/* StudioFeel - shared styles
   ==========================
   Single CSS file used by every page on studiofeel.in.
   Modern dark aesthetic, system font stack, mobile-friendly. */

:root {
  --bg:        #0A0A0A;
  --bg-elev:  #141414;
  --bg-card:  #1B1B1B;
  --bg-card2: #232323;
  --fg:       #ECECEC;
  --fg-dim:   #9A9A9A;
  --fg-mute:  #6A6A6A;
  --accent:   #4DA3FF;
  --accent-h: #66B5FF;
  --accent-d: #2C7AC9;
  --border:   #2A2A2A;
  --border-l: #3A3A3A;
  --shadow:   0 8px 24px rgba(0,0,0,0.5);
  --radius:   12px;
  --maxw:     960px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-h); text-decoration: underline; }

/* ------- layout ------- */

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

section { padding: 64px 0; }
section + section { border-top: 1px solid var(--border); }

h1, h2, h3 { font-weight: 600; line-height: 1.25; letter-spacing: -0.01em; }
h1 { font-size: 2.6rem; margin-bottom: 16px; }
h2 { font-size: 1.8rem; margin-bottom: 24px; }
h3 { font-size: 1.2rem; margin-bottom: 12px; }
p  { margin-bottom: 14px; color: var(--fg-dim); }
p strong { color: var(--fg); }

@media (max-width: 600px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  body { font-size: 15px; }
  .hero { padding: 56px 0 48px; }
  .hero .lede { font-size: 1.05rem; }
  section { padding: 48px 0; }
  .container { padding: 0 18px; }
}

ul { padding-left: 1.4em; margin-bottom: 14px; }
li { color: var(--fg-dim); margin-bottom: 6px; }

/* ------- nav ------- */

nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
nav .container {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--fg); font-weight: 600; font-size: 1.05rem;
}
.brand img { width: 28px; height: 28px; }
.nav-links { display: flex; gap: 24px; align-items: center; flex-wrap: wrap; }
.nav-links a { color: var(--fg-dim); font-size: 0.95rem; }
.nav-links a:hover { color: var(--fg); text-decoration: none; }

/* On mobile, hide secondary nav links - users can scroll or use the
   footer / credits links. Keeps the header clean at narrow widths. */
@media (max-width: 720px) {
  .nav-links { display: none; }
  nav .container { justify-content: center; }
}

/* ------- hero ------- */

.hero {
  padding: 88px 0 64px;
  text-align: center;
}
.hero .pill {
  display: inline-block; padding: 4px 12px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 999px; font-size: 0.82rem; color: var(--fg-dim);
  margin-bottom: 24px;
}
.hero h1 { max-width: 720px; margin: 0 auto 18px; }
.hero .lede {
  max-width: 620px; margin: 0 auto 32px;
  font-size: 1.15rem; color: var(--fg-dim);
}
.hero .lede em { color: var(--fg); font-style: normal; }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 500; font-size: 0.98rem;
  cursor: pointer; transition: all 0.15s;
  border: 1px solid transparent;
  text-decoration: none;
  font-family: inherit;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-h); text-decoration: none; }
.btn-ghost {
  background: transparent; color: var(--fg);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--bg-card); text-decoration: none; }

/* ------- hero screenshot ------- */

.screenshot-wrap {
  margin: 48px auto 0; max-width: 720px;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.screenshot-wrap img { width: 100%; display: block; }

/* ------- feature grid ------- */

.features-grid {
  display: grid; gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.feature {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.feature h3 { color: var(--fg); }
.feature p { font-size: 0.95rem; margin: 0; }

/* ------- pricing ------- */

.pricing-grid {
  display: grid; gap: 20px; max-width: 720px; margin: 0 auto;
  grid-template-columns: 1fr 1fr;
}
@media (max-width: 600px) { .pricing-grid { grid-template-columns: 1fr; } }
.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
}
.price-card.featured { border-color: var(--accent); }
.price-card .ribbon {
  display: inline-block; font-size: 0.78rem; color: var(--accent);
  margin-bottom: 10px; font-weight: 500;
}
.price-card .amount { font-size: 2.1rem; font-weight: 600; color: var(--fg); }
.price-card .period { font-size: 0.95rem; color: var(--fg-dim); margin-bottom: 18px; }
.price-card .btn { width: 100%; }

/* ------- before-you-start callout ------- */

.callout {
  background: var(--bg-elev);
  border-left: 3px solid var(--accent);
  padding: 24px 28px;
  border-radius: var(--radius);
  margin: 24px 0;
}
.callout h3 { color: var(--fg); margin-bottom: 14px; }
.callout ul { padding-left: 0; list-style: none; }
.callout li {
  position: relative; padding-left: 28px; margin-bottom: 12px;
}
.callout li::before {
  content: "\2713"; color: var(--accent); position: absolute; left: 6px; top: 0;
  font-weight: bold;
}

/* ------- FAQ ------- */

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 12px;
}
.faq-item summary {
  cursor: pointer;
  font-weight: 500;
  color: var(--fg);
  list-style: none;
  position: relative;
  padding-right: 24px;
}
.faq-item summary::after {
  content: "+"; position: absolute; right: 0; top: 0;
  font-size: 1.4rem; color: var(--fg-dim);
  transition: transform 0.2s;
}
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { margin-top: 12px; margin-bottom: 0; }

/* ------- newsletter ------- */

.newsletter {
  background: var(--bg-elev);
  border-radius: var(--radius);
  padding: 36px;
  text-align: center;
}
.newsletter form {
  display: flex; gap: 8px; max-width: 460px; margin: 16px auto 0;
}
.newsletter input[type=email] {
  flex: 1; padding: 12px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--fg);
  font-size: 1rem;
  font-family: inherit;
}
.newsletter input[type=email]:focus { outline: none; border-color: var(--accent); }

/* ------- credits + footer ------- */

.credits {
  text-align: center; padding: 48px 0;
  color: var(--fg-dim); font-size: 0.95rem;
}
.credits .names { color: var(--fg); margin-bottom: 6px; }
.credits .patent {
  display: inline-block; margin-top: 16px; padding: 4px 12px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 999px; font-size: 0.82rem; color: var(--fg-dim);
}

footer {
  background: var(--bg-elev);
  border-top: 1px solid var(--border);
  padding: 36px 0 24px;
  font-size: 0.9rem;
  color: var(--fg-mute);
}
footer .container {
  display: flex; flex-wrap: wrap; gap: 24px;
  justify-content: space-between; align-items: center;
}
footer .footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
footer .footer-links a { color: var(--fg-dim); font-size: 0.9rem; }

/* ============================================================
   A/B DEMO PLAYER
   ============================================================ */

.demo-intro {
  text-align: center; max-width: 640px; margin: 0 auto 32px;
}
.demo-intro p { color: var(--fg-dim); }

.players-grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.players-grid .section-divider {
  grid-column: 1 / -1;
  background: var(--bg-card2);
  border: 1px solid var(--border-l);
  border-radius: var(--radius);
  padding: 16px 20px;
}
.players-grid .section-divider .label {
  font-weight: 600; color: var(--fg); font-size: 1rem;
  letter-spacing: -0.01em;
}
.players-grid .section-divider .sub {
  color: var(--fg-mute); font-size: 0.85rem; margin-top: 4px;
}

.player {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex; flex-direction: column; gap: 12px;
}
.player .title {
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px; flex-wrap: wrap;
}
.player .title strong {
  color: var(--fg); font-weight: 600; font-size: 0.98rem; line-height: 1.3;
}
.player .badge {
  font-size: 0.72rem; padding: 3px 9px;
  background: var(--bg-card2); border: 1px solid var(--border-l);
  border-radius: 999px; color: var(--fg-dim);
  white-space: nowrap;
}
.player .row {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.player button[data-id="play"] {
  background: var(--accent); color: #fff;
  border: none; border-radius: 6px;
  padding: 8px 18px; font-weight: 500; cursor: pointer;
  font-size: 0.95rem; min-width: 86px;
  font-family: inherit;
  transition: background 0.15s;
}
.player button[data-id="play"]:hover { background: var(--accent-h); }
.player button[data-id="play"]:disabled { opacity: 0.5; cursor: wait; }

.player .toggle {
  display: inline-flex; align-items: center; gap: 8px;
  cursor: pointer; user-select: none;
  color: var(--fg-dim); font-size: 0.92rem;
}
.player .toggle input[type=checkbox] {
  appearance: none;
  width: 36px; height: 20px;
  background: var(--bg-card2);
  border: 1px solid var(--border-l);
  border-radius: 999px;
  position: relative;
  cursor: pointer;
  transition: background 0.15s;
}
.player .toggle input[type=checkbox]::before {
  content: ""; position: absolute;
  width: 14px; height: 14px;
  background: var(--fg-dim);
  border-radius: 50%;
  top: 2px; left: 2px;
  transition: all 0.15s;
}
.player .toggle input[type=checkbox]:checked {
  background: var(--accent-d); border-color: var(--accent);
}
.player .toggle input[type=checkbox]:checked::before {
  background: #fff; left: 18px;
}
.player .toggle input[type=checkbox]:disabled { opacity: 0.4; cursor: not-allowed; }

.player .time {
  color: var(--fg-mute); font-size: 0.86rem;
  font-variant-numeric: tabular-nums;
  margin-left: auto;
}

.player input[type="range"].seek {
  flex: 1; appearance: none; background: transparent;
  height: 22px; cursor: pointer;
}
.player input[type="range"].seek:disabled { cursor: not-allowed; opacity: 0.5; }
.player input[type="range"].seek::-webkit-slider-runnable-track {
  height: 4px; border-radius: 2px;
  background: linear-gradient(to right,
    var(--accent) 0%, var(--accent) var(--pct,0%),
    var(--border-l) var(--pct,0%), var(--border-l) 100%);
}
.player input[type="range"].seek::-moz-range-track {
  height: 4px; border-radius: 2px; background: var(--border-l);
}
.player input[type="range"].seek::-webkit-slider-thumb {
  appearance: none; width: 14px; height: 14px;
  background: #fff; border-radius: 50%;
  margin-top: -5px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.4);
}
.player input[type="range"].seek::-moz-range-thumb {
  width: 14px; height: 14px;
  background: #fff; border-radius: 50%; border: none;
  box-shadow: 0 1px 4px rgba(0,0,0,0.4);
}

.player .note {
  color: var(--fg-mute); font-size: 0.8rem; line-height: 1.4;
}

/* ------- legal pages (privacy / terms / refund / about) ------- */

.legal-page {
  max-width: 720px;
  margin: 0 auto; padding: 64px 24px;
}
.legal-page h1 { font-size: 2rem; margin-bottom: 8px; }
.legal-page .updated {
  color: var(--fg-mute); font-size: 0.9rem; margin-bottom: 32px;
}
.legal-page h2 { font-size: 1.3rem; margin-top: 32px; margin-bottom: 12px; }
.legal-page p { margin-bottom: 14px; }
.legal-page ul { margin-bottom: 14px; }