@font-face {
  font-family: "NERV";
  src: url("/fonts/nerv.woff") format("woff");
  font-display: swap;
}

@font-face {
  font-family: "NERV Standard";
  src: url("/fonts/nervstandard.woff") format("woff");
  font-display: swap;
}

:root {
  color-scheme: dark;
  --primary: #ff3838;
  --primary-strong: #ff1717;
  --primary-soft: rgba(255, 56, 56, 0.13);
  --background: #000;
  --surface: #190000;
  --surface-raised: #250707;
  --surface-hover: #340b0b;
  --text: #fefefe;
  --muted: #c2aaaa;
  --border: #522020;
  --success: #4fca71;
  --warning: #ffbd46;
  --danger: #ff6868;
  --shadow: 0 16px 48px rgba(0, 0, 0, 0.28);
  --radius: 10px;
  --font-body: "NERV Standard", Inter, ui-sans-serif, system-ui, sans-serif;
  --font-display: "NERV", "NERV Standard", Inter, ui-sans-serif, sans-serif;
}

:root[data-theme="light"] {
  color-scheme: light;
  --background: #fff;
  --surface: #f5eeee;
  --surface-raised: #fff;
  --surface-hover: #ffe8e8;
  --text: #170606;
  --muted: #6e5555;
  --border: #e5caca;
  --shadow: 0 16px 48px rgba(60, 0, 0, 0.1);
}

* { box-sizing: border-box; }

html { min-height: 100%; }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 50% -15%, rgba(255, 56, 56, 0.17), transparent 38rem),
    var(--background);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
}

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

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  min-height: 70px;
  padding: 8px max(20px, calc((100vw - 1120px) / 2));
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--background) 88%, transparent);
  backdrop-filter: blur(16px);
}

.nav-brand { display: flex; align-items: center; gap: 11px; text-decoration: none; }
.nav-logo { width: 46px; height: 46px; object-fit: contain; }
.nav-title { color: var(--primary); font-family: var(--font-display); font-size: 1.08rem; letter-spacing: .045em; }
.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-link, .theme-button {
  min-height: 40px;
  padding: 8px 13px;
  border: 1px solid transparent;
  border-radius: 8px;
  color: var(--muted);
  background: transparent;
  text-decoration: none;
  cursor: pointer;
}
.nav-link:hover, .nav-link.active, .theme-button:hover { color: var(--text); background: var(--primary-soft); border-color: var(--border); }
.nav-link.active { color: var(--primary); }
.theme-button { width: 40px; padding: 6px; margin-left: 4px; }

.container { width: min(760px, calc(100% - 32px)); margin: 0 auto; padding: 44px 0 72px; }
.container.wide { width: min(980px, calc(100% - 32px)); }

h1, h2, h3, .card-title, .eyebrow { font-family: var(--font-display); line-height: 1.18; }
h1 { margin: 0 0 28px; font-size: clamp(2rem, 6vw, 3.35rem); letter-spacing: .02em; }
h2 { margin: 0; font-size: 1.4rem; }
p { margin: 0; }
.primary { color: var(--primary); }
.muted { color: var(--muted); }
.hidden { display: none !important; }
.spacer { margin-top: 16px; }
.divider { height: 1px; margin: 22px 0; border: 0; background: var(--border); }

.hero { padding: 8vh 0 4vh; text-align: center; }
.hero-mark { width: 104px; height: 104px; margin-bottom: 18px; object-fit: contain; filter: drop-shadow(0 0 28px rgba(255, 56, 56, .26)); }
.hero h1 { margin-bottom: 12px; color: var(--primary); font-size: clamp(3rem, 11vw, 6.4rem); }
.hero > p { color: var(--muted); font-size: 1.1rem; }
.tool-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 40px; text-align: left; }
.tool-card {
  position: relative;
  min-height: 220px;
  padding: 25px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: linear-gradient(145deg, var(--surface-raised), var(--surface));
  box-shadow: var(--shadow);
  text-decoration: none;
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.tool-card:hover { transform: translateY(-3px); border-color: var(--primary); box-shadow: 0 18px 60px rgba(255, 20, 20, .13); }
.tool-card::after { content: "→"; position: absolute; right: 24px; bottom: 18px; color: var(--primary); font-size: 1.6rem; }
.tool-icon { margin-bottom: 24px; font-size: 2.7rem; }
.tool-card h2 { margin-bottom: 9px; color: var(--text); }
.tool-card p { color: var(--muted); }

.card, .accordion {
  margin-bottom: 16px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 8px 28px rgba(0, 0, 0, .08);
}
.card-title { margin-bottom: 15px; color: var(--text); font-size: 1.03rem; letter-spacing: .02em; }
.eyebrow { margin-bottom: 8px; color: var(--primary); font-size: .72rem; letter-spacing: .11em; text-transform: uppercase; }

label { display: block; margin-bottom: 7px; color: var(--muted); font-size: .91rem; }
input[type="text"], input[type="url"], input[type="number"], select {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 7px;
  outline: none;
  color: var(--text);
  background: var(--background);
  transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
input:disabled, select:disabled { opacity: .55; cursor: not-allowed; }
input[type="checkbox"], input[type="radio"] { width: 17px; height: 17px; margin: 0; accent-color: var(--primary); }
.check-label { display: flex; align-items: center; gap: 9px; min-height: 30px; margin: 3px 0; color: var(--text); cursor: pointer; }
.field-help { margin-top: 7px; color: var(--muted); font-size: .82rem; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.upload-zone {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 176px;
  padding: 28px;
  border: 1.5px dashed var(--border);
  border-radius: 9px;
  text-align: center;
  background: color-mix(in srgb, var(--background) 65%, transparent);
  cursor: pointer;
  transition: border-color .18s, background .18s;
}
.upload-zone:hover, .upload-zone.dragover { border-color: var(--primary); background: var(--primary-soft); }
.upload-zone input { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; }
.upload-icon { margin-bottom: 9px; font-size: 2.3rem; }
.upload-text { color: var(--muted); }
.upload-text strong { color: var(--text); }

.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.metric { min-width: 0; padding: 15px; border: 1px solid var(--border); border-radius: 8px; background: var(--background); }
.metric-label { margin-bottom: 5px; color: var(--muted); font-size: .78rem; }
.metric-value { overflow: hidden; color: var(--text); font-family: var(--font-display); font-size: 1.15rem; text-overflow: ellipsis; white-space: nowrap; }
.metric-value.success { color: var(--success); }

.presets { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.preset-btn, .choice-chip {
  min-height: 48px;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text);
  background: var(--background);
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .15s;
}
.preset-btn:hover, .choice-chip:hover { border-color: var(--primary); background: var(--primary-soft); transform: translateY(-1px); }
.preset-btn small { display: block; margin-top: 3px; color: var(--muted); font-size: .7rem; }
.choice-chip.selected { border-color: var(--primary); color: var(--primary); background: var(--primary-soft); }
.choices { display: flex; flex-wrap: wrap; gap: 8px; }

.accordion { padding: 0; overflow: hidden; }
.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 54px;
  padding: 13px 18px;
  border: 0;
  color: var(--text);
  background: transparent;
  font-family: var(--font-display);
  text-align: left;
  cursor: pointer;
}
.accordion-header:hover { background: var(--surface-hover); }
.accordion-arrow { color: var(--muted); transition: transform .18s; }
.accordion.open .accordion-arrow { transform: rotate(90deg); }
.accordion-body { display: none; padding: 2px 18px 18px; }
.accordion.open .accordion-body { display: block; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 11px 18px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  background: var(--surface-raised);
  font-family: var(--font-display);
  text-decoration: none;
  cursor: pointer;
  transition: filter .15s, transform .15s, opacity .15s;
}
.btn:hover:not(:disabled) { filter: brightness(1.12); transform: translateY(-1px); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary { width: 100%; border-color: var(--primary); color: #fff; background: var(--primary-strong); }
.btn-download { width: 100%; margin-top: 18px; border-color: var(--primary); color: #fff; background: var(--primary-strong); }
.btn-cancel { width: 100%; border-color: var(--danger); color: var(--danger); background: transparent; }

.progress-label { display: flex; justify-content: space-between; margin-bottom: 7px; color: var(--muted); font-size: .88rem; }
.progress-track { width: 100%; height: 9px; overflow: hidden; border-radius: 999px; background: var(--background); }
.progress-bar { width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--primary-strong), #ff7a38); transition: width .25s ease; }

.alert { padding: 13px 15px; border: 1px solid; border-radius: 8px; font-size: .91rem; }
.alert-info { border-color: #2e6382; color: #c4eaff; background: rgba(30, 111, 160, .14); }
.alert-success { border-color: #267b40; color: #c7fbd5; background: rgba(50, 170, 82, .13); }
.alert-warning { border-color: #8a6623; color: #ffe2aa; background: rgba(205, 145, 38, .13); }
.alert-error { border-color: #9b3333; color: #ffc5c5; background: rgba(210, 40, 40, .13); }

.range-pair { position: relative; height: 32px; margin: 15px 0 4px; }
.range-pair::before, .range-fill { position: absolute; top: 14px; right: 0; left: 0; height: 4px; border-radius: 99px; content: ""; }
.range-pair::before { background: var(--border); }
.range-fill { right: auto; background: var(--primary); }
.range-pair input[type="range"] {
  position: absolute;
  inset: 4px 0 auto;
  width: 100%;
  height: 24px;
  margin: 0;
  pointer-events: none;
  appearance: none;
  background: transparent;
}
.range-pair input[type="range"]::-webkit-slider-thumb { width: 18px; height: 18px; border: 2px solid var(--background); border-radius: 50%; background: var(--primary); pointer-events: auto; appearance: none; cursor: grab; }
.range-pair input[type="range"]::-moz-range-thumb { width: 15px; height: 15px; border: 2px solid var(--background); border-radius: 50%; background: var(--primary); pointer-events: auto; cursor: grab; }
.range-labels { display: flex; justify-content: space-between; color: var(--muted); font-size: .82rem; }

.player { overflow: hidden; border: 1px solid var(--border); border-radius: 9px; background: #050505; }
.player-stage { position: relative; aspect-ratio: 16 / 9; background: #000; }
.player-stage video { width: 100%; height: 100%; object-fit: contain; }
.player-badge { position: absolute; top: 10px; right: 10px; padding: 4px 7px; border-radius: 4px; color: #fff; background: rgba(0,0,0,.65); font: 12px ui-sans-serif, sans-serif; }
.player video[controls] { display: block; width: 100%; max-height: 550px; background: #000; }
.comparison { position: relative; aspect-ratio: 16/9; overflow: hidden; background: #000; touch-action: none; }
.comparison video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
.comparison .after { clip-path: inset(0 0 0 50%); }
.comparison-divider { position: absolute; top: 0; bottom: 0; left: 50%; width: 2px; background: #fff; cursor: ew-resize; z-index: 3; }
.comparison-handle { position: absolute; top: 50%; left: 50%; display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; color: #111; background: #fff; transform: translate(-50%, -50%); }
.comparison-label { position: absolute; top: 12px; z-index: 2; padding: 4px 8px; border-radius: 4px; color: #fff; background: rgba(0,0,0,.62); font: 12px ui-sans-serif, sans-serif; }
.comparison-label.left { left: 12px; }
.comparison-label.right { right: 12px; }
.comparison-controls { display: flex; align-items: center; gap: 10px; padding: 9px 11px; color: #fff; background: #1c1c1c; }
.comparison-controls button { width: 32px; border: 0; color: #fff; background: none; cursor: pointer; }
.comparison-controls input { flex: 1; accent-color: var(--primary); }
.comparison-time { min-width: 86px; font: 12px ui-monospace, monospace; text-align: center; }

.format-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.radio-card { display: flex; align-items: center; gap: 10px; min-height: 50px; padding: 11px; border: 1px solid var(--border); border-radius: 8px; color: var(--text); background: var(--background); cursor: pointer; }
.radio-card:has(input:checked) { border-color: var(--primary); background: var(--primary-soft); }
.thumbnail-row { display: grid; grid-template-columns: minmax(180px, 44%) 1fr; gap: 16px; align-items: center; }
.thumbnail-row img { width: 100%; border-radius: 7px; background: #000; }
.thumbnail-copy h3 { margin: 0 0 7px; font-size: 1.1rem; }
.thumbnail-copy p { color: var(--muted); font-size: .9rem; }
.video-embed { width: 100%; aspect-ratio: 16/9; border: 0; border-radius: 8px; background: #000; }

.nerv-toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 999;
  padding: 15px 25px;
  border: 1px solid #e94560;
  border-radius: 8px;
  color: #e94560;
  background: linear-gradient(135deg, #1a1a2e, #16213e);
  box-shadow: 0 4px 20px rgba(233, 69, 96, .3);
  font-family: ui-monospace, monospace;
  text-align: center;
  transform: translateX(-50%);
  animation: toast-in .35s ease;
  transition: opacity .4s;
}
@keyframes toast-in { from { opacity: 0; transform: translate(-50%, 16px); } }

@media (max-width: 720px) {
  .nav { padding-inline: 12px; }
  .nav-title { display: none; }
  .nav-link { padding-inline: 9px; font-size: .82rem; }
  .container { width: min(100% - 22px, 760px); padding-top: 28px; }
  .tool-grid, .grid-2, .thumbnail-row { grid-template-columns: 1fr; }
  .tool-card { min-height: 185px; }
  .presets { grid-template-columns: repeat(2, 1fr); }
  .metrics { grid-template-columns: 1fr; }
  .metric-value { white-space: normal; }
  .comparison-time { display: none; }
}