/* ============================================================
   MediaFire Direct — Swiss design, FAK LABS branding
   BUG FIX: [hidden] must beat every display rule below.
   (Author display:flex/grid on .result was overriding the
   hidden attribute, rendering an empty card on page load.)
   ============================================================ */
[hidden] { display: none !important; }

:root {
  --bg: #ffffff;
  --ink: #0a0a0a;
  --muted: #6e6e6e;
  --faint: #9a9a9a;
  --red: #e30613;
  --red-dark: #b0050f;
  --line: #e3e3e3;
  --panel: #fafafa;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.wrap {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------------- header ---------------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 20;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 40px;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  font-size: 17px;
  letter-spacing: 0.08em;
  color: var(--ink);
  text-decoration: none;
}

.brand-sq {
  width: 18px;
  height: 18px;
  background: var(--red);
  flex: none;
}

.nav {
  display: flex;
  gap: 32px;
  margin-left: auto;
}

.nav a {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}

.nav a:hover { border-bottom-color: var(--red); }

.ver {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--faint);
  border-left: 1px solid var(--line);
  padding-left: 32px;
  white-space: nowrap;
}

/* ---------------- sections ---------------- */
main { flex: 1; }

.section {
  padding: 72px 0;
  scroll-margin-top: 68px;
}

.section + .section { border-top: 1px solid var(--line); }

.sec-head {
  display: flex;
  align-items: baseline;
  gap: 20px;
  margin-bottom: 8px;
}

.sec-num {
  color: var(--red);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.1em;
}

.sec-head h1,
.sec-head h2 {
  margin: 0;
  font-size: clamp(44px, 7vw, 84px);
  font-weight: 900;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  line-height: 1;
}

.sec-rule {
  flex: 1;
  height: 1px;
  background: var(--line);
  align-self: center;
  min-width: 40px;
}

.kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 40px;
}

.kicker .sq {
  width: 10px;
  height: 10px;
  background: var(--red);
  flex: none;
}

/* ---------------- lookup form ---------------- */
.field-label {
  display: block;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.field-label .req {
  color: var(--red);
  margin-left: 10px;
}

.field-row {
  display: flex;
  gap: 0;
  border: 1px solid var(--ink);
}

.field-row input {
  flex: 1;
  min-width: 0;
  border: none;
  background: #fff;
  color: var(--ink);
  font-size: 16px;
  font-family: inherit;
  padding: 20px 22px;
  outline: none;
}

.field-row input::placeholder { color: #b5b5b5; }

.field-row input:focus { background: #fffdfd; box-shadow: inset 0 0 0 2px var(--red); }

.field-row button {
  background: var(--red);
  color: #fff;
  border: none;
  border-left: 1px solid var(--ink);
  font-family: inherit;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 0 40px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
}

.field-row button:hover:not(:disabled) { background: var(--red-dark); }
.field-row button:disabled { opacity: 0.55; cursor: wait; }

.hint {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
  margin: 16px 0 0;
  max-width: 640px;
}

.form-error {
  color: var(--red-dark);
  font-size: 14px;
  font-weight: 600;
  margin: 16px 0 0;
  border-left: 3px solid var(--red);
  padding-left: 14px;
}

/* ---------------- loading ---------------- */
.loading {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 32px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.loading p { margin: 0; }

.spinner {
  width: 26px;
  height: 26px;
  flex: none;
  border: 3px solid var(--line);
  border-top-color: var(--red);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ---------------- result card ---------------- */
.result {
  margin-top: 32px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--red);
  background: var(--panel);
  padding: 32px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: start;
  animation: rise 0.25s ease;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

.result-main h2 {
  margin: 0 0 12px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
}

.result-stats {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.result-stats .dot { margin: 0 10px; color: var(--red); }

.result-source { margin: 14px 0 0; font-size: 13px; }

.result-source a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.result-source a:hover { color: var(--ink); border-bottom-color: var(--ink); }

.result-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 220px;
}

.btn {
  display: inline-block;
  text-align: center;
  text-decoration: none;
  font-family: inherit;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 16px 28px;
  cursor: pointer;
  border: 1px solid var(--ink);
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.btn.primary { background: var(--red); border-color: var(--red); color: #fff; }
.btn.primary:hover { background: var(--red-dark); border-color: var(--red-dark); }

.btn.ghost { background: #fff; color: var(--ink); }
.btn.ghost:hover { background: var(--ink); color: #fff; }

.copy-note {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #15803d;
}

/* ---------------- api error ---------------- */
.api-error {
  margin-top: 24px;
  border: 1px solid var(--red);
  background: #fff5f5;
  color: var(--red-dark);
  padding: 18px 22px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.6;
}

/* ---------------- recent ---------------- */
.recent { margin-top: 48px; }

.recent-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 12px;
  margin-bottom: 4px;
}

.recent-head h2 {
  margin: 0;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.link-btn {
  background: none;
  border: none;
  color: var(--muted);
  font-family: inherit;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  padding: 4px 0;
}

.link-btn:hover { color: var(--red); }

#recent-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

#recent-list li { border-bottom: 1px solid var(--line); }

#recent-list button {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  background: none;
  border: none;
  font-family: inherit;
  font-size: 14px;
  color: var(--ink);
  text-align: left;
  padding: 14px 4px;
  cursor: pointer;
}

#recent-list button:hover .r-name { color: var(--red); }

#recent-list .r-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 600;
}

#recent-list .r-size {
  flex: none;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--faint);
}

/* ---------------- social rail ---------------- */
.rail {
  position: fixed;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 30;
  display: flex;
  flex-direction: column;
  box-shadow: 4px 0 24px rgba(0, 0, 0, 0.12);
}

.rail a {
  display: flex;
  align-items: center;
  width: 54px;
  height: 54px;
  overflow: hidden;
  white-space: nowrap;
  background: #0a0a0a;
  color: #fff;
  text-decoration: none;
  transition: width 0.28s ease, background-color 0.28s ease;
}

.rail a + a { border-top: 1px solid #262626; }

.rail a svg {
  flex: none;
  margin: 0 16px;
}

.rail a span {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity 0.2s ease 0.08s, transform 0.25s ease 0.08s;
  padding-right: 24px;
}

.rail a:hover,
.rail a:focus-visible {
  width: 178px;
  background: var(--brand);
  outline: none;
}

.rail a:hover span,
.rail a:focus-visible span {
  opacity: 1;
  transform: none;
}

@media (max-width: 1100px) {
  .rail { display: none; }
}

/* ---------------- how it works ---------------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--line);
}

.step { padding: 32px; }

.step + .step { border-left: 1px solid var(--line); }

.step-n {
  display: inline-block;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: #fff;
  background: var(--red);
  width: 30px;
  height: 30px;
  line-height: 30px;
  text-align: center;
  margin-bottom: 20px;
}

.step h3 {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.step p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.7; }

/* ---------------- footer ---------------- */
footer {
  border-top: 1px solid var(--ink);
  margin-top: 32px;
  padding: 36px 0 48px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  font-size: 15px;
  letter-spacing: 0.08em;
  margin: 0 0 10px;
}

.footer-inner .fine {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

/* ---------------- mobile ---------------- */
@media (max-width: 720px) {
  .wrap { padding: 0 20px; }
  .nav { display: none; }
  .ver { margin-left: auto; border-left: none; padding-left: 0; }
  .section { padding: 52px 0; }
  .field-row { flex-direction: column; border: 1px solid var(--ink); }
  .field-row button { border-left: none; border-top: 1px solid var(--ink); padding: 18px; }
  .result { grid-template-columns: 1fr; padding: 24px; }
  .result-actions { min-width: 0; }
  .steps { grid-template-columns: 1fr; }
  .step + .step { border-left: none; border-top: 1px solid var(--line); }
  .api-row { grid-template-columns: 1fr; }
  .api-row p { grid-column: 1; }
}

/* ---------------- update banner ---------------- */
.update-banner {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: var(--ink);
  color: #fff;
  border-left: 4px solid var(--red);
  padding: 16px 20px;
  max-width: 420px;
  width: calc(100vw - 48px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.22);
  animation: slideUp 0.28s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: none; }
}

.update-banner__text {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}

.update-banner__sq {
  width: 10px;
  height: 10px;
  background: var(--red);
  flex: none;
}

.update-banner__actions {
  display: flex;
  gap: 8px;
  flex: none;
}

.update-banner__btn {
  font-family: inherit;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 10px 18px;
  border: 1px solid #fff;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
}

.update-banner__btn--primary {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
}

.update-banner__btn--primary:hover { background: var(--red-dark); border-color: var(--red-dark); }

.update-banner__btn--ghost {
  background: transparent;
  color: #fff;
}

.update-banner__btn--ghost:hover { background: #fff; color: var(--ink); }

@media (max-width: 480px) {
  .update-banner {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    bottom: 16px;
    right: 16px;
    width: calc(100vw - 32px);
  }
}