta--correcta {
  border-left: 3px solid var(--color-success);
  padding-left: 0.75rem;
  animation: feedback-in var(--duration-slow) var(--ease-out) both;
}

.quiz-pregunta--incorrecta {
  border-left: 3px solid var(--color-danger);
  padding-left: 0.75rem;
  animation: feedback-in var(--duration-slow) var(--ease-out) both;
}

.quiz-resultado .quiz-pregunta:nth-child(2) { animation-delay: 40ms; }
.quiz-resultado .quiz-pregunta:nth-child(3) { animation-delay: 80ms; }
.quiz-resultado .quiz-pregunta:nth-child(4) { animation-delay: 120ms; }
.quiz-resultado .quiz-pregunta:nth-child(5) { animation-delay: 160ms; }
.quiz-resultado .quiz-pregunta:nth-child(n+6) { animation-delay: 200ms; }

@keyframes feedback-in {
  from {
    opacity: 0;
    transform: translateX(-8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.quiz-feedback {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.quiz-resultado h2 {
  margin-top: 0;
}

.codigo-bloque {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  overflow-x: auto;
  white-space: pre-wrap;
}

.canvas-toolbar {
  margin-bottom: 0.75rem;
  display: flex;
  gap: 0.5rem;
}

.ejercicio-canvas {
  display: block;
  width: 100%;
  max-width: 800px;
  height: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: crosshair;
  touch-action: none;
  margin-bottom: 1rem;
  background: #fff;
  box-shadow: var(--shadow-sm);
}

/* --- Shared keyframes --- */

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* --- Reduced motion --- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .track-panel:hover,
  .card:hover,
  .modulo-card:hover,
  .stat-card:hover,
  .curso-card:hover {
    transform: none;
  }
}

/* --- Player shell (teoría detalle: sidebar + content, LMS-style) --- */

.player-shell {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 860px) {
  .player-shell {
    grid-template-columns: 1fr;
  }
}

.player-sidebar {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 0.75rem;
  position: sticky;
  top: 5.5rem;
  max-height: calc(100vh - 7rem);
  overflow-y: auto;
}

.player-sidebar__title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-soft);
  padding: 0.5rem 0.6rem 0.75rem;
}

.player-module {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.65rem 0.6rem;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: 0.92rem;
  transition: background var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);
}

.player-module:hover {
  background: var(--color-surface-alt);
  color: var(--color-text);
}

.player-module__dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--color-text-soft);
}

.player-module.is-active {
  background: var(--color-programador-soft);
  color: var(--color-ink);
  font-weight: 600;
}

.player-module.is-active .player-module__dot {
  border-color: var(--color-programador);
  color: var(--color-programador);
}

.player-shell--operador .player-module.is-active {
  background: var(--color-operador-soft);
}

.player-shell--operador .player-module.is-active .player-module__dot {
  border-color: var(--color-operador);
  color: var(--color-operador);
}

.player-content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.crumb-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-programador);
  background: var(--color-programador-soft);
  border: 1px solid rgba(var(--color-programador-rgb), 0.3);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-pill);
  margin-bottom: 1rem;
}

.player-shell--operador .crumb-pill,
.crumb-pill--operador {
  color: var(--color-operador);
  background: var(--color-operador-soft);
  border-color: rgba(var(--color-operador-rgb), 0.3);
}

.crumb-pill--programador {
  color: var(--color-programador);
  background: var(--color-programador-soft);
  border-color: rgba(var(--color-programador-rgb), 0.3);
}

.crumb-pill--neutro {
  color: var(--color-text-muted);
  background: var(--color-surface-alt);
  border-color: var(--color-border);
}

/* --- Back link (breadcrumb-style, Coderhouse-inspired) --- */

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
}

.back-link:hover {
  color: var(--color-text);
}

.back-link .icon {
  width: 0.9rem;
  height: 0.9rem;
}

/* --- Segmented pill tabs (filter-bar) --- */

.filter-bar {
  display: inline-flex;
  gap: 0.2rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 0.25rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.filter-bar a {
  padding: 0.4rem 1rem;
  border-radius: var(--radius-pill);
  border: none;
  color: var(--color-text-muted);
  font-size: 0.88rem;
  font-weight: 500;
  transition: background var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);
}

.filter-bar a:hover {
  color: var(--color-text);
}

.filter-bar a.active {
  background: var(--color-ink);
  color: var(--color-bg);
  font-weight: 600;
}

.player-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.player-footer__progress {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 140px;
}

.player-footer__progress .progress-bar {
  flex: 1;
  margin-top: 0;
}

.player-footer__progress span {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}



/* --- Students admin page --- */
.admin-page-hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: 1rem 0 1.25rem;
  padding: 1.6rem 1.75rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at top left, rgba(var(--color-programador-rgb), 0.22), transparent 34%),
    linear-gradient(135deg, rgba(18, 24, 38, 0.98), rgba(26, 38, 58, 0.96));
  box-shadow: var(--shadow-md);
}

.admin-page-hero h1 { margin: 0.75rem 0 0.35rem; }
.admin-page-hero p { max-width: 720px; margin: 0; color: var(--color-text-muted); }
.admin-page-hero .btn { flex: 0 0 auto; }

.admin-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.admin-toolbar p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.88rem;
  font-weight: 700;
}

.admin-table-card { padding: 1.25rem; }
.data-table--students th:first-child,
.data-table--students td:first-child { min-width: 16rem; }

.row-actions--students { min-width: 13rem; }

@media (max-width: 760px) {
  .admin-page-hero,
  .admin-toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .admin-page-hero .btn,
  .admin-toolbar .filter-bar {
    width: 100%;
  }

  .admin-toolbar .filter-bar {
    overflow-x: auto;
  }
}

/* --- Activity response review (admin) --- */
.response-page {
  max-width: 1120px;
}

.response-hero {
  margin: 0 0 1.5rem;
  padding: 2rem 2.25rem;
  border-radius: var(--radius-lg);
  color: #f7fbff;
  background: linear-gradient(135deg, #102d4f 0%, #1769aa 65%, #0c8f91 100%);
  box-shadow: var(--shadow-md);
}

.response-hero .crumb-pill {
  margin-bottom: 1.1rem;
  color: #c9ffff;
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.28);
}

.response-hero h1 { margin: 0 0 0.45rem; color: #fff; }
.response-hero p { margin: 0; color: #dbeaf5; max-width: 780px; }

.response-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}

.response-stat {
  padding: 1rem 1.1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.response-stat__value { display: block; color: var(--color-ink); font-size: 1.65rem; font-weight: 800; line-height: 1; }
.response-stat__label { display: block; margin-top: 0.4rem; color: var(--color-text-muted); font-size: 0.78rem; font-weight: 700; }
.response-stat--success { border-color: rgba(24, 137, 91, 0.35); background: #f1fbf5; }
.response-stat--success .response-stat__value { color: #14734d; }
.response-stat--warning { border-color: rgba(217, 119, 6, 0.35); background: #fffaf0; }
.response-stat--warning .response-stat__value { color: #a95c05; }

.response-toolbar {
  display: flex; align-items: end; justify-content: space-between; gap: 1rem;
  margin-bottom: 1rem; padding: 1rem 1.15rem;
  border: 1px solid var(--color-border); border-radius: var(--radius-md);
  background: var(--color-surface-alt);
}
.response-search { display: grid; gap: 0.35rem; min-width: min(100%, 360px); }
.response-search span { color: var(--color-text-muted); font-size: 0.78rem; font-weight: 800; }
.response-search input { width: 100%; padding: 0.7rem 0.85rem; border: 1px solid #aebdcb; border-radius: var(--radius-sm); color: #172b42; background: #fff; }
.response-search input:focus { outline: 3px solid rgba(23, 105, 170, 0.2); border-color: #1769aa; }
.response-toolbar__hint { margin: 0; color: var(--color-text-muted); font-size: 0.85rem; }

.response-list { display: grid; gap: 0.85rem; }
.response-student { overflow: hidden; border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-surface); box-shadow: var(--shadow-sm); }
.response-student[open] { border-color: rgba(23, 105, 170, 0.42); box-shadow: var(--shadow-md); }
.response-student__summary { display: flex; align-items: center; gap: 0.8rem; padding: 1rem 1.15rem; cursor: pointer; list-style: none; }
.response-student__summary::-webkit-details-marker, .response-activity summary::-webkit-details-marker { display: none; }
.response-avatar { display: grid; place-items: center; width: 2.25rem; height: 2.25rem; flex: 0 0 auto; border-radius: 50%; color: #fff; background: #1769aa; font-weight: 800; }
.response-student__identity { display: grid; min-width: 0; flex: 1; }
.response-student__identity strong { overflow: hidden; color: var(--color-ink); text-overflow: ellipsis; white-space: nowrap; }
.response-student__identity small, .response-date { color: var(--color-text-muted); font-size: 0.78rem; }
.response-badge { padding: 0.25rem 0.6rem; border-radius: var(--radius-pill); font-size: 0.72rem; font-weight: 800; white-space: nowrap; }
.response-badge--success { color: #14734d; background: #e6f7ed; }
.response-badge--muted { color: #687789; background: #edf1f5; }
.response-progress { display: inline-flex; align-items: center; gap: 0.4rem; }
.response-progress__bar { width: 4.5rem; height: 0.4rem; overflow: hidden; border-radius: var(--radius-pill); background: var(--color-border); }
.response-progress__fill { display: block; height: 100%; border-radius: var(--radius-pill); background: #1769aa; }
.response-progress__value { color: var(--color-text-muted); font-size: 0.72rem; font-weight: 800; white-space: nowrap; }
.response-progress--high .response-progress__fill { background: #18895b; }
.response-progress--high .response-progress__value { color: #14734d; }
.response-progress--mid .response-progress__fill { background: #d97706; }
.response-progress--mid .response-progress__value { color: #a95c05; }
.response-progress--low .response-progress__fill { background: #c33d46; }
.response-progress--low .response-progress__value { color: #a3323c; }
.response-chevron { color: #1769aa; font-size: 1.25rem; transition: transform 0.2s ease; }
.response-student[open] > .response-student__summary .response-chevron, .response-activity[open] > summary .response-chevron { transform: rotate(180deg); }
.response-student__body { padding: 0 1.15rem 1.25rem; border-top: 1px solid var(--color-border); background: #fbfdff; }
.response-submission-meta { display: flex; justify-content: space-between; gap: 1rem; padding: 0.8rem 0; color: var(--color-text-muted); font-size: 0.8rem; }
.response-submission-meta strong { color: var(--color-ink); }
.response-activity { margin-top: 0.7rem; overflow: hidden; border: 1px solid #c7d5e2; border-radius: var(--radius-md); background: #fff; }
.response-activity summary { display: flex; align-items: center; gap: 0.7rem; padding: 0.9rem 1rem; cursor: pointer; list-style: none; }
.response-activity__title { flex: 1; color: #163d63; font-weight: 800; }
.response-activity__count { color: #60758a; font-size: 0.75rem; }
.response-activity__body { padding: 0.2rem 1rem 1rem; }
.response-answer { margin-top: 0.85rem; }
.response-answer h3 { margin: 0 0 0.35rem; color: #234b70; font-size: 0.86rem; line-height: 1.35; }
.response-answer__text { min-height: 2.6rem; padding: 0.8rem 0.95rem; border: 1px solid #b9c9d8; border-left: 4px solid #1769aa; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: #16263b; background: #eef4f8; font-size: 0.95rem; font-weight: 500; line-height: 1.55; white-space: pre-wrap; overflow-wrap: anywhere; }
.response-checklist { display: flex; justify-content: space-between; gap: 1rem; margin-top: 1rem; padding: 0.75rem 0.9rem; border: 1px solid #b7dcc8; border-radius: var(--radius-sm); color: #195b42; background: #effaf3; font-size: 0.82rem; }
.response-checklist span { color: #4b7564; }

.response-score { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.75rem; margin-top: 1rem; padding: 0.85rem 1rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: #fff; }
.response-score--graded { border-color: rgba(24, 137, 91, 0.35); background: #f1fbf5; }
.response-score__label { display: block; color: var(--color-text-muted); font-size: 0.72rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.04em; }
.response-score__value { display: block; margin-top: 0.15rem; color: var(--color-ink); font-size: 1.25rem; font-weight: 800; }
.response-score--graded .response-score__value { color: #14734d; }
.response-score form { display: flex; align-items: center; gap: 0.5rem; }
.response-score input[type="number"] { width: 5.5rem; padding: 0.5rem 0.6rem; border: 1px solid #aebdcb; border-radius: var(--radius-sm); color: #172b42; background: #fff; }
.response-score input[type="number"]:focus { outline: 3px solid rgba(23, 105, 170, 0.2); border-color: #1769aa; }

@media (max-width: 720px) {
  .response-stats { grid-template-columns: repeat(2, 1fr); }
  .response-toolbar { display: grid; align-items: stretch; }
  .response-search { min-width: 0; }
  .response-date { display: none; }
  .response-progress__bar { width: 3rem; }
  .response-student__summary { padding: 0.85rem; }
  .response-student__body { padding-inline: 0.85rem; }
}

/* --- Theory material reading list + in-app viewer --- */
.material-card__desc {
  margin: 0.2rem 0 0;
  overflow: hidden;
  color: var(--color-text-muted);
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.85rem;
}

.html-preview-viewer {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 2rem;
  background: rgba(8, 10, 16, 0.78);
  backdrop-filter: blur(2px);
}

.html-preview-viewer[hidden] { display: none; }

.html-preview-viewer__panel {
  display: flex;
  flex-direction: column;
  width: 90vw;
  height: 90vh;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
  animation: fade-in-up var(--duration-base) var(--ease-out) both;
}

.html-preview-viewer__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.1rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface-alt);
}

.html-preview-viewer__title {
  overflow: hidden;
  color: var(--color-ink);
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 700;
}

.html-preview-viewer__frame {
  flex: 1;
  width: 100%;
  border: 0;
  background: #fff;
}

@media (max-width: 720px) {
  .html-preview-viewer { padding: 0; }
  .html-preview-viewer__panel { width: 100vw; height: 100vh; border-radius: 0; }
}

/* --- Interactive activity (uploaded HTML) --- */
.activity-score-banner {
  display: inline-block;
  margin: 0.5rem 0;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
}

.activity-score-banner--success {
  background: var(--color-success-soft);
  color: var(--color-success);
}

.activity-score-banner--pending {
  background: var(--color-warning-soft);
  color: var(--color-warning);
}

.activity-frame {
  display: block;
  width: 100%;
  min-height: 70vh;
  margin-top: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: #fff;
}

.link-button {
  border: 0;
  background: none;
  padding: 0;
  font: inherit;
  color: var(--color-accent);
  text-decoration: underline;
  cursor: pointer;
}

.link-button:hover {
  color: var(--color-accent-light, var(--color-accent));
}