/* =========================================================
   Flipbook — base styles
   Palette: grey, white, black. No color.
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg: #0a0a0a;
  --bg-elev: #141414;
  --bg-soft: #1c1c1c;
  --border: #262626;
  --border-strong: #333;
  --text: #ededed;
  --text-muted: #888;
  --text-soft: #aaa;
  --accent: #fafafa;
  --danger: #ef4444;
  --radius: 6px;
  --radius-lg: 10px;
  --shadow: 0 4px 20px rgba(0,0,0,0.5);
  --transition: 180ms ease;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--text); text-decoration: none; }
a:hover { color: var(--accent); }

code { font-family: var(--font-mono); font-size: 0.9em; background: var(--bg-soft); padding: 1px 5px; border-radius: 3px; }
small { color: var(--text-muted); font-size: 0.85em; }
.muted { color: var(--text-muted); }

/* ---------- Upload page layout ---------- */

.page-upload .container {
  max-width: 540px;
  margin: 0 auto;
  padding: 60px 24px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.brand { margin-bottom: 32px; }
.brand h1 {
  font-size: 28px;
  font-weight: 600;
  margin: 0 0 6px;
  letter-spacing: -0.02em;
}
.brand p { margin: 0; color: var(--text-muted); }

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field > span {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-soft);
  letter-spacing: 0.01em;
}
.field input[type="text"],
.field input[type="password"],
.field input[type="number"],
.field input[type="file"] {
  background: var(--bg);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 11px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  transition: border-color var(--transition);
}
.field input:focus {
  outline: none;
  border-color: var(--text-soft);
}
.field input[type="file"] { padding: 8px; cursor: pointer; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}
.btn-primary:hover { background: #fff; color: #000; }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-ghost {
  background: transparent;
  color: var(--text-soft);
  border-color: var(--border-strong);
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-soft); }
.btn-block { width: 100%; }

.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 14px;
}
.alert-error {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

.success-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.success-card h2 {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.share-row { display: flex; gap: 8px; }
.share-row input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 11px 14px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 13px;
}

.footer {
  margin-top: auto;
  padding-top: 40px;
  text-align: center;
  color: var(--text-muted);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}