/* Blindserve — tokens adapted from the wireframe handoff's "Industry" design
   system (docs/design/industry-tokens-reference.css), per the README's
   instruction to treat that file as a starting token set, not final styling.
   Deliberate deviation: no Google Fonts @import — a zero-knowledge privacy
   tool shouldn't phone home to a third party just to render text, so this
   falls back to the system sans/monospace stacks instead of Barlow. */

:root {
  --color-bg: #f2f2f3;
  --color-surface: #e9e9ea;
  --color-text: #1d1f20;
  --color-accent: #5980a6;
  --color-divider: color-mix(in srgb, #1d1f20 16%, transparent);

  --color-accent-100: #eef6ff;
  --color-accent-200: #d6ebff;
  --color-accent-300: #b5d9fd;
  --color-accent-400: #94bce3;
  --color-accent-600: #597ea3;
  --color-accent-700: #416180;
  --color-accent-800: #2c455d;
  --color-accent-900: #1d2d3d;

  --font-heading: "Barlow Condensed", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Barlow", ui-sans-serif, system-ui, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --space-1: 3.4px;
  --space-2: 6.8px;
  --space-3: 10.2px;
  --space-4: 13.6px;
  --space-6: 20.4px;
  --space-8: 27.2px;

  --rail-w: 200px;
  --detail-w: 300px;
  --send-w: 320px;
}

* , *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
}
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 var(--space-2);
}
p { margin: 0 0 var(--space-3); }
.mono { font-family: var(--font-mono); }
.text-muted { color: color-mix(in srgb, var(--color-text) 58%, transparent); }
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
button { font: inherit; color: inherit; }
#app { min-height: 100%; }
.boot-loading { padding: var(--space-8); text-align: center; color: color-mix(in srgb, var(--color-text) 55%, transparent); }

/* — buttons — */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  cursor: pointer; font-family: var(--font-heading); font-weight: 600; font-size: 14px;
  background: transparent; border: 1px solid var(--color-divider); border-radius: 0;
  padding: var(--space-2) calc(var(--space-3) * 1.2);
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-bg); }
.btn-primary:hover:not(:disabled) { background: var(--color-accent-600); }
.btn-primary:active:not(:disabled) { background: var(--color-accent-700); }
.btn-secondary:hover:not(:disabled) { background: color-mix(in srgb, var(--color-text) 7%, transparent); }
.btn-ghost { border-color: transparent; color: var(--color-accent); }
.btn-ghost:hover:not(:disabled) { background: color-mix(in srgb, var(--color-accent) 10%, transparent); }
.btn-block { width: 100%; }

/* — inputs — */
.field { display: block; margin-bottom: var(--space-3); }
.field > label { display: block; font-size: 12px; margin-bottom: 5px; color: color-mix(in srgb, var(--color-text) 70%, transparent); }
.input {
  width: 100%; min-height: 36px; padding: 6px 10px; font: inherit; font-size: 14px;
  color: var(--color-text); background: var(--color-surface);
  border: 1px solid var(--color-divider); border-radius: 0;
}
.input:hover { border-color: color-mix(in srgb, var(--color-text) 45%, transparent); }
.input:focus-visible { border-color: var(--color-accent); }
textarea.input { min-height: 140px; resize: vertical; }
.form-error { color: #b3261e; font-size: 13px; margin: 0 0 var(--space-2); }

.seg { display: inline-flex; border: 1px solid var(--color-divider); }
.seg-opt { display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; font-size: 13px; cursor: pointer; }
.seg-opt + .seg-opt { border-left: 1px solid var(--color-divider); }
.seg-opt input { position: absolute; opacity: 0; width: 0; height: 0; }
.seg-opt.is-active { background: var(--color-accent); color: var(--color-bg); }
.seg-opt:not(.is-active):hover { background: color-mix(in srgb, var(--color-text) 7%, transparent); }

.tag { display: inline-flex; align-items: center; font-size: 11px; letter-spacing: 0.02em; padding: 3px 9px; border: 1px solid transparent; }
.tag-accent { background: var(--color-accent-100); color: var(--color-accent-800); }
.tag-outline { border-color: var(--color-accent); color: var(--color-accent); }
.tag-neutral { background: color-mix(in srgb, var(--color-text) 8%, transparent); color: var(--color-text); }

.hr { height: 1px; border: 0; margin: var(--space-4) 0; background: var(--color-divider); }

/* — sign-in — */
.signin-shell { min-height: 100vh; display: grid; place-items: center; padding: var(--space-4); }
.signin-card { width: min(360px, 100%); border: 1px solid var(--color-divider); padding: var(--space-6); }
.signin-card h1 { font-size: 28px; margin-bottom: var(--space-1); }
.standing-note {
  font-size: 12px; color: color-mix(in srgb, var(--color-text) 60%, transparent);
  border: 1px solid var(--color-divider); padding: var(--space-2) var(--space-3); margin-top: var(--space-4);
}

/* — brand bar — */
.brand-bar {
  display: flex; align-items: center; gap: var(--space-4);
  padding: var(--space-3) var(--space-4); border-bottom: 1px solid var(--color-divider);
}
.brand-bar .wordmark { font-family: var(--font-heading); font-weight: 600; font-size: 20px; }
.brand-bar .standing-line { font-size: 12px; color: color-mix(in srgb, var(--color-text) 55%, transparent); flex: 1; }
.brand-bar .current-user { font-size: 13px; display: flex; align-items: center; gap: var(--space-2); }

/* — shell layout — */
.shell { display: flex; align-items: stretch; min-height: calc(100vh - 53px); }
.rail {
  width: var(--rail-w); flex: none; border-right: 1px solid var(--color-divider);
  display: flex; flex-direction: column; padding: var(--space-3) 0;
}
.rail-row {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-2);
  padding: var(--space-2) var(--space-4); cursor: pointer; border-left: 2px solid transparent;
}
.rail-row:hover { background: color-mix(in srgb, var(--color-text) 5%, transparent); }
.rail-row.is-selected { background: var(--color-accent-100); border-left-color: var(--color-accent); }
.rail-section-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; padding: var(--space-3) var(--space-4) var(--space-1); color: color-mix(in srgb, var(--color-text) 55%, transparent); }
.rail-note {
  margin: auto var(--space-3) 0; padding: var(--space-2); font-size: 11px;
  color: color-mix(in srgb, var(--color-text) 55%, transparent); border: 1px solid var(--color-divider);
}
.waiting-count {
  min-width: 18px; height: 18px; padding: 0 5px; display: inline-flex; align-items: center; justify-content: center;
  background: var(--color-accent); color: var(--color-bg); font-size: 11px;
}

.list-col { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.list-col-header { padding: var(--space-3) var(--space-4); }
.file-row {
  display: flex; align-items: center; gap: var(--space-3); padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
}
.file-row.is-collected { opacity: 0.55; }
.file-row.is-sending { background: var(--color-accent-100); }
.file-row.is-selected { background: color-mix(in srgb, var(--color-text) 5%, transparent); }
.file-row .file-main { flex: 1; min-width: 0; }
.file-row .filename { font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-row .file-meta { font-size: 12px; color: color-mix(in srgb, var(--color-text) 55%, transparent); display: flex; gap: var(--space-2); align-items: center; }
.file-row.is-wrong .file-meta { color: #b3261e; }
.list-footer-note { padding: var(--space-3) var(--space-4); font-size: 11px; color: color-mix(in srgb, var(--color-text) 55%, transparent); }
.empty-state { padding: var(--space-8); text-align: center; color: color-mix(in srgb, var(--color-text) 55%, transparent); }

.detail-col { width: var(--detail-w); flex: none; border-left: 1px solid var(--color-divider); padding: var(--space-4); display: flex; flex-direction: column; gap: var(--space-3); }
.detail-kicker { font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-accent); }
.detail-preview { border: 1px solid var(--color-divider); padding: var(--space-6); flex: 1; display: flex; align-items: center; justify-content: center; text-align: center; color: color-mix(in srgb, var(--color-text) 55%, transparent); overflow: auto; white-space: pre-wrap; word-break: break-word; }
.countdown-block { border: 1px solid var(--color-divider); padding: var(--space-3); }
.countdown-bar { height: 4px; background: color-mix(in srgb, var(--color-text) 12%, transparent); margin-top: var(--space-2); }
.countdown-bar > span { display: block; height: 100%; background: var(--color-accent); }

/* — overlays: dialog on desktop, bottom sheet on mobile (same DOM) — */
.overlay-backdrop { position: fixed; inset: 0; background: color-mix(in srgb, #1d1f20 45%, transparent); display: grid; place-items: center; z-index: 20; }
.overlay-panel { width: min(420px, 100%); max-height: 90vh; overflow: auto; background: var(--color-bg); border: 1px solid var(--color-divider); padding: var(--space-4); }
.send-panel .overlay-panel { width: var(--send-w); }

.progress-step { display: flex; align-items: center; gap: var(--space-3); margin-bottom: var(--space-2); }
.progress-step .bar { flex: 1; height: 6px; background: color-mix(in srgb, var(--color-text) 12%, transparent); }
.progress-step .bar > span { display: block; height: 100%; background: var(--color-accent-300); }
.progress-step.is-active .bar > span { background: var(--color-accent); }
.progress-step.is-done .bar > span { background: var(--color-accent-300); width: 100% !important; }
.progress-step .label { width: 140px; font-size: 13px; flex: none; }
.progress-step.is-waiting { opacity: 0.5; }
.progress-step .bar.is-neutral > span { background: color-mix(in srgb, var(--color-text) 35%, transparent) !important; }

.pairing-methods { list-style: none; margin: 0; padding: 0; }
.pairing-methods li { padding: var(--space-2) var(--space-3); border: 1px solid var(--color-divider); margin-bottom: var(--space-1); }
.pairing-methods li:nth-child(1) { opacity: 1; }
.pairing-methods li:nth-child(2) { opacity: 0.92; }
.pairing-methods li:nth-child(3) { opacity: 0.84; }
.pairing-methods li:nth-child(4) { opacity: 0.76; }
.pairing-methods li:nth-child(5) { opacity: 0.68; }
.pairing-methods li:nth-child(6) { opacity: 0.6; }
.qr-box { width: 180px; height: 180px; border: 1px solid var(--color-divider); margin: var(--space-3) auto; display: grid; place-items: center; padding: var(--space-2); }
.qr-box svg { width: 100%; height: 100%; display: block; }
.secret-words { font-size: 20px; text-align: center; letter-spacing: 0.04em; padding: var(--space-3); border: 1px solid var(--color-divider); margin-bottom: var(--space-3); }

.roster-caret { cursor: pointer; color: var(--color-accent); }
.group-roster { list-style: none; margin: var(--space-2) 0 0; padding: 0; font-size: 13px; }
.group-roster li { padding: var(--space-1) 0; }

/* — nav header actions — */
.header-actions { display: flex; gap: var(--space-2); }

/* — mobile — */
@media (max-width: 860px) {
  .shell { flex-direction: column; }
  .rail { width: 100%; flex-direction: row; overflow-x: auto; border-right: none; border-bottom: 1px solid var(--color-divider); padding: var(--space-2); }
  .rail-section-label { display: none; }
  .rail-row { border-left: none; border-bottom: 2px solid transparent; white-space: nowrap; }
  .rail-row.is-selected { border-left: none; border-bottom-color: var(--color-accent); background: transparent; }
  .rail-note { display: none; }
  .detail-col { position: fixed; inset: 0; width: 100%; background: var(--color-bg); z-index: 15; overflow: auto; }
  .overlay-backdrop { align-items: flex-end; }
  .overlay-panel, .send-panel .overlay-panel { width: 100%; max-height: 85vh; }
}

.brand-bar .send-cta { margin-left: auto; }
@media (max-width: 860px) {
  .brand-bar .send-cta { display: none; }
  .mobile-send-bar { position: fixed; bottom: 0; left: 0; right: 0; padding: var(--space-3); border-top: 1px solid var(--color-divider); background: var(--color-bg); z-index: 10; }
  .mobile-send-bar .btn { width: 100%; }
}
@media (min-width: 861px) {
  .mobile-send-bar { display: none; }
}