*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0f0f0f;
  --surface: #1a1a1a;
  --border: #2a2a2a;
  --text: #e8e8e8;
  --text-muted: #888;
  --accent: #4f8ef7;
  --accent-hover: #3a7be0;
  --danger: #e05252;
  --success: #4caf7d;
  --radius: 12px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.container {
  width: 100%;
  max-width: 520px;
  padding: 24px 16px 48px;
}

/* ── Header ── */

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.logo {
  height: 32px;
  width: auto;
  display: block;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-muted);
}

.user-info img {
  width: 28px;
  height: 28px;
  border-radius: 50%;
}

.logout-btn {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.15s;
}
.logout-btn:hover { color: var(--text); }

/* ── Card ── */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}

.card h1 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
}

/* ── Login ── */

.login-card p {
  color: var(--text-muted);
  font-size: 15px;
  margin-bottom: 28px;
  line-height: 1.5;
}

.google-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #fff;
  color: #3c4043;
  border: none;
  border-radius: 8px;
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: box-shadow 0.15s;
}
.google-btn:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.35); }

/* ── Drop zone ── */

.drop-zone {
  position: relative;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  margin: 24px 0 0;
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(79, 142, 247, 0.06);
}

.file-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.drop-zone-content {
  text-align: center;
  padding: 28px;
  pointer-events: none;
  color: var(--text-muted);
}

.drop-zone-content svg {
  margin-bottom: 12px;
  opacity: 0.5;
}

.drop-zone-content p {
  font-size: 15px;
  line-height: 1.6;
}

.drop-zone-content span {
  font-size: 13px;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Preview */
.preview-content {
  width: 100%;
  text-align: center;
  padding: 16px;
}

.preview-content img {
  max-height: 200px;
  max-width: 100%;
  border-radius: 8px;
  object-fit: contain;
  display: block;
  margin: 0 auto 12px;
}

.change-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
  position: relative;
  z-index: 2;
  pointer-events: all;
}
.change-btn:hover { border-color: var(--text-muted); color: var(--text); }

/* ── Filename ── */

.filename-row {
  margin-top: 20px;
}

.filename-row label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.filename-input-wrap {
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg);
  transition: border-color 0.15s;
}
.filename-input-wrap:focus-within { border-color: var(--accent); }

.filename-input-wrap input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 14px;
  padding: 10px 12px;
}

.filename-ext {
  font-size: 13px;
  color: var(--text-muted);
  padding-right: 12px;
}

.filename-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ── Buttons ── */

.upload-btn {
  width: 100%;
  margin-top: 20px;
  padding: 12px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
}
.upload-btn:hover:not(:disabled) { background: var(--accent-hover); }
.upload-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ── Progress ── */

.progress-wrap {
  margin-top: 20px;
  text-align: center;
}

.progress-bar {
  height: 6px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 99px;
  transition: width 0.2s;
}

.progress-wrap span {
  font-size: 13px;
  color: var(--text-muted);
}

/* ── Result ── */

.result-box {
  margin-top: 24px;
  padding: 20px;
  border: 1px solid var(--success);
  border-radius: var(--radius);
  background: rgba(76, 175, 125, 0.06);
}

.result-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--success);
  margin-bottom: 10px;
}

.result-row {
  display: flex;
  gap: 8px;
}

.result-row input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
  padding: 8px 10px;
  outline: none;
}

.copy-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
}
.copy-btn:hover { background: var(--accent-hover); }
.copy-btn.copied { background: var(--success); }

.another-btn {
  width: 100%;
  margin-top: 12px;
  padding: 9px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 14px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.another-btn:hover { border-color: var(--text-muted); color: var(--text); }

/* ── Error ── */

.error-msg {
  margin-top: 16px;
  padding: 12px 14px;
  background: rgba(224, 82, 82, 0.08);
  border: 1px solid var(--danger);
  border-radius: 8px;
  font-size: 14px;
  color: var(--danger);
}

/* ── Utilities ── */

.hidden { display: none !important; }

.screen { animation: fadeIn 0.2s ease; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}