@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Source+Code+Pro:wght@400;600;700&family=Sora:wght@300;400&display=swap');

:root {
  /* Surface Colors - manual STERILE */
  --bg-ice: #FAFBFC;
  --bg-cloud: #F4F5F7;
  --bg-steel: #ECEEF1;

  /* Ink Colors (Text) */
  --ink: #111318;
  --ink-soft: #3D4250;
  --ink-muted: #9CA3AF;
  --ink-light: #D1D5DB;

  /* Brand Accents */
  --brand-mint: #10B981;
  --brand-cyan: #009FE3;
  --brand-violet: #7C3AED;
  --brand-magenta: #C850C0;

  /* Functional */
  --color-green: #10B981;
  --color-red: #EF4444;

  /* Gradient */
  --grad-ia: linear-gradient(135deg, #009FE3 0%, #7C3AED 50%, #C850C0 100%);
  --grad-ia-soft: linear-gradient(135deg, rgba(0, 159, 227, 0.06), rgba(124, 58, 237, 0.04), rgba(200, 80, 192, 0.03));

  /* Fonts */
  --font-main: 'Plus Jakarta Sans', sans-serif;
  --font-mono: 'Source Code Pro', monospace;
  --font-accent: 'Sora', sans-serif;

  /* Layout & Grid */
  --max-width: 1200px;
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Border */
  --border-sterile: rgba(0,0,0,0.06);

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
  --shadow-cyan: 0 4px 16px rgba(0, 159, 227, 0.18);

  /* Notebook Patterns */
  --nb-math:
    linear-gradient(rgba(0,0,0,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.025) 1px, transparent 1px);
  --nb-math-size: 32px 32px;
  --nb-lang-margin:
    linear-gradient(rgba(0,0,0,0.04) 1px, transparent 1px),
    linear-gradient(90deg, transparent 47px, rgba(239,68,68,0.12) 47px, rgba(239,68,68,0.12) 48px, transparent 48px);
  --nb-lang-margin-size: 100% 28px, 100% 100%;

  /* Legacy overrides for compatibility */
  --bg-base: var(--bg-ice);
  --bg-panel: #FFFFFF;
  --text-main: var(--ink);
  --text-muted: var(--ink-soft);
  --text-light: var(--ink-muted);
  --border-light: var(--border-sterile);
  --font-sans: var(--font-main);
}

/* Reset & BaseStyles */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  overflow-x: hidden;
  width: 100%;
  position: relative;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  background-color: var(--bg-base);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-sans);
  font-weight: 800;
  line-height: 1.3;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

p {
  color: var(--text-muted);
  font-weight: 400;
}

a {
  color: var(--brand-cyan);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--brand-cyan-hover);
}

a.btn:hover,
.btn:hover {
  text-decoration: none;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

@media (max-width: 768px) {
  .container {
    padding: 0 24px;
  }
}

.section {
  padding: 80px 0;
  position: relative;
  z-index: 10;
}

/* Background Blurs */
.blur-bg {
  position: absolute;
  z-index: 0;
  pointer-events: none;
  /* El SVG real será llamado vía 'src' en un img o background, 
     pero podemos definir los tamaños absolutos aquí. */
  width: 800px;
  height: 800px;
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
}

.blur-cyan {
  background-image: url('../assets/blur-cyan.svg?v=2');
}

.blur-magenta {
  background-image: url('../assets/blur-magenta.svg?v=2');
}

/* Botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-xs);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--grad-ia);
  color: #fff;
  box-shadow: var(--shadow-cyan);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 159, 227, 0.25);
  color: #fff;
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--border-light);
  color: var(--ink);
}

.btn-outline:hover {
  background: var(--bg-cloud);
  border-color: var(--ink-muted);
}

.btn-gradient {
  background: var(--grad-ia);
  color: #fff;
  box-shadow: var(--shadow-cyan);
}

.btn-gradient:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 159, 227, 0.25);
  color: #fff;
}

/* Avatar Group */
.avatar-group {
  display: flex;
  align-items: center;
}

.avatar-group img,
.avatar-plus {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid var(--bg-base);
  margin-left: -12px;
  object-fit: cover;
}

.avatar-group img:first-child {
  margin-left: 0;
}

.avatar-plus {
  background: #10B981;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}

/* Glassmorphism Panels */
.panel {
  background: var(--bg-ice);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

/* Reusable Banner Component */
.cta-banner {
  background: var(--bg-ice);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 80px 48px;
  text-align: center;
  margin: 40px auto;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.cta-banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: var(--nb-math);
  background-size: var(--nb-math-size);
  opacity: 0.5;
  pointer-events: none;
}

.cta-banner h2 {
  font-family: var(--font-sans);
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 20px;
  color: var(--ink);
  line-height: 1.1;
  position: relative;
}

.cta-banner p {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--ink-soft);
  max-width: 600px;
  margin: 0 auto 40px;
  position: relative;
}

.cta-banner .banner-actions {
  display: flex;
  justify-content: center;
  gap: 20px;
}

@media (max-width: 768px) {
  .cta-banner {
    padding: 40px 24px;
    margin: 20px 0;
    /* Margin top/bottom only, width logic from container */
    border-radius: var(--radius-md);
  }

  .cta-banner h2 {
    font-size: 1.75rem;
  }

  .cta-banner p {
    font-size: 1rem;
    margin-bottom: 30px;
  }

  .cta-banner .banner-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
}
/* --- Brand Utilities --- */
.gt {
  background: var(--grad-ia);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
}

.badge-sterile {
  display: inline-flex;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  font-weight: 600;
  background: var(--bg-cloud);
  color: var(--ink-muted);
  border: 1px solid var(--border-light);
}

.badge-mint {
  background: rgba(16, 185, 129, 0.06);
  color: var(--brand-mint);
  border: 1px solid rgba(16, 185, 129, 0.18);
}

.badge-ia {
  background: var(--grad-ia-soft);
  color: var(--brand-violet);
  border: 1px solid rgba(124, 58, 237, 0.1);
}

/* Notebook Utils */
.math-grid {
  background-image: var(--nb-math);
  background-size: var(--nb-math-size);
  background-color: var(--bg-ice);
}

.lang-margin {
  background-image: var(--nb-lang-margin);
  background-size: var(--nb-lang-margin-size);
  background-color: var(--bg-ice);
  padding-left: 56px !important;
}

.rx-block {
  padding: 12px 14px;
  border-radius: var(--radius-xs);
  background: rgba(16, 185, 129, 0.04);
  border: 1px dashed rgba(16, 185, 129, 0.2);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.rx-block .rl { color: var(--brand-mint); font-weight: 700; }
.rx-block .rv { color: var(--ink); font-weight: 600; }
/* App Download Modal */
.app-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.app-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.app-modal-content {
    background: #fff;
    width: 100%;
    max-width: 500px;
    border-radius: 32px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 40px 80px -15px rgba(0, 0, 0, 0.3);
    transform: translateY(20px);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.app-modal-overlay.active .app-modal-content {
    transform: translateY(0);
}

.app-modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    border: none;
    color: var(--text-main);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: all 0.2s;
}

.app-modal-close:hover {
    transform: rotate(90deg);
    background: #fff;
}

.app-modal-header {
    background: linear-gradient(135deg, var(--brand-cyan) 0%, var(--brand-magenta) 100%);
    padding: 40px 40px 20px;
    text-align: center;
    color: white;
}

.app-modal-img {
    width: 180px;
    height: auto;
    margin-bottom: -60px;
    filter: drop-shadow(0 20px 30px rgba(0,0,0,0.2));
}

.app-modal-body {
    padding: 60px 40px 40px;
    text-align: center;
}

.app-modal-title {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--text-main);
}

.app-modal-text {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 32px;
    line-height: 1.5;
}

.app-modal-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
}