/* ============================================================
   Daily Photo Reveal - Main Stylesheet
   A clean, gallery-focused design with warm neutrals.
   ============================================================ */

/* --- 1. Custom Properties (Theming) --- */
:root {
  /* Color Palette */
  --color-bg: #f8f6f3;
  --color-surface: #ffffff;
  --color-text: #2c2c2c;
  --color-text-secondary: #6b6b6b;
  --color-text-muted: #a0a0a0;
  --color-accent: #4a90d9;
  --color-accent-hover: #3a78bd;
  --color-accent-light: #e8f0fb;
  --color-danger: #d94a4a;
  --color-danger-hover: #bd3a3a;
  --color-success: #3a9a5c;
  --color-success-bg: #eaf7ee;
  --color-error-bg: #fceaea;
  --color-amber: #d4a853;
  --color-amber-light: #faf3e3;
  --color-border: #e5e2de;
  --color-nav-bg: #1e1e1e;
  --color-nav-text: #f0efed;
  --color-nav-link: #c8c6c2;
  --color-nav-link-hover: #ffffff;
  --color-calendar-today: #4a90d9;
  --color-calendar-has-photos: #faf3e3;
  --color-shadow: rgba(0, 0, 0, 0.06);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Layout */
  --max-width: 1100px;
  --radius: 6px;
  --radius-lg: 10px;

  /* Typography */
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --line-height: 1.6;
}


/* --- 2. Body --- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3 {
  margin-top: 0;
  line-height: 1.25;
  color: var(--color-text);
}

h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--space-lg);
}

h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

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

a:hover {
  text-decoration: underline;
}

img {
  display: block;
  max-width: 100%;
}

input[type="text"],
input[type="password"] {
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.9rem;
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.15s ease;
}

input[type="text"]:focus,
input[type="password"]:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.15);
}

label {
  display: inline-block;
  margin-bottom: var(--space-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}


/* --- 3. Navbar --- */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-xl);
  height: 56px;
  background-color: var(--color-nav-bg);
  color: var(--color-nav-text);
}

.navbar a {
  color: var(--color-nav-link);
  text-decoration: none;
  transition: color 0.15s ease;
}

.navbar a:hover {
  color: var(--color-nav-link-hover);
  text-decoration: none;
}


/* --- 4. Nav Brand --- */
.nav-brand {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-nav-link-hover) !important;
}


/* --- 5. Nav Links --- */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
}

.nav-user {
  font-size: 0.85rem;
  color: var(--color-nav-link);
  opacity: 0.8;
}


/* --- 6. Container --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
}


/* --- 7. Photo Grid --- */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-md);
}


/* --- 8. Photo Card --- */
.photo-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 1px 4px var(--color-shadow), 0 4px 16px var(--color-shadow);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.photo-card:hover {
  box-shadow: 0 2px 8px var(--color-shadow), 0 8px 24px rgba(0, 0, 0, 0.09);
  transform: translateY(-2px);
}


/* --- 9. Photo Card Image --- */
.photo-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}


/* --- 10. Caption --- */
.caption {
  padding: var(--space-sm) var(--space-md);
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.4;
}


/* --- 11. Calendar (table) --- */
.calendar {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 1px 4px var(--color-shadow);
}

.calendar th {
  padding: var(--space-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.calendar td {
  padding: var(--space-xs);
  text-align: center;
  vertical-align: middle;
  height: 48px;
  border: 1px solid var(--color-border);
  font-size: 0.9rem;
  position: relative;
}

.calendar td span {
  display: inline-block;
  width: 32px;
  height: 32px;
  line-height: 32px;
  border-radius: 50%;
}


/* --- 12. Calendar: Has Photos --- */
.calendar .has-photos {
  background-color: var(--color-calendar-has-photos);
}

.calendar .has-photos a {
  font-weight: 600;
  color: var(--color-amber);
}


/* --- 13. Calendar: Today --- */
.calendar .today {
  background-color: var(--color-accent-light);
}

.calendar .today a,
.calendar .today span {
  font-weight: 700;
  color: var(--color-accent);
}


/* --- 14. Calendar: Future / Muted --- */
.calendar .future {
  background-color: transparent;
}

.calendar .future span,
.muted {
  color: var(--color-text-muted);
  opacity: 0.6;
}


/* --- 15. Calendar: Clickable Dates --- */
.calendar a {
  display: inline-block;
  width: 32px;
  height: 32px;
  line-height: 32px;
  border-radius: 50%;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.calendar a:hover {
  background-color: var(--color-accent);
  color: #fff;
  text-decoration: none;
}


/* --- 16. Calendar Header --- */
.calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
  gap: var(--space-md);
}

.calendar-header h2 {
  margin: 0;
  flex: 1;
  text-align: center;
  font-size: 1.15rem;
  white-space: nowrap;
}

.calendar-header button {
  padding: var(--space-xs) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.calendar-header button:hover {
  background-color: var(--color-bg);
  border-color: var(--color-text-muted);
}


/* --- 17. Button (Primary) --- */
.btn {
  display: inline-block;
  padding: 0.55rem 1.25rem;
  background-color: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: background-color 0.15s ease, transform 0.1s ease;
  line-height: 1.4;
}

.btn:hover {
  background-color: var(--color-accent-hover);
  text-decoration: none;
  color: #fff;
}

.btn:active {
  transform: scale(0.98);
}


/* --- 18. Button Small --- */
.btn-sm {
  display: inline-block;
  padding: 0.3rem 0.7rem;
  background-color: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.btn-sm:hover {
  background-color: var(--color-accent-hover);
}


/* --- 19. Button Danger --- */
.btn-danger {
  background-color: var(--color-danger) !important;
  color: #fff;
}

.btn-danger:hover {
  background-color: var(--color-danger-hover) !important;
}


/* --- 20. Button Link (Logout) --- */
.btn-link {
  background: none;
  border: none;
  color: var(--color-nav-link);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  padding: 0;
  text-decoration: none;
  transition: color 0.15s ease;
}

.btn-link:hover {
  color: var(--color-nav-link-hover);
  text-decoration: underline;
}


/* --- 21. Upload Zone --- */
.upload-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl) var(--space-xl);
  text-align: center;
  margin-bottom: var(--space-lg);
  background-color: var(--color-surface);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.upload-zone:hover {
  border-color: var(--color-accent);
  background-color: var(--color-accent-light);
}

.upload-zone p {
  margin: 0 0 var(--space-md) 0;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.upload-zone input[type="file"] {
  font-size: 0.9rem;
}


/* --- 22. Stats Grid --- */
.stats-grid {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
}


/* --- 23. Stat Card --- */
.stat-card {
  flex: 1;
  min-width: 160px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-xl);
  box-shadow: 0 1px 4px var(--color-shadow);
  text-align: center;
}

.stat-card h3 {
  font-size: 2.25rem;
  font-weight: 700;
  margin: 0 0 var(--space-xs) 0;
  color: var(--color-accent);
}

.stat-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 500;
}


/* --- 24. Admin Nav --- */
.admin-nav {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}


/* --- 25. Admin Grid --- */
.admin-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.admin-grid .photo-card img {
  aspect-ratio: 1 / 1;
}

.photo-info {
  padding: var(--space-sm) var(--space-md) var(--space-md);
}

.photo-info input[type="text"] {
  width: 100%;
  margin-bottom: var(--space-sm);
  font-size: 0.85rem;
}

.photo-info form {
  margin-top: var(--space-xs);
}


/* --- 26. Data Table --- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 1px 4px var(--color-shadow);
}

.data-table th {
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  background-color: var(--color-bg);
  border-bottom: 2px solid var(--color-border);
}

.data-table td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
  vertical-align: middle;
}

.data-table tbody tr:nth-child(even) {
  background-color: rgba(0, 0, 0, 0.015);
}

.data-table tbody tr:hover {
  background-color: var(--color-accent-light);
}

.data-table td input[type="password"] {
  width: 140px;
  font-size: 0.85rem;
}


/* --- 27. Schedule Layout --- */
.schedule-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}


/* --- 28. Date Panel --- */
.date-panel {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: 0 1px 4px var(--color-shadow);
  min-height: 200px;
}

.date-panel p {
  color: var(--color-text-secondary);
  margin: 0;
}

.date-panel h3 {
  margin-bottom: var(--space-md);
}


/* --- 29. Badge --- */
.badge {
  position: absolute;
  top: 2px;
  right: 2px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  font-size: 0.65rem;
  font-weight: 700;
  color: #fff;
  background-color: var(--color-amber);
  border-radius: 9px;
  line-height: 1;
}


/* --- 30. Empty Message --- */
.empty-message {
  text-align: center;
  color: var(--color-text-muted);
  font-style: italic;
  padding: var(--space-2xl) 0;
  font-size: 1rem;
}

.empty-message a {
  font-style: normal;
}


/* --- 31. Success / Error Alerts --- */
.success {
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid var(--color-success);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  margin: var(--space-md) 0;
}

.error {
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-error-bg);
  color: var(--color-danger);
  border: 1px solid var(--color-danger);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  margin: var(--space-md) 0;
}


/* --- 32. Filename --- */
.filename {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-xs) 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}


/* --- 33. Mobile Responsive --- */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    height: auto;
    padding: var(--space-sm) var(--space-md);
    gap: var(--space-sm);
  }

  .nav-links {
    gap: var(--space-md);
    flex-wrap: wrap;
    justify-content: center;
  }

  .container {
    padding: var(--space-md);
  }

  h1 {
    font-size: 1.4rem;
  }

  .photo-grid {
    grid-template-columns: 1fr;
  }

  .admin-grid {
    grid-template-columns: 1fr 1fr;
  }

  .schedule-layout {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    flex-direction: column;
  }

  .admin-nav {
    flex-direction: column;
  }

  .admin-nav .btn {
    text-align: center;
  }

  .calendar-header h2 {
    font-size: 1rem;
  }

  .data-table {
    font-size: 0.85rem;
  }

  .data-table td input[type="password"] {
    width: 100px;
  }
}

@media (max-width: 480px) {
  .admin-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Login Page --- */
.login-container {
  max-width: 400px;
  margin: 80px auto;
  padding: var(--space-xl);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

.login-container h1 {
  text-align: center;
  margin-bottom: var(--space-lg);
  color: var(--color-text);
}

.login-form .form-group {
  margin-bottom: var(--space-md);
}

.login-form label {
  display: block;
  margin-bottom: 4px;
  font-weight: 500;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

.login-form input[type="text"],
.login-form input[type="password"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  box-sizing: border-box;
  transition: border-color 0.2s;
}

.login-form input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}


/* --- 34. Lightbox --- */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.9);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  cursor: pointer;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius);
}

.lightbox-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-xl);
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
  opacity: 0.7;
  transition: opacity 0.15s;
}

.lightbox-close:hover {
  opacity: 1;
}

.lightbox-caption {
  color: #ccc;
  font-size: 0.95rem;
  margin-top: var(--space-md);
  text-align: center;
  max-width: 600px;
}

.photo-card {
  cursor: pointer;
}


/* --- 35. Schedule Thumbnails --- */
.assigned-photos {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.assigned-photo-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs);
  background: var(--color-bg);
  border-radius: var(--radius);
}

.assigned-photo-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.schedule-thumb {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: var(--radius);
  flex-shrink: 0;
}


/* --- 36. Photo Picker Grid --- */
.available-photos {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: var(--space-sm);
}

.pick-photo-form {
  margin: 0;
}

.pick-photo-btn {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  background: none;
  cursor: pointer;
  overflow: hidden;
  transition: border-color 0.15s, transform 0.1s;
}

.pick-photo-btn:hover {
  border-color: var(--color-accent);
  transform: scale(1.05);
}

.schedule-thumb-pick {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
}

.pick-label {
  position: absolute;
  bottom: 2px;
  right: 2px;
  width: 22px;
  height: 22px;
  line-height: 20px;
  text-align: center;
  background: var(--color-accent);
  color: #fff;
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 700;
  opacity: 0;
  transition: opacity 0.15s;
}

.pick-photo-btn:hover .pick-label {
  opacity: 1;
}