/* =============================================
   ALTIROCHAT — style.css
   Mobile-first, CSS puro, sin frameworks
   ============================================= */

/* ── CSS Variables (Dark Mode por defecto) ── */
:root {
  --bg-primary:    #0a0a0a;
  --bg-secondary:  #111111;
  --bg-card:       #1a1a1a;
  --accent:        #00e676;
  --accent-hover:  #00c853;
  --text-primary:  #ffffff;
  --text-secondary:#a0a0a0;
  --border:        #2a2a2a;
  --gradient:      linear-gradient(135deg, #00e676, #00bcd4);

  /* Derived tokens */
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-pill:999px;

  --shadow-card: 0 1px 3px rgba(0,0,0,.4), 0 4px 16px rgba(0,0,0,.3);
  --shadow-navbar: 0 1px 0 var(--border);

  --transition: 0.2s ease;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
}

/* ── Light Mode (toggle lógico invertido) ── */
[data-theme="light"] {
  --bg-primary:    #f5f5f5;
  --bg-secondary:  #ffffff;
  --bg-card:       #ffffff;
  --accent:        #00a651;
  --accent-hover:  #007d3c;
  --text-primary:  #0a0a0a;
  --text-secondary:#555555;
  --border:        #e0e0e0;

  --shadow-card: 0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
  --shadow-navbar: 0 1px 0 var(--border);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s ease, color 0.3s ease;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* ── Container ── */
.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: var(--radius-pill);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition),
              box-shadow var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
  text-decoration: none;
}

.btn--primary {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}
.btn--primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(0,230,118,.25);
}

.btn--outlined {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}
.btn--outlined:hover {
  background: var(--accent);
  color: #000;
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border);
}
.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn--full {
  width: 100%;
}

/* ── Gradient text ── */
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─────────────────────────────────
   NAVBAR
───────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-primary);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition),
              background-color 0.3s ease;
}

.navbar.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 4px 24px rgba(0,0,0,.3);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg-primary) 85%, transparent);
}

.navbar__inner {
  height: 64px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.navbar__logo img {
  height: 36px;
  width: auto;
}

.navbar__links {
  display: none;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}

.navbar__links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.navbar__links a:hover {
  color: var(--text-primary);
}

.navbar__actions {
  display: none;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-pill);
  background: var(--bg-card);
  border: 1px solid var(--border);
  cursor: pointer;
  color: var(--text-secondary);
  transition: color var(--transition), background var(--transition);
  flex-shrink: 0;
}
.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.theme-toggle__icon { display: none; }

[data-theme="dark"] .theme-toggle__icon--dark  { display: flex; }
[data-theme="light"] .theme-toggle__icon--light { display: flex; }

/* Burger */
.navbar__burger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}
.navbar__burger span {
  display: block;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.navbar__burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar__burger.open span:nth-child(2) { opacity: 0; }
.navbar__burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.navbar__mobile {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 20px 16px;
  border-top: 1px solid var(--border);
  background: var(--bg-primary);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}
.navbar__mobile.open {
  max-height: 360px;
}
.navbar__mobile a {
  padding: 10px 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}
.navbar__mobile a:last-child {
  border-bottom: none;
  margin-top: 8px;
  text-align: center;
}
.navbar__mobile a:hover {
  color: var(--accent);
}

/* Desktop navbar */
@media (min-width: 768px) {
  .navbar__links  { display: flex; }
  .navbar__actions{ display: flex; }
  .navbar__burger { display: none; }
  .navbar__mobile { display: none !important; }
  .navbar__links  { margin-left: auto; }
  .navbar__actions{ margin-left: 0; }
}

/* ─────────────────────────────────
   HERO
───────────────────────────────── */
.hero {
  padding: 80px 0 60px;
  background: radial-gradient(ellipse 80% 50% at 50% -10%,
    rgba(0,230,118,.12) 0%, transparent 70%),
    var(--bg-primary);
  overflow: hidden;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 48px;
}

.hero__content {
  text-align: center;
  max-width: 720px;
}

.hero__badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 28px;
}

.channel-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: .02em;
}

.channel-badge--wa {
  background: rgba(37,211,102,.12);
  color: #25d366;
  border: 1px solid rgba(37,211,102,.25);
}
.channel-badge--fb {
  background: rgba(24,119,242,.12);
  color: #1877f2;
  border: 1px solid rgba(24,119,242,.25);
}
.channel-badge--ig {
  background: rgba(225,48,108,.12);
  color: #e1306c;
  border: 1px solid rgba(225,48,108,.25);
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -.02em;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

/* ── Terminal ── */
.hero__terminal {
  width: 100%;
  max-width: 480px;
}

.terminal {
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0,0,0,.5), 0 0 0 1px rgba(0,230,118,.08);
}

.terminal__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: #161b22;
  border-bottom: 1px solid #21262d;
}

.terminal__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.terminal__dot--red    { background: #ff5f57; }
.terminal__dot--yellow { background: #febc2e; }
.terminal__dot--green  { background: #28c840; }

.terminal__title {
  font-size: 0.75rem;
  color: #8b949e;
  margin-left: auto;
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.terminal__body {
  padding: 20px 24px;
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.82rem;
  line-height: 1.8;
}

.terminal__line {
  display: flex;
  align-items: baseline;
  gap: 8px;
  opacity: 0;
  animation: termLine 0.15s ease forwards;
}

.terminal__line:nth-child(1)  { animation-delay: 0.4s; }
.terminal__line:nth-child(2)  { animation-delay: 0.7s; }
.terminal__line:nth-child(3)  { animation-delay: 1.0s; }
.terminal__line:nth-child(4)  { animation-delay: 1.3s; }
.terminal__line:nth-child(5)  { animation-delay: 1.6s; }
.terminal__line:nth-child(6)  { animation-delay: 1.9s; }
.terminal__line:nth-child(7)  { animation-delay: 2.2s; }
.terminal__line:nth-child(8)  { animation-delay: 2.5s; }

@keyframes termLine {
  to { opacity: 1; }
}

.terminal__line--out { padding-left: 16px; }

.terminal__prompt { color: var(--accent); }
.terminal__key    { color: #79c0ff; }
.terminal__colon  { color: #8b949e; }
.terminal__str    { color: #a5d6ff; }
.terminal__num    { color: #f8c038; }
.terminal__arr    { color: #8b949e; }
.terminal__comma  { color: #8b949e; }
.terminal__status { color: var(--accent); font-weight: 700; }
.terminal__cursor {
  color: var(--accent);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

@media (min-width: 900px) {
  .hero__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  .hero__content {
    text-align: left;
    flex: 1;
  }
  .hero__badges { justify-content: flex-start; }
  .hero__subtitle { margin-left: 0; }
  .hero__ctas { justify-content: flex-start; }
  .hero__terminal {
    flex-shrink: 0;
    width: 420px;
  }
}

/* ─────────────────────────────────
   STATS
───────────────────────────────── */
.stats {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 28px 0;
}

.stats__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0;
}

.stats__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 32px;
  text-align: center;
}

.stats__value {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 4px;
}

.stats__label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-weight: 500;
  max-width: 120px;
  line-height: 1.4;
}

.stats__divider {
  width: 1px;
  height: 48px;
  background: var(--border);
  display: none;
}

@media (min-width: 600px) {
  .stats__inner { flex-wrap: nowrap; }
  .stats__divider { display: block; }
  .stats__item { flex: 1; }
}

/* ─────────────────────────────────
   SECTIONS (shared)
───────────────────────────────── */
.section {
  padding: 80px 0;
  background: var(--bg-primary);
}

.section--alt {
  background: var(--bg-secondary);
}

.section__header {
  text-align: center;
  margin-bottom: 56px;
}

.section__eyebrow {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section__title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.02em;
  margin-bottom: 16px;
}

.section__desc {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ─────────────────────────────────
   FEATURES GRID
───────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: border-color var(--transition), transform var(--transition),
              box-shadow var(--transition);
}

.feature-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card), 0 0 0 1px rgba(0,230,118,.1);
}

.feature-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(0,230,118,.08);
  color: var(--accent);
  margin-bottom: 16px;
}

.feature-card__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card__desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

@media (min-width: 600px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px) {
  .features-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ─────────────────────────────────
   CHANNELS GRID
───────────────────────────────── */
.channels-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.channel-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.channel-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.channel-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
}

.channel-card__header--wa { background: linear-gradient(135deg, rgba(37,211,102,.18), rgba(37,211,102,.04)); }
.channel-card__header--fb { background: linear-gradient(135deg, rgba(24,119,242,.18), rgba(24,119,242,.04)); }
.channel-card__header--ig { background: linear-gradient(135deg, rgba(225,48,108,.18), rgba(225,48,108,.04)); }

.channel-card__logo {
  padding: 10px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
}
.channel-card__header--wa .channel-card__logo { color: #25d366; }
.channel-card__header--fb .channel-card__logo { color: #1877f2; }
.channel-card__header--ig .channel-card__logo { color: #e1306c; }

.channel-card__badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  letter-spacing: .03em;
}

.channel-card__body {
  padding: 24px;
}

.channel-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.channel-card__features {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.channel-card__features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.channel-card__features li::before {
  content: '';
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 6px;
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .channels-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ─────────────────────────────────
   USE CASES GRID
───────────────────────────────── */
.usecases-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.usecase-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: border-color var(--transition), transform var(--transition),
              box-shadow var(--transition);
}

.usecase-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.usecase-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(0,230,118,.08);
  color: var(--accent);
  margin-bottom: 20px;
}

.usecase-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.usecase-card__subtitle {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: .04em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.usecase-card__desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
}

.usecase-card__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.usecase-card__list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.usecase-card__list li::before {
  content: '';
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .usecases-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ─────────────────────────────────
   CONTACT
───────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: start;
}

.contact__desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-top: 12px;
  margin-bottom: 32px;
}

.contact__details {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact__detail {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.contact__detail svg {
  color: var(--accent);
  flex-shrink: 0;
}

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-label span {
  color: var(--accent);
}

.form-input {
  width: 100%;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-family: var(--font);
  font-size: 0.9rem;
  color: var(--text-primary);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  -webkit-appearance: none;
}

.form-input::placeholder {
  color: var(--text-secondary);
  opacity: .7;
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,230,118,.12);
}

.form-input--textarea {
  resize: vertical;
  min-height: 110px;
}

.form-hint {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

@media (min-width: 900px) {
  .contact-grid {
    grid-template-columns: 1fr 1.2fr;
  }
}

/* ─────────────────────────────────
   FOOTER
───────────────────────────────── */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 40px 0;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__tagline {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.footer__copy {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.footer__links {
  display: flex;
  gap: 20px;
}

.footer__links a {
  font-size: 0.82rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.footer__links a:hover {
  color: var(--accent);
}

/* ─────────────────────────────────
   SCROLL ANIMATIONS
───────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.fade-in--delay {
  transition-delay: 0.15s;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children inside grids */
.features-grid .fade-in:nth-child(2),
.channels-grid .fade-in:nth-child(2),
.usecases-grid .fade-in:nth-child(2)  { transition-delay: 0.1s; }

.features-grid .fade-in:nth-child(3),
.channels-grid .fade-in:nth-child(3),
.usecases-grid .fade-in:nth-child(3)  { transition-delay: 0.2s; }

.features-grid .fade-in:nth-child(4)  { transition-delay: 0.1s; }
.features-grid .fade-in:nth-child(5)  { transition-delay: 0.2s; }
.features-grid .fade-in:nth-child(6)  { transition-delay: 0.3s; }

/* ─────────────────────────────────
   ACCESSIBILITY
───────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .fade-in {
    opacity: 1;
    transform: none;
  }
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}