/* Freelancer Hub — 自由职业聚合平台 */

:root {
  --bg: #0f0f12;
  --bg-card: #18181d;
  --bg-input: #1e1e24;
  --border: #2a2a32;
  --text: #e8e8ed;
  --text-muted: #8b8b9a;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --success: #22c55e;
  --tag-bg: #2a2a32;
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

[data-theme="light"] {
  --bg: #f4f4f6;
  --bg-card: #fff;
  --bg-input: #f0f0f4;
  --border: #e4e4ea;
  --text: #1a1a1e;
  --text-muted: #6b6b78;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --tag-bg: #e8e8ed;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1.5rem;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
}

.logo span {
  color: var(--accent);
}

.nav {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.nav-link {
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s, background 0.2s;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent);
  background: rgba(99, 102, 241, 0.12);
}

#btn-theme {
  margin-left: auto;
}

/* Main */
.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.page {
  display: none;
}

.page.active {
  display: block;
}

.page-head {
  margin-bottom: 1.5rem;
}

.page-head h1 {
  margin: 0 0 0.25rem;
  font-size: 1.75rem;
  font-weight: 700;
}

.subtitle {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, transform 0.1s;
}

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

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

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

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn-ghost:hover {
  background: var(--tag-bg);
  color: var(--text);
}

/* Search bar */
.search-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.search-bar input[type="search"],
.search-bar select {
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  min-width: 140px;
}

.search-bar input[type="search"] {
  flex: 1;
  min-width: 200px;
}

/* Job cards */
.job-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
}

.job-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.job-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.job-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.35;
}

.job-card .platform {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  background: var(--tag-bg);
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.job-card .meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.job-card .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.75rem;
}

.job-card .tag {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  background: var(--tag-bg);
  color: var(--text-muted);
}

.job-card .actions {
  margin-top: 1rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.job-card .match-score {
  font-size: 0.8rem;
  color: var(--success);
  font-weight: 500;
}

/* Form */
.form-card {
  max-width: 560px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.95rem;
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

/* Apply flow */
.apply-flow {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.apply-step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.apply-step h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.apply-step .hint {
  margin: 0 0 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.job-list.compact .job-card {
  padding: 0.75rem 1rem;
}

.job-list.compact .job-card h3 {
  font-size: 0.95rem;
}

.letter-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1rem;
}

.letter-item {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  font-size: 0.9rem;
  line-height: 1.5;
}

.letter-item strong {
  display: block;
  margin-bottom: 0.5rem;
}

.letter-item .copy-btn {
  margin-top: 0.5rem;
  font-size: 0.8rem;
}

.platform-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.platform-links a {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--tag-bg);
  color: var(--text);
  text-decoration: none;
  font-size: 0.9rem;
  transition: background 0.2s;
}

.platform-links a:hover {
  background: var(--accent);
  color: #fff;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--text-muted);
}

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

.empty-state a:hover {
  text-decoration: underline;
}

.hidden {
  display: none !important;
}

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

.site-footer p {
  margin: 0;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* Responsive */
@media (max-width: 640px) {
  .header-inner {
    flex-wrap: wrap;
  }

  .nav {
    order: 3;
    width: 100%;
  }

  .search-bar {
    flex-direction: column;
  }

  .search-bar input[type="search"],
  .search-bar select {
    width: 100%;
  }
}