/* tinv PWA — editorial / Swiss monochrome player.
   Strictly grayscale, zero radius. Hierarchy comes from a type scale, weight
   contrast, hairline rules, and mono micro-labels, not color. */

:root {
  /* Tinted neutrals (OKLCH, a whisper of warmth so it isn't a clinical void).
     Reads as pure black & white; the chroma is below perceptual color. */
  --ink-0:  oklch(0.08 0.004 60);   /* page */
  --ink-1:  oklch(0.12 0.004 60);   /* raised surface */
  --ink-2:  oklch(0.16 0.004 60);   /* hover surface */
  --line:   oklch(1 0 0 / 0.13);    /* hairline */
  --line-2: oklch(1 0 0 / 0.07);    /* faint rule */
  --fg:     oklch(0.97 0.003 80);   /* primary text */
  --fg-2:   oklch(0.97 0.003 80 / 0.62);  /* secondary */
  --fg-3:   oklch(0.97 0.003 80 / 0.40);  /* tertiary / labels */
  --paper:  oklch(0.97 0.003 80);   /* inverted block bg */
  --paper-ink: oklch(0.10 0.004 60);/* text on inverted */

  --sans: "Inter", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", monospace;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);  /* ease-out-quint */
  --pad: clamp(16px, 4vw, 40px);

  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--ink-0);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body { display: flex; flex-direction: column; min-height: 100vh; }

::selection { background: var(--paper); color: var(--paper-ink); }

button { font: inherit; color: inherit; }

/* ============================ HEADER ============================ */

.app-header {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding: 14px var(--pad);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in oklab, var(--ink-0) 88%, transparent);
  backdrop-filter: blur(8px);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 9px;
  text-decoration: none;
  color: var(--fg);
}
.brand-logo { width: 20px; height: 20px; align-self: center; color: var(--fg); }
.logo-title { font-size: 17px; font-weight: 700; letter-spacing: -0.03em; }
.logo-sub {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--fg-3);
  text-transform: uppercase;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-self: center;
  font-family: var(--mono);
  font-size: 12px;
}
.nav-btn {
  background: none;
  border: none;
  padding: 4px 2px;
  cursor: pointer;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color 0.15s var(--ease);
}
.nav-btn:hover { color: var(--fg-2); }
.nav-btn.active { color: var(--fg); }
.nav-btn.active::after {
  content: "";
  display: block;
  height: 1px;
  margin-top: 3px;
  background: var(--fg);
}
.nav-sep { color: var(--fg-3); }

.header-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-self: end;
  min-width: 0;
}
.header-filename {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 36ch;
}
.header-links {
  display: flex;
  align-items: center;
  gap: 18px;
  white-space: nowrap;
}
.header-links a {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-3);
  text-decoration: none;
  transition: color 0.15s var(--ease);
}
.header-links a:hover { color: var(--fg); }

/* Footer (links live in the header on desktop; this is the mobile home) */
.app-footer { display: none; }

/* ============================ MAIN ============================ */

.player-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--pad);
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
}
/* When a video is loaded, sit the player just under the header (not centered),
   so video + controls + meta read as one stacked unit. */
.player-container:has(#player-wrapper:not([hidden])) { justify-content: flex-start; }

/* shared eyebrow + display headline used by start screens */
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-3);
  display: block;
  margin-bottom: 18px;
}
.drop-headline {
  font-size: clamp(40px, 6.4vw, 84px);
  line-height: 1.04;
  font-weight: 700;
  letter-spacing: -0.035em;
  margin: 0 0 26px;
  text-wrap: balance;
}
.drop-lede {
  max-width: 42ch;
  color: var(--fg-2);
  font-size: 15px;
  line-height: 1.6;
  margin: 0 0 32px;
}
/* Inline .tinv reads as code, the mono accent lives here (not the headline). */
.drop-lede code,
.convert-aside code {
  font-family: var(--mono);
  font-size: 0.86em;
  color: var(--fg);
  border: 1px solid var(--line);
  padding: 1px 5px;
}

/* ============================ SPLIT LAYOUT ============================ */
/* Editorial two-column: statement left, action/specs right, divided by a rule.
   Uses the full width instead of a cramped left rail. */

/* [hidden] must win over the grid display below. */
[hidden] { display: none !important; }

.split {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  align-items: stretch;
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.split-main {
  padding: clamp(36px, 6vw, 72px) clamp(32px, 5vw, 64px) clamp(36px, 6vw, 72px) 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}
.split-side {
  padding: clamp(36px, 6vw, 72px) 0 clamp(36px, 6vw, 72px) clamp(32px, 5vw, 64px);
  border-left: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 28px;
}

.side-specs { margin: 0; }
.side-specs > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-2);
}
.side-specs > div:first-child { padding-top: 0; }
.side-specs dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-3);
}
.side-specs dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg);
}

.convert-aside { font-size: 13px; color: var(--fg-3); margin: 0; }

/* ============================ DROPZONE ============================ */

.dropzone {
  padding: 0;
}
.dropzone.dragging {
  background:
    repeating-linear-gradient(-45deg, transparent 0 11px, var(--line-2) 11px 12px);
}
.drop-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  padding-top: 18px;
  border-top: 1px solid var(--line-2);
}
.tick {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--fg-3);
}
.tick::before { content: "● "; color: var(--fg-2); }

/* ============================ BUTTONS ============================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  font-weight: 600;
  padding: 12px 18px;
  border: 1px solid var(--fg);
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  transition: background 0.15s var(--ease), color 0.15s var(--ease);
}
.btn:hover { background: var(--ink-2); }
.btn-primary { background: var(--paper); color: var(--paper-ink); border-color: var(--paper); }
.btn-primary:hover { background: var(--fg-2); }
.btn:disabled { opacity: 0.35; cursor: not-allowed; }
.btn-key {
  font-family: var(--mono);
  font-size: 12px;
  opacity: 0.55;
  border: 1px solid currentColor;
  width: 20px; height: 20px;
  display: grid; place-items: center;
}
.btn-primary .btn-key { opacity: 0.4; }

/* ============================ PLAYER ============================ */

.player-wrapper { width: 100%; }

.video-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  /* Cap height so the controls + meta strip stay in view without scrolling.
     Leaves room for header (~58px) + control bar (~96px) + meta (~62px). */
  max-height: calc(100vh - 250px);
  background: #000;
  border: 1px solid var(--line);
}
#video-element { width: 100%; height: 100%; display: block; background: #000; object-fit: contain; }

.center-play-indicator {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  pointer-events: none; opacity: 0;
  transition: opacity 0.2s var(--ease);
}
.center-play-indicator.visible { opacity: 1; }
.indicator-icon {
  width: 64px; height: 64px; color: var(--paper-ink);
  background: var(--paper); padding: 18px;
}

/* ---- control bar: instrument row under the video ---- */

.control-bar {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-top: none;
}
.control-bar.hidden { opacity: 1 !important; }

.control-row { display: flex; align-items: center; }

.seek-row {
  gap: 14px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line-2);
}
.time {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--fg-2);
  font-variant-numeric: tabular-nums;
  min-width: 46px;
}
.seek-row .time:last-child { text-align: right; color: var(--fg-3); }

/* scrub bar */
.progress-bar-container { position: relative; flex: 1; padding: 9px 0; cursor: pointer; }
.progress-bar-bg { position: relative; height: 2px; background: var(--line); }
.progress-bar-container:hover .progress-bar-bg { height: 4px; transition: height 0.12s var(--ease); }
.progress-buffer { position: absolute; height: 100%; background: var(--line); }
.progress-fill { position: absolute; height: 100%; background: var(--fg); width: 0; }
.progress-knob {
  position: absolute; right: 0; top: 50%;
  transform: translate(50%, -50%);
  width: 9px; height: 9px; background: var(--fg);
  opacity: 0; transition: opacity 0.12s var(--ease);
}
.progress-bar-container:hover .progress-knob { opacity: 1; }
.progress-tooltip {
  position: absolute; top: -6px; transform: translateY(-100%);
  font-family: var(--mono); font-size: 11px;
  color: var(--paper-ink); background: var(--paper);
  padding: 2px 6px; opacity: 0; pointer-events: none;
}
.progress-bar-container:hover .progress-tooltip { opacity: 1; }

/* transport row */
.button-row { justify-content: space-between; padding: 6px 8px; }
.controls-group { display: flex; align-items: center; gap: 0; }

.control-btn {
  background: transparent; border: none; color: var(--fg-2);
  width: 40px; height: 40px; cursor: pointer;
  display: grid; place-items: center;
  transition: color 0.12s var(--ease), background 0.12s var(--ease);
}
.control-btn:hover { color: var(--fg); background: var(--ink-1); }
.btn-svg { width: 21px; height: 21px; }

/* the play button reads as the primary instrument control */
#play-pause-btn { color: var(--fg); }

/* volume */
.volume-control-wrapper { display: flex; align-items: center; gap: 6px; padding-right: 6px; }
.volume-slider-container { width: 76px; }
#volume-slider {
  width: 76px; height: 2px; -webkit-appearance: none; appearance: none;
  background: var(--line); cursor: pointer;
}
#volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none; width: 9px; height: 9px; background: var(--fg);
}
#volume-slider::-moz-range-thumb { width: 9px; height: 9px; background: var(--fg); border: none; border-radius: 0; }

/* speed */
.speed-control-wrapper { position: relative; }
.speed-badge {
  width: auto; padding: 0 12px; height: 40px;
  font-family: var(--mono); font-size: 13px; font-weight: 600;
  color: var(--fg);
}
.speed-menu {
  position: absolute; bottom: 46px; left: 0;
  background: var(--ink-1); border: 1px solid var(--line);
  display: none; flex-direction: column; min-width: 76px; z-index: 5;
}
.speed-menu.open { display: flex; }
.speed-option {
  background: none; border: none; color: var(--fg-2);
  font-family: var(--mono); font-size: 12px;
  padding: 7px 14px; cursor: pointer; text-align: left;
  transition: background 0.1s var(--ease), color 0.1s var(--ease);
}
.speed-option:hover { background: var(--ink-2); color: var(--fg); }
.speed-option.active { color: var(--paper-ink); background: var(--paper); font-weight: 600; }

/* ---- meta strip (editorial signature) ---- */

.meta-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 0;
  border: 1px solid var(--line);
  border-top: none;
}
.meta-cell {
  padding: 12px 16px;
  border-right: 1px solid var(--line-2);
  min-width: 0;
}
.meta-cell:last-child { border-right: none; }
.meta-cell dt {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin-bottom: 5px;
}
.meta-cell dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ============================ CONVERT ============================ */

.form {
  border-top: 1px solid var(--line);
  margin-bottom: 28px;
}
.field {
  display: grid;
  grid-template-columns: 130px 1fr;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.field-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-3);
}
/* Buttons / checkboxes in a field sit content-width, left-aligned. */
.field > .btn,
.field > .check { justify-self: start; }
.field > .select { max-width: 340px; }
.select {
  font: inherit;
  font-size: 14px;
  color: var(--fg);
  background: var(--ink-1);
  border: 1px solid var(--line);
  padding: 9px 12px;
  width: 100%;
  cursor: pointer;
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--fg-2) 50%),
                    linear-gradient(135deg, var(--fg-2) 50%, transparent 50%);
  background-position: right 14px center, right 9px center;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}
.check { display: flex; align-items: center; gap: 9px; font-size: 14px; color: var(--fg-2); cursor: pointer; }
.check input {
  appearance: none; -webkit-appearance: none;
  width: 16px; height: 16px; border: 1px solid var(--fg-3);
  background: transparent; cursor: pointer; display: grid; place-items: center;
}
.check input:checked { background: var(--paper); border-color: var(--paper); }
.check input:checked::after { content: "✕"; color: var(--paper-ink); font-size: 11px; line-height: 1; }

.convert-progress-wrap { margin-top: 24px; }
.convert-progress-bar { height: 2px; background: var(--line); }
#convert-progress-fill { height: 100%; width: 0; background: var(--fg); transition: width 0.2s var(--ease); }
.convert-status {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-2);
}
.convert-result { margin-top: 24px; display: flex; flex-direction: column; gap: 14px; }
.convert-done { font-family: var(--mono); font-size: 14px; color: var(--fg); }

/* ============================ COMPAT BANNER ============================ */

.compat-banner {
  display: flex; align-items: center; gap: 14px;
  padding: 11px var(--pad);
  background: var(--paper); color: var(--paper-ink);
  font-size: 13px; line-height: 1.4;
}
.compat-banner strong { font-weight: 700; }
.compat-banner span { flex: 1; }
.compat-dismiss {
  background: none; border: 1px solid var(--paper-ink); color: var(--paper-ink);
  width: 22px; height: 22px; cursor: pointer; flex-shrink: 0;
  display: grid; place-items: center; font-size: 12px;
}

/* ============================ CHAPTERS ============================ */

.chapter-panel {
  position: absolute; top: 0; right: 0; bottom: 0;
  width: 260px; overflow-y: auto;
  background: color-mix(in oklab, var(--ink-0) 82%, transparent);
  backdrop-filter: blur(10px);
  border-left: 1px solid var(--line);
  padding: 14px;
}
.chapter-title {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--fg-3); margin-bottom: 10px;
}
.chapter-item {
  display: flex; gap: 12px; width: 100%;
  background: none; border: none; color: var(--fg-2);
  padding: 8px 6px; cursor: pointer; text-align: left;
  border-top: 1px solid var(--line-2);
  transition: color 0.1s var(--ease), background 0.1s var(--ease);
}
.chapter-item:hover { color: var(--fg); background: var(--ink-1); }
.chapter-time { font-family: var(--mono); font-size: 11px; color: var(--fg-3); min-width: 46px; }

/* ============================ EMBED ============================ */

body.embed .app-header,
body.embed .meta-strip { display: none; }
body.embed .player-container { padding: 0; max-width: none; }
body.embed .video-stage { height: 100vh; aspect-ratio: auto; border: none; }
body.embed .control-bar {
  position: fixed; bottom: 0; left: 0; right: 0; border: none;
  background: linear-gradient(transparent, oklch(0 0 0 / 0.88));
}

/* ============================ INSTALL BTN ============================ */

.install-btn {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--paper-ink);
  background: var(--paper); border: none; padding: 5px 11px; cursor: pointer;
}

/* ============================ RESPONSIVE ============================ */

@media (max-width: 900px) {
  /* Collapse the editorial split to a single column. */
  .split { grid-template-columns: 1fr; }
  .split-main { padding: clamp(28px, 7vw, 48px) 0 0; }
  .split-side {
    padding: 28px 0 clamp(28px, 7vw, 48px);
    border-left: none;
    border-top: 1px solid var(--line);
    margin-top: 28px;
  }
}

@media (max-width: 720px) {
  /* Header becomes a clean two-part bar: logo left, Play/Convert right.
     Secondary links move out of the header into the footer. */
  .app-header { grid-template-columns: auto 1fr; }
  .header-nav { justify-self: end; grid-column: 2; }
  .header-meta { display: none; }
  .header-links { display: none; }

  /* Footer holds the secondary links. */
  .app-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px var(--pad);
    border-top: 1px solid var(--line);
    margin-top: auto;
  }
  .footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 18px;
  }
  .footer-links a {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--fg-3);
    text-decoration: none;
    transition: color 0.15s var(--ease);
  }
  .footer-links a:hover { color: var(--fg); }
  .footer-mark {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--fg-3);
  }

  .meta-strip { grid-template-columns: repeat(2, 1fr); }
  .meta-cell:nth-child(2) { border-right: none; }
  .meta-cell:nth-child(-n+2) { border-bottom: 1px solid var(--line-2); }
  .field { grid-template-columns: 1fr; gap: 8px; }
  .volume-slider-container { display: none; }
}

@media (max-width: 460px) {
  .meta-strip { grid-template-columns: 1fr; }
  .meta-cell { border-right: none !important; border-bottom: 1px solid var(--line-2); }
  .meta-cell:last-child { border-bottom: none; }
  .control-btn { width: 36px; height: 36px; }
  .btn-svg { width: 19px; height: 19px; }
}

/* ---- Convert: unsupported-browser message ---- */
.convert-unsupported { display: flex; flex-direction: column; gap: 12px; }
.cu-title { font-size: 15px; font-weight: 600; color: var(--fg); margin: 0; }
.cu-body { font-size: 14px; color: var(--fg-2); margin: 0; line-height: 1.6; }
.cu-body code {
  font-family: var(--mono); font-size: 0.86em; color: var(--fg);
  border: 1px solid var(--line); padding: 1px 5px;
}