/* Calvin Feng Photography - Premium Design */
/* Inspired by 1x.com - In Pursuit Of The Sublime */

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

:root {
  --color-bg: #ffffff;
  --color-text: #000000;
  --color-text-secondary: #666666;
  --color-border: #e0e0e0;
  --color-accent: #000000;
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 32px;
  --spacing-lg: 64px;
  --spacing-xl: 120px;
}

body {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  font-weight: 300;
  letter-spacing: 0.3px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  /* Prevent image download */
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-user-drag: none;
  -webkit-touch-callout: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Header */
.header {
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: var(--color-bg);
  z-index: 1000;
  backdrop-filter: blur(10px);
}

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

.logo {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: none;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 12px;
}

.admin-link, .back-link {
  color: var(--color-text-secondary);
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: color 0.3s ease;
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid transparent;
}

.admin-link:hover, .back-link:hover {
  color: var(--color-text);
  border-color: var(--color-text-secondary);
}

/* Tagline */
.tagline {
  text-align: center;
  padding: var(--spacing-xl) 0;
  font-size: 28px;
  font-weight: 200;
  letter-spacing: 1px;
  color: var(--color-text-secondary);
  font-style: italic;
}

/* Category Navigation */
.category-nav {
  position: sticky;
  top: 81px;
  background: var(--color-bg);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
  z-index: 999;
  backdrop-filter: blur(10px);
}

.category-nav .container {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.category-btn {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 11px;
  color: var(--color-text-secondary);
  background: transparent;
  border: 1px solid transparent;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  transition: all 0.3s ease;
  white-space: nowrap;
}

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

.category-btn.active {
  color: var(--color-text);
  border-color: var(--color-text);
}

/* Photo Grid */
.photo-grid {
  padding: var(--spacing-xl) 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
  gap: var(--spacing-lg);
}

.photo-card {
  cursor: pointer;
  transition: transform 0.3s ease;
  position: relative;
  overflow: hidden;
}

.photo-card:hover {
  transform: translateY(-4px);
}

.photo-card img {
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: opacity 0.3s ease;
}

.photo-card:hover img {
  opacity: 0.9;
}

.photo-info {
  padding: var(--spacing-md) 0;
}

.photo-title {
  font-size: 14px;
  font-weight: 300;
  margin-bottom: var(--spacing-xs);
  letter-spacing: 0.5px;
  color: var(--color-text);
}

.photo-meta {
  font-size: 11px;
  color: var(--color-text-secondary);
  display: flex;
  gap: var(--spacing-sm);
  letter-spacing: 0.5px;
}

/* Photo Detail Page */
.photo-detail {
  padding: var(--spacing-xl) 0;
}

.photo-container {
  max-width: 1200px;
  margin: 0 auto var(--spacing-lg);
  text-align: center;
}

.photo-container img {
  width: 100%;
  height: auto;
  cursor: zoom-in;
  transition: opacity 0.3s ease;
}

.photo-container img:hover {
  opacity: 0.95;
}

.photo-details {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--spacing-lg) 0;
}

.photo-detail-title {
  font-size: 24px;
  font-weight: 300;
  margin-bottom: var(--spacing-md);
  letter-spacing: 1px;
}

.photo-description {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
}

.photo-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  margin-bottom: var(--spacing-xl);
}

.action-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

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

.action-btn.liked {
  color: var(--color-text);
  border-color: var(--color-text);
}

/* Comments Section */
.comments-section {
  max-width: 600px;
  margin: 0 auto;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

.comments-header {
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-secondary);
}

.comment-form {
  margin-bottom: var(--spacing-xl);
}

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

.form-input, .form-textarea {
  width: 100%;
  padding: var(--spacing-sm);
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 13px;
  font-family: inherit;
  transition: border-color 0.3s ease;
}

.form-input:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--color-text-secondary);
}

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

.btn-primary {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-text);
  color: var(--color-bg);
  border: none;
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: opacity 0.3s ease;
}

.btn-primary:hover {
  opacity: 0.7;
}

.comments-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.comment-item {
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.comment-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
  font-size: 11px;
  letter-spacing: 0.5px;
}

.comment-author {
  color: var(--color-text);
  text-transform: uppercase;
}

.comment-time {
  color: var(--color-text-secondary);
}

.comment-content {
  font-size: 13px;
  line-height: 1.8;
  color: var(--color-text-secondary);
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.95);
  z-index: 10000;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-lg);
  cursor: zoom-out;
}

.lightbox img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* Loading State */
.loading {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--color-text-secondary);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* Admin Styles */
.login-page {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: var(--spacing-md);
}

.login-box {
  max-width: 400px;
  width: 100%;
  padding: var(--spacing-xl);
  border: 1px solid var(--color-border);
}

.login-title {
  font-size: 18px;
  font-weight: 300;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.admin-dashboard {
  padding: var(--spacing-xl) 0;
}

.dashboard-nav {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.nav-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: all 0.3s ease;
}

.nav-btn:hover, .nav-btn.active {
  border-color: var(--color-text);
  color: var(--color-text);
}

.admin-page {
  display: none;
}

.admin-page.active {
  display: block;
}

/* Responsive */
@media (max-width: 768px) {
  :root {
    --spacing-lg: 32px;
    --spacing-xl: 64px;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  .photo-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .tagline {
    font-size: 20px;
    padding: var(--spacing-lg) 0;
  }

  .header {
    padding: var(--spacing-md) 0;
  }

  .category-nav {
    top: 73px;
  }
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.mb-0 { margin-bottom: 0; }
.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }