/* ============================================
   FileDrop - Style
   ============================================ */

/* --- CSS Variables (Light theme) --- */
:root,
[data-theme="light"] {
  --bg: #f0f2f5;
  --bg-alt: #e4e7ec;
  --surface: #ffffff;
  --surface-hover: #f7f8fa;
  --text: #1a1a2e;
  --text-secondary: #5a5e6b;
  --text-muted: #8b8f9e;
  --accent: #4a6cf7;
  --accent-hover: #3a5ce5;
  --accent-light: #e8edff;
  --border: #d8dbe4;
  --border-light: #eceef3;
  --danger: #e74c5e;
  --danger-hover: #d43a4c;
  --success: #2ecc71;
  --success-bg: #e8faf0;
  --warning: #f0a32e;
  --warning-bg: #fff8eb;
  --shadow: rgba(0, 0, 0, 0.06);
  --shadow-md: rgba(0, 0, 0, 0.1);
  --drop-zone-bg: #f7f9ff;
  --drop-zone-border: #b4c6fc;
  --drop-zone-active: #e0e8ff;
  --code-bg: #f4f5f7;
  --overlay: rgba(0, 0, 0, 0.4);
}

/* --- Dark theme --- */
[data-theme="dark"] {
  --bg: #0f1117;
  --bg-alt: #181b24;
  --surface: #1e2130;
  --surface-hover: #262a3a;
  --text: #e4e6f0;
  --text-secondary: #a0a4b8;
  --text-muted: #686d82;
  --accent: #5b7bfa;
  --accent-hover: #7b95ff;
  --accent-light: #1e2444;
  --border: #2c3045;
  --border-light: #242838;
  --danger: #f06272;
  --danger-hover: #ff7a88;
  --success: #3dd68c;
  --success-bg: #162e22;
  --warning: #f5b74e;
  --warning-bg: #2c2518;
  --shadow: rgba(0, 0, 0, 0.25);
  --shadow-md: rgba(0, 0, 0, 0.4);
  --drop-zone-bg: #161929;
  --drop-zone-border: #3b4a7a;
  --drop-zone-active: #1e2a50;
  --code-bg: #161929;
  --overlay: rgba(0, 0, 0, 0.65);
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Quicksand', sans-serif;
  font-weight: 400;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  transition: background-color 0.3s, color 0.3s;
}

h1, h2, h3, h4, button, label, .fw-600 {
  font-weight: 600;
}

/* NEVER use bold/700 */

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

.mono {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 400;
}

.mono-medium {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 500;
}

/* --- Layout --- */
.app-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px;
}

/* --- Header --- */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}

.header-logo {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-logo svg {
  width: 28px;
  height: 28px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-user {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* --- Theme Toggle --- */
.theme-toggle {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--text-secondary);
  transition: background 0.2s, border-color 0.2s;
}
.theme-toggle:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
  color: var(--accent);
}
.theme-toggle svg {
  width: 18px;
  height: 18px;
}

/* --- Buttons --- */
.btn {
  font-family: 'Quicksand', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn:active {
  transform: scale(0.97);
}

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

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

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-outline:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
}

.btn-small {
  padding: 6px 12px;
  font-size: 0.8rem;
}

.btn-icon {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 4px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
}
.btn-icon:hover {
  color: var(--accent);
  background: var(--accent-light);
}

/* --- Cards --- */
.card {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 1px 3px var(--shadow);
}

/* --- Auth Forms --- */
.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 120px);
}

.auth-card {
  width: 100%;
  max-width: 400px;
}

.auth-card h2 {
  margin-bottom: 24px;
  text-align: center;
  font-size: 1.4rem;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-family: 'Quicksand', sans-serif;
  font-size: 0.95rem;
  transition: border-color 0.2s;
}
.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.form-input::placeholder {
  color: var(--text-muted);
}

select.form-input {
  cursor: pointer;
}

textarea.form-input {
  resize: vertical;
  min-height: 60px;
}

.form-error {
  color: var(--danger);
  font-size: 0.85rem;
  margin-top: 8px;
}

.auth-toggle {
  text-align: center;
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border-light);
  margin-bottom: 24px;
  overflow-x: auto;
}

.tab {
  font-family: 'Quicksand', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 10px 20px;
  border: none;
  background: none;
  color: var(--text-muted);
  cursor: pointer;
  position: relative;
  white-space: nowrap;
  transition: color 0.2s;
}
.tab:hover {
  color: var(--text);
}
.tab.active {
  color: var(--accent);
}
.tab.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.tab-content {
  display: none;
}
.tab-content.active {
  display: block;
}

/* --- Drop Zone --- */
.drop-zone {
  border: 2px dashed var(--drop-zone-border);
  border-radius: 16px;
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  background: var(--drop-zone-bg);
  transition: background 0.2s, border-color 0.2s;
}
.drop-zone:hover,
.drop-zone.drag-over {
  background: var(--drop-zone-active);
  border-color: var(--accent);
}

.drop-zone-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  color: var(--accent);
}

.drop-zone-text {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.drop-zone-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- File List --- */
.file-list {
  margin-top: 16px;
}

.file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  margin-bottom: 8px;
}

.file-item-info {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.file-item-name {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-item-size {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.file-remove {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 4px;
  border-radius: 4px;
  line-height: 1;
}
.file-remove:hover {
  color: var(--danger);
  background: rgba(231, 76, 94, 0.1);
}

/* --- Progress Bar --- */
.progress-container {
  margin-top: 16px;
  display: none;
}
.progress-container.visible {
  display: block;
}

.progress-bar-wrapper {
  height: 8px;
  background: var(--bg-alt);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  transition: width 0.3s ease;
  width: 0%;
}

.progress-text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 6px;
  text-align: right;
}

/* --- Upload Options --- */
.upload-options {
  margin-top: 20px;
  display: grid;
  gap: 12px;
}

.upload-options-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

@media (max-width: 600px) {
  .upload-options-row {
    grid-template-columns: 1fr;
  }
}

/* --- Upload Result --- */
.upload-result {
  display: none;
  margin-top: 20px;
  padding: 20px;
  background: var(--success-bg);
  border: 1px solid var(--success);
  border-radius: 12px;
}
.upload-result.visible {
  display: block;
}

.upload-result-link {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  word-break: break-all;
  background: var(--code-bg);
  padding: 10px 14px;
  border-radius: 8px;
  margin: 10px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.upload-result-link code {
  overflow: hidden;
  text-overflow: ellipsis;
}

/* --- Table --- */
.table-wrapper {
  overflow-x: auto;
  margin-top: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

th {
  text-align: left;
  padding: 10px 12px;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 2px solid var(--border-light);
  white-space: nowrap;
}

td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-light);
  vertical-align: middle;
}

tr:hover td {
  background: var(--surface-hover);
}

td .mono {
  font-size: 0.8rem;
}

/* --- Status badges --- */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-active {
  background: var(--success-bg);
  color: var(--success);
}

.badge-expired {
  background: rgba(231, 76, 94, 0.1);
  color: var(--danger);
}

.badge-deleted {
  background: var(--bg-alt);
  color: var(--text-muted);
}

.badge-used {
  background: var(--accent-light);
  color: var(--accent);
}

/* --- Modal --- */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--overlay);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}
.modal-overlay.visible {
  display: flex;
}

.modal {
  background: var(--surface);
  border-radius: 12px;
  padding: 24px;
  width: 90%;
  max-width: 500px;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 8px 32px var(--shadow-md);
}

.modal h3 {
  margin-bottom: 16px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
}

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}

.empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
  opacity: 0.4;
}

/* --- Download Page --- */
.download-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.download-card {
  width: 100%;
  max-width: 480px;
  text-align: center;
}

.download-card h2 {
  margin-bottom: 8px;
  font-size: 1.3rem;
}

.download-meta {
  margin: 20px 0;
}

.download-meta-item {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.9rem;
}

.download-meta-label {
  color: var(--text-secondary);
}

.download-meta-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
}

.download-message {
  background: var(--bg);
  border-radius: 8px;
  padding: 14px;
  margin: 16px 0;
  font-style: italic;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-left: 3px solid var(--accent);
}

.download-btn {
  width: 100%;
  padding: 16px 24px;
  font-size: 1.1rem;
  margin-top: 16px;
}

.download-error {
  color: var(--danger);
  text-align: center;
  padding: 40px 20px;
}

.download-error h2 {
  margin-bottom: 8px;
}

/* --- Alerts --- */
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 0.85rem;
}

.alert-warning {
  background: var(--warning-bg);
  color: var(--warning);
  border: 1px solid var(--warning);
}

.alert-error {
  background: rgba(231, 76, 94, 0.1);
  color: var(--danger);
  border: 1px solid var(--danger);
}

.alert-success {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid var(--success);
}

/* --- Log Table --- */
.log-table {
  font-size: 0.8rem;
}

.log-table td {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  padding: 6px 8px;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .app-container {
    padding: 12px;
  }

  .header {
    flex-wrap: wrap;
    gap: 10px;
  }

  .card {
    padding: 16px;
  }

  .drop-zone {
    padding: 32px 16px;
  }

  .tabs {
    gap: 0;
  }

  .tab {
    padding: 8px 12px;
    font-size: 0.8rem;
  }

  table {
    font-size: 0.75rem;
  }

  th, td {
    padding: 6px 8px;
  }
}

/* --- Utility --- */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.text-muted {
  color: var(--text-muted);
}

.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* --- Tooltip copy feedback --- */
.copy-feedback {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--success);
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  z-index: 2000;
  animation: fadeInOut 2s forwards;
}

@keyframes fadeInOut {
  0% { opacity: 0; transform: translateY(-10px); }
  15% { opacity: 1; transform: translateY(0); }
  85% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(-10px); }
}

/* --- Token display --- */
.token-display {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  background: var(--code-bg);
  padding: 12px;
  border-radius: 8px;
  word-break: break-all;
  border: 1px solid var(--border);
  margin: 12px 0;
}

/* Spinner */
.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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