/* NoteSurfing · notesurfing.com — tema oscuro con acento turquesa (colores de la app) */
:root {
  --bg: #070B10;
  --bg-2: #0B1118;
  --surface: rgba(21, 32, 42, 0.55);
  --surface-solid: #111A23;
  --border: rgba(94, 234, 212, 0.14);
  --border-soft: rgba(148, 163, 184, 0.14);
  --text: #F1F5F9;
  --muted: #94A3B8;
  --accent: #2BD4C0;
  --accent-2: #10A697;
  --accent-ink: #04201D;
  --glow: rgba(16, 166, 151, 0.45);
  --radius: 18px;
  --max: 1160px;
  color-scheme: dark;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 17px;
  overflow-x: hidden;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; position: relative; }
@media (min-width: 720px) { .wrap { padding: 0 32px; } }

.accent { color: var(--accent); }
.eyebrow {
  display: block; font-size: 13px; font-weight: 600; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 16px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(7, 11, 16, 0.72);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--border-soft);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 19px; letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; }
.brand img { width: 34px; height: 34px; border-radius: 9px; }
.nav { display: flex; align-items: center; gap: 24px; font-size: 15px; }
.nav a { color: var(--muted); }
.nav a:hover { color: var(--text); text-decoration: none; }
.nav .lang { border: 1px solid var(--border-soft); border-radius: 8px; padding: 4px 10px; font-weight: 600; color: var(--text); }
.btn {
  display: inline-flex; align-items: center; gap: 10px; font-weight: 600;
  border-radius: 999px; transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); padding: 10px 20px; box-shadow: 0 8px 30px -8px var(--glow); }
.btn-primary:hover { background: #4FE3D1; color: var(--accent-ink); }
.btn-lg { padding: 16px 30px; font-size: 18px; }
.btn svg { width: 18px; height: 18px; }
.nav .btn-primary { color: var(--accent-ink); font-size: 14px; padding: 8px 16px; }
@media (max-width: 860px) { .nav .hide-md { display: none; } }
@media (max-width: 520px) { .nav .hide-sm { display: none; } }

/* ---------- Ondas de fondo ---------- */
.waves { position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 0; }
.waves svg { position: absolute; left: 0; width: 200%; height: 100%; }
.waves .w1 { animation: drift 38s linear infinite; }
.waves .w2 { animation: drift 54s linear infinite reverse; }
.waves .w3 { animation: drift 70s linear infinite; }
@keyframes drift { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) { .waves svg { animation: none !important; } }
.glow-blob {
  position: absolute; border-radius: 50%; filter: blur(80px); pointer-events: none; z-index: 0;
  background: radial-gradient(circle, rgba(16,166,151,.55), rgba(16,166,151,0) 70%);
}

/* ---------- Hero ---------- */
.hero { position: relative; padding: 56px 0 72px; overflow: hidden; }
.hero .wrap { display: grid; gap: 40px; align-items: center; z-index: 1; }
@media (min-width: 900px) { .hero .wrap { grid-template-columns: 1.05fr 0.95fr; } .hero { padding: 88px 0 104px; } }
.hero h1 { font-size: clamp(42px, 7.2vw, 76px); line-height: 1.02; letter-spacing: -0.035em; font-weight: 700; margin-bottom: 22px; }
.hero h1 .accent { display: block; background: linear-gradient(90deg, #5EEAD4, #2BD4C0 50%, #10A697); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lead { font-size: 19px; color: #CBD5E1; max-width: 33em; margin-bottom: 32px; }
.hero-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-bottom: 22px; }
.stores { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.stores a { display: block; transition: transform .15s ease; }
.stores a:hover { transform: translateY(-1px); }
.stores .badge-apple { height: 48px; width: auto; }
.stores .badge-play { height: 70px; width: auto; margin: -11px -10px; } /* el PNG de Google trae margen propio */
.perks { display: flex; flex-wrap: wrap; gap: 10px 26px; margin-top: 30px; font-size: 15px; color: #CBD5E1; }
.perks span { display: inline-flex; align-items: center; gap: 8px; }
.perks svg { width: 18px; height: 18px; stroke: var(--accent); fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- Teléfonos ---------- */
.phone {
  position: relative; width: 290px; aspect-ratio: 1056 / 2172;
  border-radius: 44px; padding: 10px;
  background: linear-gradient(145deg, #2A3542, #0D141B 40%, #1B2530);
  box-shadow: 0 0 0 1px rgba(255,255,255,.06) inset, 0 40px 80px -30px rgba(0,0,0,.8), 0 0 90px -10px var(--glow);
}
.phone .screen { width: 100%; height: 100%; border-radius: 35px; overflow: hidden; background: #0B0F14; position: relative; }
.phone .screen img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.phone::after { /* reflejo */
  content: ""; position: absolute; inset: 10px; border-radius: 35px; pointer-events: none;
  background: linear-gradient(115deg, rgba(255,255,255,.10), rgba(255,255,255,0) 35%);
}
.hero-visual { position: relative; display: flex; justify-content: center; perspective: 1400px; min-height: 520px; }
.hero-visual .phone { transform: rotateY(-16deg) rotateX(6deg) rotateZ(4deg); width: min(310px, 72vw); }
.hero-visual .glow-blob { width: 420px; height: 420px; top: 10%; left: 50%; transform: translateX(-50%); }

/* ---------- Secciones ---------- */
section { position: relative; padding: 88px 0; }
.section-line { border-top: 1px solid var(--border-soft); }
.section-head { max-width: 640px; margin-bottom: 44px; position: relative; z-index: 1; }
.section-head h2 { font-size: clamp(30px, 4.6vw, 46px); line-height: 1.1; letter-spacing: -0.025em; margin-bottom: 14px; }
.section-head p { color: var(--muted); font-size: 18px; }

.glass {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}

/* Módulos */
.skills { display: grid; gap: 14px; grid-template-columns: 1fr; position: relative; z-index: 1; }
@media (min-width: 560px) { .skills { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .skills { grid-template-columns: repeat(3, 1fr); } }
.skill { padding: 26px 22px; transition: border-color .2s ease, transform .2s ease; }
.skill:hover { border-color: rgba(94, 234, 212, .4); transform: translateY(-3px); }
.skill .ico {
  width: 60px; height: 60px; border-radius: 16px; margin-bottom: 18px;
  display: flex; align-items: center; justify-content: center;
  background: color-mix(in srgb, var(--mod, #2BD4C0) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--mod, #2BD4C0) 28%, transparent);
}
.skill .ico svg { width: 34px; height: 34px; }
.skill:hover { border-color: color-mix(in srgb, var(--mod, #2BD4C0) 50%, transparent); }
.skill h3 { font-size: 19px; margin-bottom: 6px; }
.skill p { color: var(--muted); font-size: 15px; line-height: 1.5; }

/* Corrección real */
.feedback .wrap { display: grid; gap: 56px; align-items: center; }
@media (min-width: 960px) { .feedback .wrap { grid-template-columns: 1.1fr 0.9fr; } }
.fan { position: relative; height: 560px; display: flex; justify-content: center; align-items: center; perspective: 1400px; }
.fan .phone { position: absolute; width: 230px; }
.fan .p-left { transform: translateX(-62%) rotate(-9deg) scale(.88); opacity: .78; }
.fan .p-right { transform: translateX(62%) rotate(9deg) scale(.88); opacity: .78; }
.fan .p-center { z-index: 2; width: 260px; }
.fan .glow-blob { width: 380px; height: 380px; left: 50%; top: 50%; transform: translate(-50%, -50%); }
@media (max-width: 560px) {
  .fan { height: 470px; }
  .fan .phone { width: 180px; }
  .fan .p-center { width: 210px; }
  .fan .p-left { transform: translateX(-48%) rotate(-9deg) scale(.86); }
  .fan .p-right { transform: translateX(48%) rotate(9deg) scale(.86); }
}
.checks { list-style: none; display: grid; gap: 14px; margin-top: 28px; }
.checks li { display: flex; gap: 14px; align-items: flex-start; color: #CBD5E1; }
.checks .tick {
  flex: none; width: 30px; height: 30px; border-radius: 50%; border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center; color: var(--accent); background: rgba(43,212,192,.08);
}
.checks .tick svg { width: 16px; height: 16px; stroke: currentColor; fill: none; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }

/* Niveles */
.levels .wrap { display: grid; gap: 48px; align-items: center; }
@media (min-width: 960px) { .levels .wrap { grid-template-columns: 1.25fr 0.75fr; } }
.track { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 640px) { .track { grid-template-columns: 1fr; } }
.stage { padding: 22px 20px 20px; }
.stage h3 { font-size: 17px; margin-bottom: 14px; }
.stage .dots { display: flex; align-items: center; gap: 0; margin-bottom: 14px; }
.stage .dots i { width: 16px; height: 16px; border-radius: 50%; border: 2px solid var(--accent); background: var(--accent); box-shadow: 0 0 14px var(--glow); flex: none; }
.stage .dots i.soon { background: transparent; box-shadow: none; border-color: rgba(148,163,184,.5); }
.stage .dots b { flex: 1; height: 2px; background: linear-gradient(90deg, var(--accent), rgba(43,212,192,.3)); }
.stage .dots b.soon { background: rgba(148,163,184,.3); }
.stage ul { list-style: none; font-size: 15px; }
.stage li { display: flex; flex-direction: column; color: #CBD5E1; line-height: 1.3; }
.stage li + li { margin-top: 6px; }
.stage li small { color: var(--accent); font-size: 12px; font-weight: 600; letter-spacing: .02em; }
.stage li small.soon { color: var(--muted); font-weight: 500; }
.levels-visual { display: flex; justify-content: center; position: relative; }
.levels-visual .phone { width: 250px; transform: rotate(-4deg); }
.levels-visual .glow-blob { width: 340px; height: 340px; top: 15%; left: 50%; transform: translateX(-50%); }
@media (max-width: 959px) { .levels-visual { display: none; } }

/* Origen */
.origin { display: grid; gap: 14px; }
@media (min-width: 760px) { .origin { grid-template-columns: 1fr 1fr; } }
.origin .glass { padding: 30px 28px; }
.origin h3 { font-size: 20px; margin-bottom: 10px; }
.origin p { color: var(--muted); }

/* CTA final */
.cta-band { position: relative; overflow: hidden; border-radius: 28px; padding: 48px 28px; display: grid; gap: 32px; align-items: center;
  background: linear-gradient(135deg, rgba(16,166,151,.28), rgba(11,17,24,.9) 55%), var(--bg-2); border: 1px solid var(--border); }
@media (min-width: 900px) { .cta-band { grid-template-columns: 1.2fr 0.8fr; padding: 64px 56px; } }
.cta-band h2 { font-size: clamp(32px, 4.8vw, 50px); line-height: 1.08; letter-spacing: -0.03em; margin-bottom: 14px; position: relative; z-index: 1; }
.cta-band p { color: #CBD5E1; margin-bottom: 28px; position: relative; z-index: 1; }
.cta-band .stores { position: relative; z-index: 1; }
.cta-band .free { margin-top: 18px; font-size: 14px; color: var(--muted); }
.cta-icon { justify-self: center; position: relative; z-index: 1; text-align: center; }
.cta-icon img { width: 168px; height: 168px; border-radius: 38px; box-shadow: 0 0 80px -6px var(--glow), 0 30px 60px -30px rgba(0,0,0,.9); margin: 0 auto 18px; }
.cta-icon span { color: var(--muted); font-size: 15px; letter-spacing: .04em; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border-soft); padding: 32px 0 40px; font-size: 14px; color: var(--muted); }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 16px 32px; justify-content: space-between; align-items: center; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--text); }

/* ---------- Legal / documentos ---------- */
.doc { max-width: 760px; margin: 0 auto; padding: 56px 16px 88px; position: relative; }
.doc h1 { font-size: clamp(32px, 5vw, 44px); letter-spacing: -0.025em; margin-bottom: 8px; }
.doc .meta { color: var(--muted); font-size: 14px; margin-bottom: 8px; }
.doc .alt-lang { font-size: 14px; margin-bottom: 40px; }
.doc h2 { font-size: 20px; margin: 44px 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--border-soft); }
.doc h3 { font-size: 17px; margin: 28px 0 8px; }
.doc p { margin-bottom: 14px; color: #CBD5E1; }
.doc ul { padding-left: 22px; margin-bottom: 14px; color: #CBD5E1; }
.doc li { margin-bottom: 6px; }
.doc strong { color: var(--text); }
.doc .note { background: rgba(43,212,192,.08); border-left: 3px solid var(--accent); border-radius: 8px; padding: 14px 18px; margin: 20px 0; font-size: 16px; color: #CBD5E1; }
.doc .contact-box { background: var(--surface-solid); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 24px; margin: 8px 0 32px; color: #CBD5E1; }
.doc .contact-box strong { display: block; margin-bottom: 4px; }

/* ---------- 404 ---------- */
.notfound { min-height: 62vh; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 64px 16px; gap: 12px; }
.notfound h1 { font-size: 88px; letter-spacing: -0.04em; background: linear-gradient(90deg, #5EEAD4, #10A697); -webkit-background-clip: text; background-clip: text; color: transparent; }
.notfound p { color: var(--muted); }

.feedback h2 .accent { display: block; }