:root {
  --ink: #f4f7fb;
  --muted: #aebacd;
  --surface: #151d29;
  --surface-raised: #1b2635;
  --canvas: #0a0f17;
  --primary: #50c8ef;
  --primary-dark: #1595c3;
  --focus: #50c8ef;
  --danger: #ff7777;
  --border: #34465d;
  --separator: #28394d;
  --success: #57d69a;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--canvas);
  color-scheme: dark;
  font-size: clamp(17px, 1.25vw + 12px, 20px);
  line-height: 1.5;
}

* { box-sizing: border-box; }
body {
  display: flex;
  flex-direction: column;
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background: radial-gradient(circle at 50% -20%, #17324a 0, var(--canvas) 42rem);
}
a { color: var(--primary); font-weight: 700; }
a:hover { color: #a4e9fb; }
button, input { font: inherit; }
button, .button, summary { min-height: 48px; }
button, .button { border-radius: .5rem; cursor: pointer; }
button:focus-visible, a:focus-visible, input:focus-visible, summary:focus-visible {
  outline: 4px solid var(--focus);
  outline-offset: 3px;
}
.skip-link { position: absolute; left: -9999px; top: 0; z-index: 20; background: var(--focus); color: #111827; padding: .75rem; }
.skip-link:focus { left: .5rem; }
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem max(1rem, calc((100% - 74rem) / 2));
  background: #101825;
  border-bottom: 1px solid var(--border);
  color: var(--ink);
}
.brand { display: flex; align-items: center; gap: .7rem; color: var(--ink); text-decoration: none; font-size: 1.25rem; }
.brand:hover { color: #fff; }
.signed-in { margin: 0; text-align: right; }
.page { flex: 1 0 auto; width: min(74rem, calc(100% - 2rem)); margin: 1.5rem auto 3rem; }
.site-footer { margin-top: auto; padding: 1.25rem 1rem; color: var(--muted); background: #0d141f; border-top: 1px solid var(--border); text-align: center; font-size: .9rem; }
h1, h2 { line-height: 1.2; }
h1 { margin: 0 0 .5rem; font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { margin-top: 0; font-size: 1.3rem; }
.lead { color: var(--muted); font-size: 1.1rem; }
.eyebrow { margin: 0 0 .25rem; color: var(--primary); font-weight: 800; text-transform: uppercase; letter-spacing: .06em; font-size: .8rem; }
.card {
  padding: clamp(1rem, 3vw, 2rem);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: .9rem;
  box-shadow: 0 1.25rem 3.5rem #0008;
}
.login-card, .error-card { width: min(100%, 32rem); margin: 6vh auto; }
.stacked-form { display: grid; gap: .65rem; }
label { font-weight: 750; }
input {
  min-height: 48px;
  padding: .65rem .75rem;
  color: var(--ink);
  background: #0d1420;
  border: 2px solid #465a73;
  border-radius: .45rem;
}
input::placeholder { color: #8998ad; }
input[type="file"] { height: auto; }
button, .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  padding: .6rem 1rem;
  border: 2px solid var(--primary);
  color: #061018;
  background: var(--primary);
  font-weight: 800;
  text-decoration: none;
}
button:hover, .button:hover { color: #fff; background: var(--primary-dark); border-color: var(--primary-dark); }
.secondary { color: var(--ink); background: transparent; border-color: #61738b; }
.secondary:hover { color: #fff; background: #34465d; border-color: #52677f; }
.danger { color: #25080b; background: var(--danger); border-color: var(--danger); }
.danger:hover { color: #fff; background: #d54856; border-color: #d54856; }
.hint { margin: 1.5rem 0 0; color: var(--muted); font-size: .9rem; }
.messages { margin-bottom: 1rem; }
.message { margin: .5rem 0; padding: .8rem 1rem; border-left: .4rem solid var(--primary); background: #123448; font-weight: 650; }
.message-error { border-color: var(--danger); background: #451c25; }
.message-success { border-color: var(--success); background: #133a2c; }
.dashboard-hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 2rem;
  background: linear-gradient(135deg, #172536, #162e3d);
}
.dashboard-hero h1 { margin-bottom: .65rem; }
.dashboard-hero .lead { max-width: 38rem; margin: 0; }
.dashboard-hero-icon {
  display: grid;
  flex: 0 0 auto;
  width: 5rem;
  height: 5rem;
  place-items: center;
  border: 1px solid #4fa6c2;
  border-radius: 1.25rem;
  color: #9ce9ff;
  background: #102737;
  font-size: 2.6rem;
  box-shadow: inset 0 1px #ffffff16;
}
.dashboard-section > h2 { margin: 0 0 1rem; }
.dashboard-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.action-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
  min-height: 8.5rem;
  padding: 1.15rem;
  border: 1px solid #347f9b;
  border-radius: 1rem;
  color: var(--ink);
  background: var(--surface-raised);
  text-decoration: none;
  text-align: left;
  transition: border-color .18s ease, background .18s ease, transform .18s ease;
}
.action-card:hover { color: var(--ink); background: #203549; border-color: var(--primary); transform: translateY(-2px); }
.action-icon { display: inline-grid; width: 3.25rem; height: 3.25rem; place-items: center; border-radius: .9rem; background: #183c50; font-size: 1.55rem; }
.action-copy { display: grid; gap: .18rem; min-width: 0; }
.action-copy strong { font-size: 1.12rem; }
.action-copy small { color: var(--muted); font-size: .86rem; font-weight: 500; }
.action-arrow { color: var(--primary); font-size: 1.45rem; font-weight: 700; }
.action-card:hover .action-icon { background: #1b526a; }
.action-card:hover .action-arrow { color: #a4e9fb; }
.logout-form { display: contents; }
.action-button { width: 100%; color: var(--ink); background: var(--surface-raised); font: inherit; }
.logout-button { border-color: #74515c; }
.logout-button:hover { background: #392934; border-color: var(--danger); }
.toolbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: .45rem; margin: 1rem 0; }
.back { margin-bottom: 1rem; }
.tools { margin: 1rem 0 1.5rem; }
.tool-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
.tool-grid form { display: grid; align-content: start; gap: .65rem; }
.upload-progress { width: 100%; height: 1.25rem; accent-color: var(--primary); }
.upload-status { min-height: 1.5rem; margin: 0; font-weight: 700; }
.files-section { background: var(--surface); border: 1px solid var(--border); border-radius: .8rem; overflow: hidden; }
.files-section h2 { padding: 1rem 1rem 0; }
.file-list { padding: 0; margin: 0; list-style: none; }
.file-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem; border-top: 1px solid var(--separator); }
.file-main { display: grid; grid-template-columns: auto minmax(10rem, 1fr) auto; align-items: center; gap: .65rem; min-width: 0; }
.file-type { font-size: 1.35rem; }
.file-name { overflow-wrap: anywhere; }
.file-size { color: var(--muted); white-space: nowrap; font-size: .9rem; }
.file-actions { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: .5rem; }
.compact { min-height: 42px; padding: .4rem .65rem; font-size: .88rem; }
details { border: 1px solid var(--border); border-radius: .45rem; background: var(--surface-raised); }
summary { display: flex; align-items: center; padding: .35rem .65rem; cursor: pointer; font-weight: 750; }
.inline-form { display: flex; gap: .4rem; padding: .4rem; border-top: 1px solid var(--separator); }
.inline-form input { width: min(18rem, 100%); min-height: 42px; }
.delete-form { margin: 0; }
.empty-state { margin: 0; padding: 2rem 1rem; color: var(--muted); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

@media (max-width: 680px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  .signed-in { text-align: left; }
  .dashboard-actions, .tool-grid { grid-template-columns: 1fr; }
  .dashboard-hero { align-items: flex-start; flex-direction: column; }
  .toolbar, .file-row { align-items: stretch; flex-direction: column; }
  .file-main { grid-template-columns: auto minmax(0, 1fr); }
  .file-size { grid-column: 2; }
  .file-actions { justify-content: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}