/* ============================================================
   Citas Bot — Landing page
   Mobile-first, responsive, modern
   ============================================================ */

:root {
  --teal-50: #f0fdfa;
  --teal-100: #ccfbf1;
  --teal-600: #0d9488;
  --teal-700: #0f766e;
  --teal-800: #115e59;
  --navy-900: #0f172a;
  --navy-800: #1e293b;
  --slate-600: #475569;
  --slate-500: #64748b;
  --slate-400: #94a3b8;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50: #f8fafc;
  --white: #ffffff;
  --accent: #14b8a6;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.10);
  --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.14);
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-display: "Sora", "Inter", system-ui, sans-serif;
  --header-h: 72px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
  font-family: var(--font-body);
  color: var(--navy-900);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

.container { width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 24px; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--teal-700); color: #fff; padding: 10px 16px;
  border-radius: 0 0 8px 0; z-index: 1000;
}
.skip-link:focus { left: 0; }

/* ---------- Typography ---------- */
h1, h2, h3 { font-family: var(--font-display); line-height: 1.15; letter-spacing: -0.02em; }

h1 { font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 800; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); font-weight: 700; }
h3 { font-size: 1.1rem; font-weight: 700; }

.eyebrow {
  display: inline-block;
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--teal-700);
  background: var(--teal-100);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 18px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 600; font-size: 0.95rem; line-height: 1;
  padding: 14px 24px; border-radius: 999px; cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
  border: 2px solid transparent; white-space: nowrap;
}
.btn--lg { padding: 16px 30px; font-size: 1rem; }
.btn--primary { background: var(--teal-700); color: #fff; }
.btn--primary:hover { background: var(--teal-800); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--ghost { background: transparent; color: var(--navy-900); border-color: var(--slate-200); }
.btn--ghost:hover { border-color: var(--teal-600); color: var(--teal-700); }
.btn--white { background: #fff; color: var(--teal-800); }
.btn--white:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(0,0,0,0.25); }
.btn--outline { background: transparent; color: #fff; border-color: rgba(255,255,255,0.5); }
.btn--outline:hover { background: rgba(255,255,255,0.1); border-color: #fff; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.site-header.is-scrolled { border-color: var(--slate-200); box-shadow: var(--shadow-sm); }

.nav-wrap { height: var(--header-h); display: flex; align-items: center; justify-content: space-between; gap: 16px; }

.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand__logo {
  width: 36px; height: 36px; border-radius: 10px;
  background: var(--teal-700); color: #fff;
  display: grid; place-items: center;
}
.brand__logo svg { width: 20px; height: 20px; }
.brand__name { font-family: var(--font-display); font-weight: 800; font-size: 1.2rem; }
.brand__name span { color: var(--teal-700); }

.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav ul { display: flex; align-items: center; gap: 24px; }
.main-nav a { font-size: 0.92rem; font-weight: 500; color: var(--slate-600); transition: color 0.2s ease; }
.main-nav ul a:hover { color: var(--teal-700); }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; width: 42px; height: 42px; flex-direction: column; justify-content: center; gap: 5px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--navy-900); border-radius: 2px; transition: transform 0.3s ease, opacity 0.3s ease; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: calc(var(--header-h) + 56px) 0 72px; overflow: hidden; }
.hero__bg {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(60% 50% at 15% 10%, var(--teal-100), transparent 60%),
    radial-gradient(50% 45% at 90% 20%, #e0f2fe, transparent 60%),
    linear-gradient(180deg, var(--slate-50), #fff);
}
.hero__grid { display: grid; grid-template-columns: 1fr; gap: 48px; align-items: center; }

.hero__title { margin-bottom: 20px; }
.hero__title span { color: var(--teal-700); }
.hero__subtitle { font-size: 1.15rem; color: var(--slate-600); max-width: 520px; margin-bottom: 32px; }

.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }

.hero__stats { display: flex; gap: 32px; flex-wrap: wrap; }
.hero__stats li { display: flex; flex-direction: column; }
.hero__stats strong { font-family: var(--font-display); font-size: 1.7rem; font-weight: 800; color: var(--navy-900); }
.hero__stats span { font-size: 0.85rem; color: var(--slate-500); }

.hero__visual { position: relative; }
.chat-mock {
  background: #fff; border: 1px solid var(--slate-200); border-radius: 20px;
  box-shadow: var(--shadow-lg); overflow: hidden; max-width: 400px; margin: 0 auto;
}
.chat-mock__head { display: flex; align-items: center; gap: 12px; padding: 16px 18px; border-bottom: 1px solid var(--slate-100); }
.chat-mock__avatar { width: 38px; height: 38px; border-radius: 50%; background: var(--teal-100); display: grid; place-items: center; font-size: 20px; }
.chat-mock__head strong { display: block; font-size: 0.95rem; }
.chat-mock__status { font-size: 0.75rem; color: var(--teal-600); font-weight: 600; }
.chat-mock__body { padding: 18px; display: flex; flex-direction: column; gap: 10px; background: var(--slate-50); }
.chat-mock__input { padding: 14px 18px; color: var(--slate-400); font-size: 0.85rem; border-top: 1px solid var(--slate-100); }

.msg { max-width: 85%; padding: 10px 14px; border-radius: 14px; font-size: 0.85rem; }
.msg--bot { align-self: flex-start; background: #fff; border: 1px solid var(--slate-200); border-bottom-left-radius: 4px; }
.msg--user { align-self: flex-end; background: var(--teal-700); color: #fff; border-bottom-right-radius: 4px; }
.msg--success { background: #ecfdf5; border-color: #a7f3d0; color: #047857; }

.chip-row { display: flex; flex-wrap: wrap; gap: 6px; padding: 0 4px; }
.chip { font-size: 0.75rem; font-weight: 600; padding: 6px 12px; border-radius: 999px; background: #fff; border: 1px solid var(--slate-200); color: var(--slate-600); }
.chip--active { background: var(--teal-700); color: #fff; border-color: var(--teal-700); }

.hero__float {
  position: absolute; font-size: 0.8rem; font-weight: 600; color: var(--navy-900);
  background: #fff; padding: 10px 14px; border-radius: 12px; box-shadow: var(--shadow-md);
  animation: float 4s ease-in-out infinite;
}
.hero__float--1 { top: 8%; left: -8px; }
.hero__float--2 { bottom: 10%; right: -6px; animation-delay: 1.5s; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* ---------- Sections ---------- */
.section { padding: 88px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-sub { color: var(--slate-600); margin-top: 16px; font-size: 1.05rem; }

/* ---------- Problem ---------- */
.problem { background: var(--slate-50); }
.problem__grid { display: grid; grid-template-columns: 1fr; gap: 20px; margin-bottom: 48px; }
.problem-card {
  background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius);
  padding: 28px; transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.problem-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.problem-card__icon { font-size: 2rem; display: block; margin-bottom: 14px; }
.problem-card h3 { margin-bottom: 8px; }
.problem-card p { color: var(--slate-600); font-size: 0.95rem; }

.problem__message {
  text-align: center; font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-family: var(--font-display); font-weight: 700; color: var(--navy-900);
}
.problem__message strong { color: var(--teal-700); }

/* ---------- Solution flow ---------- */
.solution { background: var(--navy-900); color: #fff; }
.solution .eyebrow { background: rgba(20, 184, 166, 0.15); color: var(--accent); }
.solution .section-sub { color: #cbd5e1; }

.flow { max-width: 460px; margin: 0 auto; display: flex; flex-direction: column; gap: 6px; }
.flow__step {
  display: flex; align-items: center; gap: 14px;
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.08);
  padding: 12px 18px; border-radius: 12px; font-weight: 600; font-size: 0.98rem;
}
.flow__dot { width: 40px; height: 40px; border-radius: 10px; background: rgba(255,255,255,0.08); display: grid; place-items: center; font-size: 1.2rem; }
.flow__step--bot { background: rgba(20,184,166,0.12); border-color: rgba(20,184,166,0.4); }
.flow__step--done { background: rgba(16,185,129,0.15); border-color: rgba(16,185,129,0.4); }
.flow__arrow { text-align: center; color: var(--slate-400); font-size: 1.1rem; line-height: 1; }

/* ---------- How it works ---------- */
.how__grid { display: grid; grid-template-columns: 1fr; gap: 24px; }
.step { padding: 28px; border-radius: var(--radius); background: var(--slate-50); border: 1px solid var(--slate-200); position: relative; }
.step__num {
  display: inline-grid; place-items: center; width: 46px; height: 46px; border-radius: 12px;
  background: var(--teal-700); color: #fff; font-family: var(--font-display); font-weight: 800;
  margin-bottom: 16px; font-size: 1.1rem;
}
.step h3 { margin-bottom: 8px; }
.step p { color: var(--slate-600); font-size: 0.95rem; }

/* ---------- Features ---------- */
.features { background: var(--slate-50); }
.features__grid { display: grid; grid-template-columns: 1fr; gap: 18px; }
.feature {
  background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius);
  padding: 26px; transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.feature:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.feature span { font-size: 1.6rem; display: block; margin-bottom: 12px; }
.feature h3 { margin-bottom: 6px; }
.feature p { color: var(--slate-600); font-size: 0.92rem; }

/* ---------- Experience ---------- */
.experience__grid { display: grid; grid-template-columns: 1fr; gap: 48px; align-items: center; }
.experience__content h2 { margin-bottom: 16px; }
.experience__content > p { color: var(--slate-600); margin-bottom: 24px; }
.checklist { display: flex; flex-direction: column; gap: 12px; }
.checklist li { display: flex; align-items: center; gap: 10px; font-weight: 500; }
.checklist li::before { content: "✓"; color: #fff; background: var(--teal-600); width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; font-size: 0.75rem; flex-shrink: 0; }
.chat-mock--full { max-width: 360px; }

/* ---------- Benefits ---------- */
.benefits__grid { display: grid; grid-template-columns: 1fr; gap: 18px; }
.benefit {
  background: var(--slate-50); border: 1px solid var(--slate-200); border-radius: var(--radius);
  padding: 26px; transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.benefit:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.benefit span { font-size: 1.6rem; display: block; margin-bottom: 12px; }
.benefit h3 { margin-bottom: 6px; }
.benefit p { color: var(--slate-600); font-size: 0.92rem; }

/* ---------- Integrations ---------- */
.integrations { background: var(--slate-50); }
.integrations__flow { display: flex; flex-direction: column; align-items: center; gap: 8px; max-width: 460px; margin: 0 auto; }
.node {
  width: 100%; background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius);
  padding: 20px 22px; display: grid; grid-template-columns: auto 1fr; column-gap: 14px; row-gap: 2px;
  box-shadow: var(--shadow-sm);
}
.node span { font-size: 1.6rem; grid-row: span 2; align-self: center; }
.node strong { font-family: var(--font-display); font-size: 1rem; }
.node em { font-style: normal; color: var(--slate-500); font-size: 0.82rem; }
.node--accent { border-color: var(--teal-600); background: var(--teal-50); }
.node--done { border-color: #a7f3d0; background: #ecfdf5; }
.node__arrow { color: var(--teal-600); font-size: 1.3rem; }

/* ---------- Use cases ---------- */
.usecases__grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.usecase {
  background: #fff; border: 1px solid var(--slate-200); border-radius: 999px;
  padding: 16px 26px; font-weight: 500; color: var(--navy-800);
  box-shadow: var(--shadow-sm); transition: transform 0.2s ease, border-color 0.2s ease;
}
.usecase:hover { transform: translateY(-2px); border-color: var(--teal-600); }

/* ---------- Trust ---------- */
.trust__grid { display: grid; grid-template-columns: 1fr; gap: 18px; }
.trust-item {
  background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius);
  padding: 26px; transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.trust-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.trust-item span { font-size: 1.6rem; display: block; margin-bottom: 12px; }
.trust-item h3 { margin-bottom: 6px; }
.trust-item p { color: var(--slate-600); font-size: 0.92rem; }

/* ---------- Demo ---------- */
.demo__grid { display: grid; grid-template-columns: 1fr; gap: 48px; align-items: center; }
.demo__content h2 { margin-bottom: 16px; }
.demo__content > p { color: var(--slate-600); margin-bottom: 24px; }

.demo-widget {
  background: #fff; border: 1px solid var(--slate-200); border-radius: 20px;
  box-shadow: var(--shadow-lg); overflow: hidden; max-width: 440px; margin: 0 auto; width: 100%;
}
.demo-widget__head { display: flex; align-items: center; gap: 12px; padding: 16px 18px; border-bottom: 1px solid var(--slate-100); }
.demo-widget__head strong { display: block; font-size: 0.95rem; }
.demo-widget__body { padding: 18px; display: flex; flex-direction: column; gap: 10px; background: var(--slate-50); min-height: 300px; max-height: 420px; overflow-y: auto; }
.demo-widget__actions { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 18px 18px; background: var(--slate-50); }
.quick-btn {
  font-size: 0.82rem; font-weight: 600; padding: 9px 14px; border-radius: 999px;
  background: #fff; border: 1px solid var(--slate-200); color: var(--navy-900); cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.quick-btn:hover { background: var(--teal-700); color: #fff; border-color: var(--teal-700); }
.demo-widget__reset {
  width: 100%; border: 0; background: var(--slate-100); color: var(--slate-600);
  padding: 12px; font-size: 0.82rem; font-weight: 600; cursor: pointer; transition: background 0.2s ease;
}
.demo-widget__reset:hover { background: var(--slate-200); }

/* ---------- Admin panel ---------- */
.panel { background: var(--navy-900); color: #fff; }
.panel .eyebrow { background: rgba(20, 184, 166, 0.15); color: var(--accent); }
.panel .section-sub { color: #cbd5e1; }

.dashboard {
  background: #fff; color: var(--navy-900); border-radius: 20px;
  box-shadow: var(--shadow-lg); overflow: hidden; max-width: 980px; margin: 0 auto;
}
.dashboard__bar {
  display: flex; align-items: center; gap: 12px; padding: 10px 16px;
  background: var(--slate-100); border-bottom: 1px solid var(--slate-200);
}
.dashboard__dots { display: flex; gap: 6px; }
.dashboard__dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--slate-300); }
.dashboard__dots i:first-child { background: #f87171; }
.dashboard__dots i:nth-child(2) { background: #fbbf24; }
.dashboard__dots i:nth-child(3) { background: #34d399; }
.dashboard__url {
  flex: 1; font-size: 0.78rem; color: var(--slate-500);
  background: #fff; border: 1px solid var(--slate-200); border-radius: 8px; padding: 4px 12px;
}

.dashboard__body { display: grid; grid-template-columns: 220px 1fr; }

.dash-side { border-right: 1px solid var(--slate-200); padding: 18px 12px; background: var(--slate-50); }
.dash-side__brand { display: flex; align-items: center; gap: 8px; padding: 0 8px 16px; border-bottom: 1px solid var(--slate-200); margin-bottom: 12px; }
.dash-side__brand .brand__logo { width: 28px; height: 28px; font-size: 0; }
.dash-side__name { font-family: var(--font-display); font-weight: 700; font-size: 0.95rem; }
.dash-side__menu { display: flex; flex-direction: column; gap: 4px; }
.dash-side__menu li {
  display: flex; align-items: center; gap: 10px; padding: 9px 10px;
  border-radius: 8px; font-size: 0.85rem; color: var(--slate-600);
}
.dash-side__menu li.is-active { background: var(--teal-700); color: #fff; }

.dash-main { padding: 20px; min-width: 0; }
.dash-main__head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 18px; }
.dash-main__head h3 { font-size: 1.15rem; }
.dash-main__head p { color: var(--slate-500); font-size: 0.82rem; }
.dash-filter {
  font-size: 0.78rem; font-weight: 600; color: var(--slate-600);
  border: 1px solid var(--slate-200); border-radius: 8px; padding: 6px 12px; white-space: nowrap;
}

.dash-kpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 16px; }
.kpi {
  background: var(--slate-50); border: 1px solid var(--slate-200); border-radius: 12px;
  padding: 14px; display: flex; flex-direction: column; gap: 4px;
}
.kpi__label { font-size: 0.72rem; color: var(--slate-500); }
.kpi strong { font-family: var(--font-display); font-size: 1.4rem; }
.kpi em { font-style: normal; font-size: 0.72rem; font-weight: 700; }
.kpi__up { color: #059669; }
.kpi__down { color: #dc2626; }
.kpi__neutral { color: var(--slate-500); }

.dash-card {
  background: #fff; border: 1px solid var(--slate-200); border-radius: 12px; padding: 16px;
}
.dash-card__head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.dash-card__head h4 { font-size: 0.9rem; font-family: var(--font-display); }
.dash-card__head span { font-size: 0.72rem; color: var(--slate-500); }

.dash-chart { margin-bottom: 16px; }
.bars { display: flex; align-items: flex-end; gap: 10px; height: 140px; }
.bar { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 6px; height: 100%; justify-content: flex-end; }
.bar span {
  width: 100%; max-width: 34px; background: linear-gradient(180deg, var(--accent), var(--teal-700));
  border-radius: 6px 6px 2px 2px;
}
.bar:nth-child(4) span { background: var(--teal-700); }
.bar i { font-style: normal; font-size: 0.72rem; color: var(--slate-500); }

.dash-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.progress-list { display: flex; flex-direction: column; gap: 12px; }
.progress { display: grid; grid-template-columns: 96px 1fr 34px; align-items: center; gap: 10px; }
.progress__label { font-size: 0.78rem; color: var(--slate-600); }
.progress__track { display: block; height: 8px; background: var(--slate-100); border-radius: 999px; overflow: hidden; }
.progress__track i { display: block; height: 100%; background: var(--teal-600); border-radius: 999px; }
.progress__val { font-size: 0.78rem; font-weight: 700; color: var(--slate-600); text-align: right; }

.panel__points { display: grid; grid-template-columns: 1fr; gap: 16px; max-width: 980px; margin: 40px auto 0; }
.panel__points li {
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius); padding: 22px;
}
.panel__points li span { font-size: 1.5rem; display: block; margin-bottom: 8px; }
.panel__points li strong { font-family: var(--font-display); display: block; margin-bottom: 4px; }
.panel__points li p { color: #cbd5e1; font-size: 0.9rem; }

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

@media (max-width: 720px) {
  .dashboard__body { grid-template-columns: 1fr; }
  .dash-side { border-right: 0; border-bottom: 1px solid var(--slate-200); }
  .dash-side__menu { flex-direction: row; flex-wrap: wrap; gap: 6px; }
  .dash-kpis { grid-template-columns: repeat(2, 1fr); }
  .dash-row { grid-template-columns: 1fr; }
}

/* ---------- CTA ---------- */
.cta {
  background: linear-gradient(135deg, var(--teal-700), #0d9488 50%, var(--teal-800));
  color: #fff; padding: 88px 0; text-align: center;
}
.cta__inner { max-width: 720px; }
.cta h2 { margin-bottom: 16px; }
.cta p { color: #ccfbf1; margin-bottom: 32px; font-size: 1.1rem; }
.cta__actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy-900); color: #cbd5e1; padding: 64px 0 24px; }
.footer__grid { display: grid; grid-template-columns: 1fr; gap: 40px; margin-bottom: 40px; }
.footer__brand p { color: #94a3b8; font-size: 0.9rem; margin-top: 16px; max-width: 300px; }
.footer__brand .brand { color: #fff; }
.footer__brand .brand__logo { background: var(--teal-600); }
.footer__col h3 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; }
.footer__col ul { display: flex; flex-direction: column; gap: 10px; }
.footer__col a { color: #94a3b8; font-size: 0.9rem; transition: color 0.2s ease; }
.footer__col a:hover { color: #fff; }
.footer__bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px; text-align: center; }
.footer__bottom p { color: #64748b; font-size: 0.85rem; }

/* ---------- Reveal animations ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (min-width: 640px) {
  .problem__grid { grid-template-columns: repeat(2, 1fr); }
  .how__grid { grid-template-columns: repeat(2, 1fr); }
  .features__grid { grid-template-columns: repeat(2, 1fr); }
  .benefits__grid { grid-template-columns: repeat(2, 1fr); }
  .trust__grid { grid-template-columns: repeat(2, 1fr); }
  .usecases__grid { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 900px) {
  .hero__grid { grid-template-columns: 1.1fr 0.9fr; }
  .features__grid { grid-template-columns: repeat(3, 1fr); }
  .benefits__grid { grid-template-columns: repeat(4, 1fr); }
  .experience__grid { grid-template-columns: 1fr 0.9fr; }
  .demo__grid { grid-template-columns: 1fr 1fr; }
  .how__grid { grid-template-columns: repeat(5, 1fr); }
  .usecases__grid { grid-template-columns: repeat(3, 1fr); }
  .footer__grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}

@media (max-width: 899px) {
  .main-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0;
    background: #fff; flex-direction: column; align-items: stretch;
    gap: 0; padding: 16px 24px 24px; border-bottom: 1px solid var(--slate-200);
    transform: translateY(-120%); transition: transform 0.3s ease; box-shadow: var(--shadow-md);
  }
  .main-nav.is-open { transform: translateY(0); }
  .main-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .main-nav ul a { display: block; padding: 14px 0; border-bottom: 1px solid var(--slate-100); font-size: 1rem; }
  .nav-cta { margin-top: 16px; }
  .nav-toggle { display: flex; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}