/*
 * Loudspots — design system
 * A calm, low-glare dark theme for sound-sensitive viewers.
 */

:root {
  --bg:          #0F1419;
  --bg-elev:     #151B22;
  --card:        #1A2028;
  --card-hover:  #202731;
  --border:      #2A3240;
  --border-soft: #222935;

  --ink:         #E8EAED;
  --ink-soft:    #AEB6C1;
  --ink-mute:    #7A8594;

  --accent:      #7FB3A3;
  --accent-soft: #A8CFC3;
  --accent-deep: #4F8A7A;

  --pass:        #7FB3A3;
  --warn:        #E0B97D;
  --fail:        #D98880;

  --focus:       #A8CFC3;

  --radius-sm:   6px;
  --radius:      12px;
  --radius-lg:   18px;

  --shadow-sm:   0 1px 2px rgba(0,0,0,.3);
  --shadow:      0 6px 24px rgba(0,0,0,.35);

  --space-1: .25rem;
  --space-2: .5rem;
  --space-3: .75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-10: 4.5rem;

  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --max-w: 64rem;
  --max-w-prose: 42rem;
}

/* ---------- reset ---------- */

*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  tab-size: 4;
  color-scheme: dark;
}

body {
  min-height: 100dvh;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 1200px 600px at 50% -200px, rgba(127,179,163,.08), transparent 60%),
    radial-gradient(ellipse 800px 400px at 80% 100%, rgba(127,179,163,.04), transparent 60%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  display: flex;
  flex-direction: column;
}

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

a {
  color: var(--accent-soft);
  text-decoration-color: rgba(168, 207, 195, .35);
  text-underline-offset: 3px;
  transition: color .15s ease, text-decoration-color .15s ease;
}
a:hover { color: var(--accent); text-decoration-color: var(--accent); }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0s !important;
    transition-duration: 0s !important;
  }
}

/* ---------- typography ---------- */

h1, h2, h3, h4 {
  font-weight: 650;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
}

h1 { font-size: clamp(2rem, 4.5vw, 3.25rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 2.5vw, 1.875rem); }
h3 { font-size: 1.2rem; }

p { color: var(--ink-soft); }
.lead { font-size: 1.125rem; color: var(--ink-soft); }

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: #0F1419;
  padding: .6rem 1rem;
  border-radius: 0 0 var(--radius-sm) 0;
  font-weight: 600;
  z-index: 100;
}
.skip-link:focus { left: 0; }

.site-header {
  padding: var(--space-5) var(--space-5);
  border-bottom: 1px solid var(--border-soft);
  background: rgba(15, 20, 25, .6);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .625rem;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.brand:hover { color: var(--ink); }

.brand__mark {
  width: 28px;
  height: 28px;
  display: inline-block;
  flex-shrink: 0;
}

.site-main {
  flex: 1;
  padding: var(--space-6) var(--space-5) var(--space-8);
}

.container {
  max-width: var(--max-w);
  margin-inline: auto;
}

.container--prose {
  max-width: var(--max-w-prose);
  margin-inline: auto;
}

.site-footer {
  margin-top: var(--space-10);
  padding: var(--space-6) var(--space-5);
  border-top: 1px solid var(--border-soft);
  color: var(--ink-mute);
  font-size: .9rem;
}
.site-footer__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}
.site-footer a { color: var(--ink-soft); }
.site-footer__support img { height: 40px; width: auto; border-radius: 6px; }

/* ---------- sections ---------- */

.hero {
  text-align: center;
  padding-block: var(--space-8) var(--space-6);
}

.hero__eyebrow {
  display: inline-block;
  font-size: .8125rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-3);
  font-weight: 600;
}

.hero__title { margin-bottom: var(--space-4); }
.hero__subtitle {
  font-size: 1.125rem;
  color: var(--ink-soft);
  max-width: 36rem;
  margin-inline: auto;
  margin-bottom: var(--space-6);
}

.section {
  padding-block: var(--space-8);
}
.section + .section { border-top: 1px solid var(--border-soft); }

.section__header {
  text-align: center;
  margin-bottom: var(--space-6);
}
.section__header p {
  margin-top: var(--space-2);
  color: var(--ink-mute);
}

/* ---------- form ---------- */

.form {
  max-width: 38rem;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.input-group {
  display: flex;
  gap: var(--space-2);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .4rem;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.input-group:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(127,179,163,.18);
}

.input-group .field {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: 0;
  padding: .75rem .875rem;
  font-size: 1rem;
  color: var(--ink);
}
.input-group .field::placeholder { color: var(--ink-mute); }
.input-group .field:focus { outline: none; }

@media (max-width: 30rem) {
  .input-group { flex-direction: column; }
}

.btn {
  display: inline-block;
  appearance: none;
  border: 0;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  padding: .75rem 1.25rem;
  border-radius: 10px;
  transition: transform .12s ease, background-color .15s ease, color .15s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--accent);
  color: #0F1419;
}
.btn--primary:hover { background: var(--accent-soft); }

.btn--ghost {
  background: transparent;
  color: var(--ink-soft);
  border: 1px solid var(--border);
}
.btn--ghost:hover { color: var(--ink); border-color: var(--accent); }

.form__helper {
  font-size: .85rem;
  color: var(--ink-mute);
  text-align: center;
}

.errors {
  background: rgba(217,136,128,.08);
  border: 1px solid rgba(217,136,128,.3);
  border-radius: var(--radius);
  padding: var(--space-3) var(--space-4);
  color: #F0B8B3;
  font-size: .95rem;
}
.errors p + p { margin-top: .25rem; }

/* ---------- cards / steps / faq ---------- */

.grid {
  display: grid;
  gap: var(--space-4);
}
.grid--3 { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 42rem) {
  .grid--3 { grid-template-columns: 1fr; }
}

.card {
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: var(--space-5);
}

.step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  background: rgba(127,179,163,.12);
  color: var(--accent);
  font-weight: 700;
  margin-bottom: var(--space-3);
}
.step h3 { margin-bottom: var(--space-2); }
.step p { font-size: .95rem; }

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  justify-content: center;
  margin-top: var(--space-4);
}
.tag {
  background: rgba(127,179,163,.08);
  border: 1px solid rgba(127,179,163,.2);
  color: var(--accent-soft);
  padding: .375rem .75rem;
  border-radius: 999px;
  font-size: .85rem;
}

.faq details {
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-3);
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  color: var(--accent);
  font-weight: 700;
  font-size: 1.25rem;
  line-height: 1;
}
.faq details[open] summary::after { content: "\2212"; }
.faq details > p { margin-top: var(--space-3); }

/* ---------- analysis / results ---------- */

.analysis-header { margin-bottom: var(--space-5); }
.analysis-header h1 { font-size: clamp(1.5rem, 3vw, 2rem); }
.analysis-header .analysis-url {
  word-break: break-all;
  color: var(--ink-mute);
  font-size: .9rem;
  margin-top: .25rem;
}

.video-embed {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
  border: 1px solid var(--border-soft);
  margin-bottom: var(--space-5);
}
.video-embed iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.verdict {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5);
  border-radius: var(--radius);
  border: 1px solid var(--border-soft);
  background: var(--card);
  margin-bottom: var(--space-5);
}
.verdict--pass {
  border-color: rgba(127,179,163,.4);
  background: linear-gradient(180deg, rgba(127,179,163,.08), rgba(127,179,163,.02));
}
.verdict--fail {
  border-color: rgba(217,136,128,.35);
  background: linear-gradient(180deg, rgba(217,136,128,.07), rgba(217,136,128,.02));
}

.verdict__icon {
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
}
.verdict--pass .verdict__icon {
  background: rgba(127,179,163,.15);
  color: var(--pass);
}
.verdict--fail .verdict__icon {
  background: rgba(217,136,128,.15);
  color: var(--fail);
}
.verdict__icon svg { width: 22px; height: 22px; }

.verdict__body h2 { font-size: 1.25rem; margin-bottom: .125rem; }
.verdict__body p { color: var(--ink-soft); font-size: .95rem; }

.timestamps-heading {
  font-size: .85rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: var(--space-3);
  font-weight: 600;
}

.timestamps {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(7rem, 1fr));
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}
.timestamp-btn {
  appearance: none;
  width: 100%;
  text-align: left;
  background: var(--card);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: .75rem 1rem;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: .95rem;
  display: flex;
  align-items: center;
  gap: .5rem;
  transition: border-color .15s ease, background-color .15s ease, color .15s ease;
}
.timestamp-btn::before {
  content: "\25B8";
  color: var(--accent);
  font-size: .85rem;
}
.timestamp-btn:hover {
  background: var(--card-hover);
  border-color: var(--accent);
  color: var(--ink);
}

.loader {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
}
.loader__pulse {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  position: relative;
  flex-shrink: 0;
}
.loader__pulse::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--accent);
  opacity: .6;
  animation: pulse 1.8s ease-out infinite;
}
@keyframes pulse {
  0%   { transform: scale(1); opacity: .6; }
  100% { transform: scale(2.4); opacity: 0; }
}
.loader__body strong { color: var(--ink); display: block; margin-bottom: .125rem; }
.loader__body span { color: var(--ink-mute); font-size: .9rem; }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: .375rem;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: .95rem;
}
.back-link::before { content: "\2190"; color: var(--accent); }
.back-link:hover { color: var(--ink); }

/* ---------- utilities ---------- */

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.center-text { text-align: center; }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mt-6 { margin-top: var(--space-6); }
.mb-5 { margin-bottom: var(--space-5); }