/* ==========================================================================
   Athletx — Stylesheet
   Design concept: "Ascent" — angular, peak-shaped motifs echo the logo's
   triangular mark. Near-black canvas, neon-green accent used with
   restraint on interactive/important elements only.
   ========================================================================== */

/* ---- Design tokens ---- */
:root {
  /* Color */
  --bg: #050505;            /* base canvas */
  --bg-surface: #111111;    /* cards, nav, footer */
  --bg-surface-2: #1a1a1a;  /* elevated surface / hover */
  --accent: #08fd8e;        /* neon accent */
  --accent-soft: rgba(8, 253, 142, 0.12);
  --accent-glow: rgba(8, 253, 142, 0.35);
  --ink: #f4f4f4;           /* primary text */
  --ink-muted: #a3a3a3;     /* secondary text */
  --ink-faint: #737373;     /* tertiary / labels */
  --line: rgba(255, 255, 255, 0.1);

  /* Type */
  --font-display: 'Poppins', 'Segoe UI', system-ui, sans-serif;
  --font-body: 'Inter', 'Segoe UI', system-ui, sans-serif;

  /* Layout */
  --container: 1180px;
  --radius-sm: 6px;
  --nav-h: 76px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .device { animation: none; }
  .reveal-ready [data-reveal] { opacity: 1; transform: none; }
}

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

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

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

ul { list-style: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.01em;
}

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

/* Visible keyboard focus, everywhere */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}

.btn-accent {
  background: var(--accent);
  color: #062b16;
  box-shadow: 0 0 0 rgba(8, 253, 142, 0);
}
.btn-accent img{
  width: 20px;
}

.btn-accent:hover {
  box-shadow: 0 0 28px var(--accent-glow);
  transform: translateY(-2px);
}

.btn-accent svg { flex-shrink: 0; }

.app-store-badge {
  display: inline-flex;
  align-items: center;
  line-height: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.app-store-badge img {
  height: 50px;
  width: auto;
  display: block;
}

.app-store-badge:hover {
  opacity: 0.85;
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
  padding: 12px 22px;
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-block { width: 100%; justify-content: center; }

/* ---- Navbar ---- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(5, 5, 5, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.brand img {
  width: auto;
  height: 36px;
  border-radius: 9px;
}

.brand .x { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--ink-muted);
  position: relative;
  padding: 6px 0;
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--ink);
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: var(--accent);
  transition: width 0.25s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-cta { display: flex; align-items: center; gap: 20px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.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); }

/* ---- Hero ---- */
.hero {
  position: relative;
  padding: 96px 0 140px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 60% 50% at 80% 10%, var(--accent-soft), transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, #000000 100%);
}

/* Peak motif — echoes the logo's triangular mark, drawn with pure CSS */
.peak-field {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
}

.peak {
  position: absolute;
  bottom: -6%;
  width: 0;
  height: 0;
  border-left: 140px solid transparent;
  border-right: 140px solid transparent;
  border-bottom: 220px solid #173d18;
}

.peak::after {
  content: '';
  position: absolute;
  left: -70px;
  top: 90px;
  width: 0;
  height: 0;
  border-left: 70px solid transparent;
  border-right: 70px solid transparent;
  border-bottom: 130px solid var(--accent-soft);
}

.peak.p1 { left: -4%; opacity: 0.9; }
.peak.p2 { left: 18%; transform: scale(0.7); opacity: 0.6; }
.peak.p3 { left: 55%; transform: scale(1.3); opacity: 0.5; }
.peak.p4 { left: 82%; transform: scale(0.85); opacity: 0.75; }

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 60px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.eyebrow::before {
  content: '';
  width: 7px;
  height: 7px;
  background: var(--accent);
  border-radius: 1px;
  transform: rotate(45deg);
  box-shadow: 0 0 10px var(--accent);
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.75rem);
  color: var(--ink);
  margin-bottom: 22px;
}

.hero h1 .accent-word {
  color: var(--accent);
}

.hero p.lead {
  font-size: 1.1rem;
  color: var(--ink-muted);
  max-width: 46ch;
  margin-bottom: 36px;
}

.hero-actions { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; margin-bottom: 44px; }

.hero-stats {
  display: flex;
  gap: 36px;
}

.hero-stats div strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--ink);
}

.hero-stats div span {
  font-size: 0.85rem;
  color: var(--ink-faint);
}

/* ---- Hero visual: original app-preview composition ---- */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.device {
  position: relative;
  width: 300px;
  animation: device-float 4s ease-in-out infinite alternate;
}

@keyframes device-float {
  from { transform: translateY(-10px); }
  to { transform: translateY(10px); }
}

.device-notch {
  width: 60px;
  height: 6px;
  background: rgba(244, 249, 244, 0.15);
  border-radius: 4px;
  margin: 0 auto 18px;
}

.device-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }

.device-row .greeting { font-size: 0.78rem; color: var(--ink-faint); }
.device-row .greeting strong { display: block; color: var(--ink); font-size: 0.92rem; font-family: var(--font-display); }

.ring {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 3px solid var(--accent);
  border-right-color: rgba(244,249,244,0.15);
  border-bottom-color: rgba(244,249,244,0.15);
  transform: rotate(45deg);
}

.device-card {
  background: rgba(244, 249, 244, 0.05);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 14px;
}

.device-card .label { font-size: 0.72rem; color: var(--ink-faint); margin-bottom: 10px; }

.progress-track {
  height: 8px;
  background: rgba(244, 249, 244, 0.08);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-fill {
  height: 100%;
  width: 72%;
  background: var(--accent);
  border-radius: 4px;
  box-shadow: 0 0 12px var(--accent-glow);
}

.device-card .fine { font-size: 0.72rem; color: var(--ink-muted); }

.chip-row { display: flex; gap: 8px; }
.chip {
  flex: 1;
  height: 46px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--bg-surface-2), var(--bg-surface));
  border: 1px solid var(--line);
}

.device-glow {
  position: absolute;
  inset: -40px;
  background: radial-gradient(circle at 50% 40%, var(--accent-glow), transparent 65%);
  filter: blur(30px);
  opacity: 0.35;
  z-index: -1;
}

/* ---- Section shared ---- */
section { padding: 100px 0; position: relative; }

.section-head {
  max-width: 640px;
  margin-bottom: 56px;
}

.section-head h2 {
  font-size: clamp(1.8rem, 3.4vw, 2.5rem);
  color: var(--ink);
  margin-bottom: 14px;
}

.section-head p {
  color: var(--ink-muted);
  font-size: 1.05rem;
}

/* ---- Features ---- */
.features { background: var(--bg); }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--line);
  padding: 30px 26px;
  /* angular cut corner — echoes the logo's faceted geometry */
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.feature-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 32px -8px var(--accent-glow);
  transform: translateY(-4px);
}

/* Scroll reveals are enabled only after JavaScript has prepared the elements. */
.reveal-ready [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 650ms ease, transform 650ms cubic-bezier(0.2, 0.7, 0.2, 1);
  transition-delay: var(--reveal-delay, 0ms);
}

.reveal-ready [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-ready .feature-card.is-visible:hover { transform: translateY(-4px); }

.feature-icon {
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  border-radius: 10px;
  margin-bottom: 20px;
  color: var(--accent);
}

.feature-card h3 {
  font-size: 1.1rem;
  color: var(--ink);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--ink-muted);
}

/* ---- How it works ---- */
.how { background: linear-gradient(180deg, #000000, var(--bg)); }

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}

.steps::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 12%;
  right: 12%;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--line) 0 10px, transparent 10px 20px);
  z-index: 0;
}

.step { position: relative; z-index: 1; }

.step-peak {
  width: 56px;
  height: 56px;
  margin-bottom: 22px;
  color: var(--bg);
  background: var(--accent);
  clip-path: polygon(50% 8%, 92% 88%, 8% 88%);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  padding-bottom: 10px;
  box-shadow: 0 0 24px var(--accent-glow);
}

.step h3 { font-size: 1.15rem; margin-bottom: 8px; }
.step p { color: var(--ink-muted); font-size: 0.92rem; max-width: 30ch; }

/* ---- CTA ---- */
.cta {
  background: var(--bg-surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, var(--accent-soft), transparent 65%);
  pointer-events: none;
}

.cta .container { position: relative; z-index: 1; }

.cta h2 {
  font-size: clamp(1.9rem, 3.6vw, 2.8rem);
  max-width: 20ch;
  margin: 0 auto 16px;
}

.cta p {
  color: var(--ink-muted);
  font-size: 1.05rem;
  max-width: 50ch;
  margin: 0 auto 36px;
}

/* ---- Footer ---- */
.site-footer {
  background: #000000;
  border-top: 1px solid var(--line);
  padding: 56px 0 28px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
}

.footer-brand p {
  color: var(--ink-faint);
  font-size: 0.9rem;
  margin-top: 12px;
  max-width: 32ch;
}

.footer-links { display: flex; gap: 64px; flex-wrap: wrap; }

.footer-col h4 {
  font-size: 0.82rem;
  color: var(--ink-faint);
  margin-bottom: 14px;
  font-weight: 600;
}

.footer-col a {
  display: block;
  color: var(--ink-muted);
  font-size: 0.92rem;
  margin-bottom: 10px;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--ink-faint);
}

/* ---- Privacy page ---- */
.policy {
  padding: 72px 0 120px;
}

.policy .container { max-width: 780px; }

.policy-header {
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line);
}

.policy-header h1 {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  margin-bottom: 12px;
}

.policy-header p { color: var(--ink-faint); font-size: 0.92rem; }

.policy-section { margin-bottom: 40px; }

.policy-section h2 {
  font-size: 1.25rem;
  color: var(--accent);
  margin-bottom: 14px;
  padding-left: 16px;
  border-left: 2px solid var(--accent);
}

.policy-section p,
.policy-section li {
  color: var(--ink-muted);
  font-size: 0.98rem;
  margin-bottom: 12px;
}

.policy-section ul { padding-left: 20px; }
.policy-section li { list-style: disc; margin-bottom: 8px; }

.policy-section a { color: var(--accent); border-bottom: 1px solid transparent; }
.policy-section a:hover { border-bottom-color: var(--accent); }

/* ---- Responsive ---- */
@media (max-width: 980px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { order: -1; margin-bottom: 20px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; gap: 48px; }
  .steps::before { display: none; }
  .footer-top { flex-direction: column; }
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--line);
    padding: 24px;
    gap: 20px;
  }
  .nav-cta .app-store-badge img { height: 32px; }
  .nav-toggle { display: flex; }
  .hero { padding: 56px 0 90px; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .feature-grid { grid-template-columns: 1fr; }
  section { padding: 72px 0; }
  .footer-links { gap: 36px; }
}

@media (max-width: 420px) {
  .device { width: 100%; max-width: 260px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}