/* ===== CSS Variables ===== */
:root {
  --primary: #ff6b35;
  --primary-dark: #e5551f;
  --secondary: #004e98;
  --success: #2ecc71;
  --danger: #e74c3c;
  --dark: #1a1a2e;
  --darker: #16213e;
  --card-bg: #1e293b;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --border: #334155;
  --gold: #ffd700;
  --silver: #c0c0c0;
  --bronze: #cd7f32;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: linear-gradient(135deg, var(--dark) 0%, var(--darker) 100%);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Navbar ===== */
.navbar {
  background: rgba(30, 41, 59, 0.95);
  backdrop-filter: blur(10px);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-admin {
  background: rgba(30, 41, 59, 0.98);
  border-bottom: 2px solid var(--danger);
}

.nav-brand {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary);
  cursor: pointer;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo {
  height: 36px;
  width: auto;
  border-radius: 4px;
}

.header-logo {
  height: 80px;
  width: auto;
  margin-bottom: 12px;
  border-radius: 6px;
}

.login-logo {
  height: 60px;
  width: auto;
  margin-bottom: 8px;
  border-radius: 6px;
}

.nav-links {
  display: flex;
  gap: 8px;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s;
}

.nav-link:hover, .nav-link.active {
  color: var(--text);
  background: rgba(255, 107, 53, 0.15);
}

.nav-link.active {
  color: var(--primary);
}

/* ===== Tabs ===== */
.tab-content {
  display: none;
  padding: 32px 0;
  min-height: calc(100vh - 130px);
}

.tab-content.active {
  display: block;
}

/* ===== Leaderboard ===== */
.leaderboard-header {
  text-align: center;
  margin-bottom: 32px;
}

.leaderboard-header h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.leaderboard-header h1 i {
  color: var(--gold);
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.leaderboard-table-wrapper {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.leaderboard-table {
  width: 100%;
  border-collapse: collapse;
}

.leaderboard-table thead {
  background: rgba(255, 107, 53, 0.1);
}

.leaderboard-table th {
  padding: 14px 16px;
  text-align: left;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--primary);
  border-bottom: 1px solid var(--border);
}

.leaderboard-table td {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(51, 65, 85, 0.5);
  font-size: 0.95rem;
}

.leaderboard-table tbody tr:hover {
  background: rgba(255, 107, 53, 0.05);
}

.leaderboard-table tbody tr:last-child td {
  border-bottom: none;
}

.rank-col { width: 60px; text-align: center; }
.steps-col { font-weight: 700; }

.rank-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.85rem;
}

.rank-1 { background: var(--gold); color: #1a1a2e; }
.rank-2 { background: var(--silver); color: #1a1a2e; }
.rank-3 { background: var(--bronze); color: #fff; }
.rank-default { background: var(--border); color: var(--text); }

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
}

.loading-row {
  text-align: center;
  padding: 40px !important;
  color: var(--text-muted);
}

.empty-row {
  text-align: center;
  padding: 40px !important;
  color: var(--text-muted);
}

/* ===== Upload ===== */
.upload-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  max-width: 600px;
  margin: 0 auto;
}

.upload-card h2 {
  margin-bottom: 8px;
  font-size: 1.5rem;
}

.upload-desc {
  color: var(--text-muted);
  margin-bottom: 24px;
  font-size: 0.9rem;
}

.upload-dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s;
}

.upload-dropzone:hover, .upload-dropzone.dragover {
  border-color: var(--primary);
  background: rgba(255, 107, 53, 0.05);
}

.upload-dropzone i {
  font-size: 3rem;
  color: var(--primary);
  margin-bottom: 12px;
  display: block;
}

.upload-dropzone p {
  font-size: 1rem;
  margin-bottom: 8px;
}

.upload-dropzone span {
  color: var(--text-muted);
  font-size: 0.85rem;
  display: block;
  margin-bottom: 12px;
}

.image-preview-container {
  text-align: center;
  margin-bottom: 16px;
}

.image-preview-container img {
  max-width: 100%;
  max-height: 400px;
  border-radius: 8px;
  margin-bottom: 12px;
  border: 1px solid var(--border);
}

/* ===== Processing ===== */
.processing-area {
  text-align: center;
  padding: 40px 0;
}

.spinner-large i {
  font-size: 3rem;
  color: var(--primary);
  margin-bottom: 16px;
}

/* ===== Confirmation ===== */
.confirmation-area h3 {
  margin-bottom: 20px;
  color: var(--success);
}

.extracted-data-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ===== Success ===== */
.success-area {
  text-align: center;
  padding: 40px 0;
}

.success-icon {
  font-size: 4rem;
  color: var(--success);
  margin-bottom: 16px;
}

/* ===== Forms ===== */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.form-input {
  padding: 10px 14px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
}

.form-input[readonly] {
  opacity: 0.75;
  cursor: not-allowed;
  background: rgba(15, 23, 42, 0.8);
}

.confirm-value {
  padding: 10px 14px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  min-height: 1.2em;
}

.form-row {
  display: flex;
  gap: 16px;
}

/* ===== Buttons ===== */
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

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

.btn-success:hover:not(:disabled) {
  background: #27ae60;
}

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

.btn-danger:hover:not(:disabled) {
  background: #c0392b;
}

.btn-secondary {
  background: var(--border);
  color: var(--text);
}

.btn-secondary:hover:not(:disabled) {
  background: #475569;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.8rem;
}

.btn-block {
  width: 100%;
  margin-top: 16px;
}

.btn-group {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.btn-icon {
  padding: 6px 10px;
  font-size: 0.85rem;
}

/* ===== Login ===== */
.login-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.login-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 40px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.login-card h2 {
  text-align: center;
  margin-bottom: 24px;
}

.login-card h2 i {
  color: var(--primary);
}

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

.back-link {
  display: block;
  text-align: center;
  margin-top: 20px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
}

.back-link:hover {
  color: var(--text);
}

/* ===== Admin ===== */
.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 32px 0 24px;
}

.admin-header h1 {
  font-size: 1.5rem;
}

.admin-table-wrapper {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.admin-table .thumb-img {
  width: 50px;
  height: 50px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.admin-table .actions-cell {
  display: flex;
  gap: 6px;
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  width: 100%;
  max-width: 500px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: 1.1rem;
}

.btn-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0;
  line-height: 1;
}

.btn-close:hover {
  color: var(--text);
}

.modal-card form {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.entry-image-preview img {
  max-width: 100%;
  max-height: 150px;
  border-radius: 6px;
  margin-top: 8px;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--card-bg);
  color: var(--text);
  padding: 14px 24px;
  border-radius: 8px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--success);
  transform: translateX(120%);
  transition: transform 0.3s ease;
  z-index: 2000;
  font-size: 0.9rem;
}

.toast.show {
  transform: translateX(0);
}

.toast.error {
  border-left-color: var(--danger);
}

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 20px;
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

.admin-trigger {
  cursor: pointer;
  user-select: none;
  padding: 0 4px;
}

/* ===== Text Utilities ===== */
.text-muted {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .navbar {
    padding: 12px 16px;
  }

  .nav-brand {
    font-size: 1.2rem;
  }

  .nav-link {
    padding: 6px 10px;
    font-size: 0.8rem;
  }

  .container {
    padding: 0 12px;
  }

  .leaderboard-header h1 {
    font-size: 1.5rem;
  }

  .leaderboard-table th,
  .leaderboard-table td {
    padding: 10px 8px;
    font-size: 0.8rem;
  }

  .distance-col, .time-col {
    display: none;
  }

  .upload-card {
    padding: 20px;
  }

  .form-row {
    flex-direction: column;
    gap: 12px;
  }

  .btn-group {
    flex-direction: column;
  }

  .admin-header {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .date-col {
    display: none;
  }
}

/* ===== Help Page ===== */
.help-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.help-card h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.help-card h2 i {
  color: var(--primary);
}

.help-desc {
  color: var(--text-muted);
  margin-bottom: 24px;
  font-size: 0.95rem;
}

.help-video-wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 aspect ratio (9/16 * 100%) */
  height: 0;
  overflow: hidden;
  border-radius: var(--radius);
  margin-bottom: 32px;
  border: 1px solid var(--border);
}

.help-video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.help-form-section {
  margin-top: 24px;
}

.help-form-section h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.help-form-section h3 i {
  color: var(--primary);
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--darker);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
}

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

textarea.form-input {
  resize: vertical;
  min-height: 100px;
}

.help-success {
  text-align: center;
  padding: 32px 0;
}

.help-success .success-icon {
  font-size: 3rem;
  color: var(--success);
  margin-bottom: 12px;
}

.help-success h3 {
  margin-bottom: 8px;
}

.help-success p {
  color: var(--text-muted);
  margin-bottom: 16px;
}