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

:root {
  --color-bg: #fafaf9;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #6b6b6b;
  --color-border: #e5e5e5;
  --color-accent: #2d2d2d;
  --color-accent-hover: #444;
  --color-error: #c0392b;
  --color-warning: #e67e22;
  --color-success: #27ae60;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;
  --max-width: 1100px;
  --radius: 6px;
}

html { font-size: 16px; }
body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

/* ===== Header ===== */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}
.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.site-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}
.site-logo:hover { text-decoration: none; }
.nav-links { display: flex; gap: 1.5rem; }
.nav-links a { color: var(--color-text-secondary); font-size: 0.9rem; }
.nav-links a:hover { color: var(--color-text); }

/* ===== Main ===== */
main {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem;
  width: 100%;
}

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem;
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
}

/* ===== Topic Showcase ===== */
.topic-header { text-align: center; margin-bottom: 2.5rem; }
.topic-header h1 {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}
.topic-description {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Photo Grid ===== */
.photo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
@media (max-width: 700px) {
  .photo-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}

.photo-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
}
.photo-card--empty {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  color: var(--color-text-secondary);
}

.photo-frame { cursor: pointer; position: relative; overflow: hidden; }
.photo-frame img {
  width: 100%;
  height: auto;
  transition: transform 0.3s ease;
}
.photo-frame:hover img { transform: scale(1.02); }

.photo-info { padding: 1rem 1.25rem 0.5rem; }
.photographer-name { font-weight: 600; font-size: 0.95rem; }
.photographer-name a { color: var(--color-text); }
.photo-caption {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

/* ===== Reactions ===== */
.reactions {
  padding: 0.75rem 1.25rem 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.reaction-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  background: var(--color-surface);
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
  line-height: 1;
}
.reaction-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-text);
}
.reaction-btn.active {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.reaction-count {
  font-weight: 600;
  font-size: 0.8rem;
}

/* ===== Lightbox ===== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.25s ease;
  cursor: pointer;
}
.lightbox.active { opacity: 1; }
.lightbox-img {
  max-width: 92vw;
  max-height: 90vh;
  object-fit: contain;
  cursor: default;
  border-radius: 2px;
}
.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  background: none;
  border: none;
  line-height: 1;
  opacity: 0.8;
}
.lightbox-close:hover { opacity: 1; }
.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: #fff;
  font-size: 2.5rem;
  cursor: pointer;
  background: none;
  border: none;
  padding: 1rem;
  opacity: 0.6;
  transition: opacity 0.15s;
}
.lightbox-nav:hover { opacity: 1; }
.lightbox-prev { left: 0.5rem; }
.lightbox-next { right: 0.5rem; }
.lightbox-caption {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,0.85);
  font-size: 0.9rem;
  text-align: center;
  max-width: 80vw;
}

/* ===== Topics Archive ===== */
.topics-archive h1 {
  font-family: var(--font-serif);
  font-size: 2rem;
  margin-bottom: 2rem;
}
.topics-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}
.topic-card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.2s ease;
}
.topic-card:hover {
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}
.topic-thumbs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  aspect-ratio: 2/1;
  overflow: hidden;
  background: var(--color-border);
}
.topic-thumbs img { width: 100%; height: 100%; object-fit: cover; }
.thumb-placeholder {
  background: var(--color-border);
  grid-column: span 2;
}
.topic-card-info { padding: 1rem 1.25rem; }
.topic-card-info h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--color-text);
}
.topic-card-info time {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* ===== Forms ===== */
.form { max-width: 500px; }
.form--narrow { max-width: 360px; }
.form-group { margin-bottom: 1.25rem; }
.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}
.form-group label small { font-weight: 400; color: var(--color-text-secondary); }
.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="password"],
.form-group input[type="datetime-local"],
.form-group textarea {
  width: 100%;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: var(--font-sans);
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}
.form-group input[type="file"] { font-size: 0.9rem; }

.btn {
  display: inline-block;
  padding: 0.6rem 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  font-family: var(--font-sans);
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn-primary:hover { background: var(--color-accent-hover); text-decoration: none; }
.btn-secondary { background: var(--color-surface); color: var(--color-text); }
.btn-secondary:hover { background: var(--color-bg); text-decoration: none; }
.btn-sm { padding: 0.3rem 0.8rem; font-size: 0.82rem; }

.form-error {
  background: #fdf0ef;
  color: var(--color-error);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
  border: 1px solid #f5c6cb;
}
.form-warning {
  background: #fef9e7;
  color: var(--color-warning);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
  border: 1px solid #fdeaa8;
}
.warning-text { color: var(--color-error); font-weight: 600; }

.upload-preview {
  max-width: 300px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

/* ===== Admin ===== */
.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}
.admin-header h1 { font-family: var(--font-serif); font-size: 2rem; }
.admin-actions { display: flex; gap: 0.75rem; }

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.admin-table th, .admin-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
.admin-table th {
  font-weight: 600;
  color: var(--color-text-secondary);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.admin-table a { font-weight: 600; }

.status {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
}
.status--published { background: #e6f9ee; color: var(--color-success); }
.status--scheduled { background: #e8f0fe; color: #2563eb; }

/* ===== Cards ===== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.card--important { border-color: var(--color-warning); }
.card h2 { font-size: 1.2rem; margin-bottom: 0.75rem; }
.card h3 { font-size: 1.05rem; margin-bottom: 0.5rem; }

.meta-list { display: grid; grid-template-columns: auto 1fr; gap: 0.4rem 1.5rem; }
.meta-list dt { font-weight: 600; color: var(--color-text-secondary); font-size: 0.9rem; }
.meta-list dd { font-size: 0.9rem; }

.token-display { margin: 0.75rem 0; }
.token-display label { font-weight: 600; display: block; margin-bottom: 0.25rem; font-size: 0.9rem; }
.token-input {
  width: 100%;
  padding: 0.5rem 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-family: monospace;
  background: var(--color-bg);
}

.admin-submission { margin-top: 1rem; }
.admin-thumb { width: 200px; border-radius: var(--radius); margin-bottom: 0.5rem; }
.admin-reactions { margin-top: 1rem; }
.admin-reactions h4 { font-size: 0.9rem; margin-bottom: 0.4rem; }
.reaction-stat {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background: var(--color-bg);
  border-radius: 100px;
  font-size: 0.82rem;
  margin-right: 0.25rem;
}

.back-link {
  display: inline-block;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.submit-page { max-width: 500px; }
.submit-page h1 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}
.submit-topic { color: var(--color-text-secondary); margin-bottom: 1.5rem; }

.empty-state {
  text-align: center;
  padding: 4rem 1rem;
}
.empty-state h1 {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}
.empty-message { color: var(--color-text-secondary); }

.error-page { text-align: center; padding: 4rem 1rem; }
.error-page h1 { font-size: 4rem; font-family: var(--font-serif); margin-bottom: 0.5rem; }