/* ═══ PromptHub — Global Styles (v2 + OAuth) ═══ */
:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #eef2ff;
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #1e293b;
  --text-secondary: #64748b;
  --border: #e2e8f0;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-lg: 0 10px 25px rgba(0,0,0,.08);
  --transition: .2s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ── Buttons ── */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 8px 18px; border: none; border-radius: var(--radius-sm); font-size: 14px; font-weight: 500; cursor: pointer; transition: var(--transition); white-space: nowrap; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--text-secondary); }
.btn-ghost:hover { color: var(--text); background: #f1f5f9; }
.btn-outline { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn-outline:hover { background: var(--primary-light); }
.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-block { width: 100%; }
.btn-danger { background: #ef4444; color: #fff; }
.btn-danger:hover { background: #dc2626; }

/* ── Header ── */
.header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.85); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.header-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; height: 60px; display: flex; align-items: center; gap: 32px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.logo-icon { width: 36px; height: 36px; background: var(--primary); color: #fff; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 700; }
.logo-text { letter-spacing: -.3px; }
.nav { display: flex; gap: 4px; }
.nav-link { padding: 6px 14px; border-radius: var(--radius-sm); font-size: 14px; color: var(--text-secondary); transition: var(--transition); }
.nav-link:hover, .nav-link.active { color: var(--primary); background: var(--primary-light); }
.header-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }

/* ── Search ── */
.search-box { position: relative; display: flex; align-items: center; }
.search-icon { position: absolute; left: 12px; width: 16px; height: 16px; color: #94a3b8; pointer-events: none; }
.search-box input { padding: 8px 12px 8px 36px; border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: 13px; outline: none; transition: var(--transition); background: #f8fafc; width: 200px; }
.search-box input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,.1); background: #fff; }
.header-search input { width: 180px; }
.search-box-lg { display: flex; gap: 0; }
.search-box-lg input { flex: 1; padding: 14px 16px 14px 44px; font-size: 15px; border-radius: var(--radius) 0 0 var(--radius); border: 2px solid var(--border); background: #fff; }
.search-box-lg input:focus { border-color: var(--primary); }
.search-box-lg .btn { border-radius: 0 var(--radius) var(--radius) 0; padding: 14px 28px; font-size: 15px; }

/* ── Hero ── */
.hero { background: linear-gradient(135deg, #eef2ff 0%, #faf5ff 50%, #fdf2f8 100%); padding: 60px 0 40px; overflow: hidden; }
.hero-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; gap: 48px; }
.hero-content { flex: 1; }
.hero h1 { font-size: 42px; line-height: 1.2; font-weight: 800; margin-bottom: 12px; letter-spacing: -.5px; }
.hero-highlight { color: var(--primary); }
.hero-sub { color: var(--text-secondary); font-size: 16px; margin-bottom: 28px; }
.hero-search { max-width: 560px; }
.hero-visual { flex-shrink: 0; width: 280px; height: 220px; display: flex; align-items: center; justify-content: center; }
.hero-3d { width: 200px; height: 180px; background: linear-gradient(135deg, var(--primary), #8b5cf6); border-radius: 20px; display: flex; align-items: center; justify-content: center; box-shadow: 0 20px 40px rgba(99,102,241,.3); position: relative; animation: float 3s ease-in-out infinite; }
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }
.hero-screen { width: 140px; height: 110px; background: #1e293b; border-radius: 10px; display: flex; flex-direction: column; align-items: center; justify-content: center; position: relative; }
.screen-code { color: #22d3ee; font-family: monospace; font-size: 14px; font-weight: 600; }
.screen-star { position: absolute; top: -12px; right: -12px; font-size: 28px; animation: spin 4s linear infinite; }
@keyframes spin { from{transform:rotate(0)} to{transform:rotate(360deg)} }
.hot-tags { margin-top: 16px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.hot-label { font-size: 13px; color: var(--text-secondary); }
.tag-chip { padding: 4px 12px; border: 1px solid var(--border); border-radius: 20px; font-size: 12px; background: #fff; color: var(--text-secondary); cursor: pointer; transition: var(--transition); }
.tag-chip:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }

/* ── Sections ── */
.section { padding: 32px 0; }
.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.section-header h2 { font-size: 20px; font-weight: 700; }
.see-all { color: var(--primary); font-size: 14px; font-weight: 500; }
.see-all:hover { text-decoration: underline; }
.result-count { color: var(--text-secondary); font-size: 13px; }

/* ── Category Grid ── */
.category-grid { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.cat-card { display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 16px 12px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); cursor: pointer; transition: var(--transition); min-width: 90px; flex: 1; max-width: 120px; }
.cat-card:hover { border-color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow); }
.cat-card.active { border-color: var(--primary); background: var(--primary-light); }
.cat-card .cat-icon { font-size: 28px; }
.cat-card .cat-name { font-size: 12px; color: var(--text-secondary); font-weight: 500; }
.cat-card.active .cat-name { color: var(--primary); }

/* ── Prompt Cards ── */
.prompt-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.prompt-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; transition: var(--transition); cursor: pointer; display: flex; flex-direction: column; }
.prompt-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: #c7d2fe; }
.prompt-card-title { font-size: 15px; font-weight: 600; margin-bottom: 8px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.prompt-card-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.5; flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 12px; }
.prompt-card-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.prompt-tag { padding: 2px 8px; border-radius: 4px; font-size: 11px; background: var(--primary-light); color: var(--primary); font-weight: 500; }
.prompt-card-footer { display: flex; align-items: center; justify-content: space-between; padding-top: 12px; border-top: 1px solid #f1f5f9; }
.prompt-author { font-size: 12px; color: var(--text-secondary); }
.prompt-rating { font-size: 12px; color: #f59e0b; }
.prompt-stats { display: flex; gap: 12px; font-size: 12px; color: #94a3b8; }
.prompt-copy-btn { padding: 5px 14px; background: var(--primary); color: #fff; border: none; border-radius: 6px; font-size: 12px; cursor: pointer; transition: var(--transition); font-weight: 500; }
.prompt-copy-btn:hover { background: var(--primary-hover); }

/* ── Rankings ── */
.rankings-banner { background: linear-gradient(135deg, #6366f1, #8b5cf6); border-radius: var(--radius); padding: 32px 40px; display: flex; align-items: center; justify-content: space-between; color: #fff; margin-bottom: 24px; }
.rankings-text h2 { font-size: 24px; margin-bottom: 4px; }
.rankings-text p { font-size: 15px; opacity: .9; }
.rankings-sub { font-size: 13px; opacity: .7; }
.podium { display: flex; align-items: flex-end; gap: 8px; }
.podium-item { width: 60px; border-radius: 8px 8px 0 0; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; padding-bottom: 10px; }
.podium-item.first { height: 80px; background: linear-gradient(180deg, #fbbf24, #f59e0b); }
.podium-item.second { height: 60px; background: linear-gradient(180deg, #94a3b8, #64748b); }
.podium-item.third { height: 45px; background: linear-gradient(180deg, #cd7c2f, #b45309); }
.podium-num { font-size: 18px; font-weight: 800; color: #fff; }
.podium-crown { font-size: 20px; margin-bottom: 4px; }
.ranking-list { display: grid; gap: 8px; }
.rank-item { display: flex; align-items: center; gap: 16px; padding: 12px 16px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); transition: var(--transition); }
.rank-item:hover { border-color: var(--primary); }
.rank-num { width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 700; flex-shrink: 0; }
.rank-num.top1 { background: #fef3c7; color: #d97706; }
.rank-num.top2 { background: #f1f5f9; color: #475569; }
.rank-num.top3 { background: #fed7aa; color: #c2410c; }
.rank-num.other { background: #f8fafc; color: #94a3b8; }
.rank-title { flex: 1; font-size: 14px; font-weight: 500; }
.rank-meta { font-size: 12px; color: #94a3b8; white-space: nowrap; }

/* ── Footer ── */
.footer { background: #1e293b; color: #cbd5e1; padding: 48px 0 0; margin-top: 40px; }
.footer-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; display: flex; gap: 48px; flex-wrap: wrap; }
.footer-brand { max-width: 280px; }
.footer-brand .logo { margin-bottom: 12px; }
.footer-brand .logo-icon { background: #6366f1; }
.footer-brand .logo-text { color: #fff; }
.footer-brand p { font-size: 13px; line-height: 1.7; color: #94a3b8; margin-bottom: 16px; }
.social-icons { display: flex; gap: 12px; font-size: 20px; }
.social-icons a { transition: var(--transition); }
.social-icons a:hover { transform: scale(1.2); }
.footer-links { flex: 1; display: flex; gap: 40px; flex-wrap: wrap; }
.footer-col h4 { color: #fff; font-size: 14px; margin-bottom: 12px; }
.footer-col a { display: block; font-size: 13px; color: #94a3b8; padding: 3px 0; transition: var(--transition); }
.footer-col a:hover { color: #fff; }
.footer-small { font-size: 12px; color: #64748b; margin-bottom: 8px; }
.subscribe-form { display: flex; gap: 6px; }
.subscribe-form input { flex: 1; padding: 6px 10px; border: 1px solid #334155; border-radius: 6px; background: #0f172a; color: #e2e8f0; font-size: 12px; }
.footer-bottom { text-align: center; padding: 20px; margin-top: 32px; border-top: 1px solid #334155; font-size: 12px; color: #64748b; }

/* ── Modals ── */
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 1000; align-items: center; justify-content: center; backdrop-filter: blur(4px); }
.modal-overlay.show { display: flex; }
.modal { background: var(--surface); border-radius: 16px; padding: 28px; width: 420px; max-height: 90vh; overflow-y: auto; position: relative; box-shadow: 0 25px 50px rgba(0,0,0,.15); }
.modal-lg { width: 760px; }
.modal-close { position: absolute; top: 16px; right: 16px; width: 32px; height: 32px; border: none; background: #f1f5f9; border-radius: 50%; font-size: 18px; cursor: pointer; display: flex; align-items: center; justify-content: center; color: #64748b; transition: var(--transition); }
.modal-close:hover { background: #e2e8f0; }
.modal h3 { font-size: 18px; margin-bottom: 20px; }

/* ── Forms ── */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--text-secondary); margin-bottom: 4px; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: 14px; outline: none; transition: var(--transition); font-family: inherit; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,.1); }
.form-row { display: flex; gap: 12px; }
.form-row .form-group { flex: 1; }
.form-error { color: #ef4444; font-size: 13px; margin-bottom: 10px; min-height: 18px; }
.form-hint { text-align: center; font-size: 12px; color: var(--text-secondary); margin-top: 12px; }

/* ── OAuth Buttons ── */
.oauth-buttons { display: flex; flex-direction: column; gap: 10px; margin-bottom: 16px; }
.oauth-btn { display: flex; align-items: center; justify-content: center; gap: 10px; width: 100%; padding: 11px 16px; border-radius: var(--radius-sm); font-size: 14px; font-weight: 500; cursor: pointer; transition: var(--transition); text-decoration: none; border: 1px solid var(--border); background: var(--surface); color: var(--text); }
.oauth-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.oauth-github:hover { border-color: #24292e; background: #24292e; color: #fff; }
.oauth-google:hover { border-color: #4285F4; background: #fff; }
.divider { display: flex; align-items: center; text-align: center; margin-bottom: 16px; color: var(--text-secondary); font-size: 13px; }
.divider::before, .divider::after { content: ''; flex: 1; border-bottom: 1px solid var(--border); }
.divider span { padding: 0 12px; }

/* ── User Avatar ── */
.user-avatar { width: 28px; height: 28px; border-radius: 50%; object-fit: cover; border: 2px solid var(--border); }

/* ── Toast ── */
.toast-container { position: fixed; top: 80px; right: 24px; z-index: 2000; display: flex; flex-direction: column; gap: 8px; }
.toast { padding: 12px 20px; border-radius: var(--radius-sm); font-size: 13px; font-weight: 500; color: #fff; animation: slideIn .3s ease; box-shadow: var(--shadow-lg); }
.toast-success { background: #10b981; }
.toast-error { background: #ef4444; }
.toast-info { background: var(--primary); }
@keyframes slideIn { from{transform:translateX(100%);opacity:0} to{transform:translateX(0);opacity:1} }

/* ── FAB ── */
.fab { position: fixed; bottom: 32px; right: 32px; width: 56px; height: 56px; border-radius: 50%; background: var(--primary); color: #fff; border: none; font-size: 28px; cursor: pointer; box-shadow: 0 8px 24px rgba(99,102,241,.4); transition: var(--transition); z-index: 200; display: flex; align-items: center; justify-content: center; }
.fab:hover { transform: scale(1.1) rotate(90deg); background: var(--primary-hover); }

/* ── Pagination ── */
.pagination { display: flex; justify-content: center; gap: 6px; margin-top: 24px; }
.page-btn { padding: 6px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: #fff; font-size: 13px; cursor: pointer; transition: var(--transition); }
.page-btn:hover { border-color: var(--primary); color: var(--primary); }
.page-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ── Detail Modal ── */
.detail-title { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.detail-meta { font-size: 13px; color: var(--text-secondary); margin-bottom: 16px; display: flex; gap: 16px; }
.detail-content { background: #f8fafc; border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px; font-size: 14px; line-height: 1.7; white-space: pre-wrap; font-family: "SF Mono", "Fira Code", monospace; margin-bottom: 16px; max-height: 400px; overflow-y: auto; }
.detail-actions { display: flex; gap: 8px; }

/* ── Image Gallery ── */
.prompt-card-cover { width: 100%; height: 220px; border-radius: var(--radius-sm); object-fit: cover; margin-bottom: 12px; border: 1px solid var(--border); }
.prompt-card .image-badge { position: absolute; top: 8px; right: 8px; background: rgba(0,0,0,.6); color: #fff; padding: 2px 8px; border-radius: 12px; font-size: 11px; }
.prompt-card { position: relative; }
.detail-images { display: flex; flex-direction: column; gap: 16px; margin-bottom: 20px; }
.detail-images:empty { display: none; }
.detail-img-wrap { position: relative; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); background: #f1f5f9; }
.detail-img-wrap img { width: 100%; height: 420px; object-fit: cover; cursor: pointer; transition: var(--transition); display: block; }
.detail-img-wrap img:hover { transform: scale(1.03); }
.detail-img-del { position: absolute; top: 6px; right: 6px; width: 24px; height: 24px; border-radius: 50%; background: rgba(0,0,0,.5); color: #fff; border: none; cursor: pointer; font-size: 14px; display: flex; align-items: center; justify-content: center; opacity: 0; transition: var(--transition); }
.detail-img-wrap:hover .detail-img-del { opacity: 1; }
.image-upload-area { border: 2px dashed var(--border); border-radius: var(--radius-sm); padding: 24px; text-align: center; cursor: pointer; transition: var(--transition); color: var(--text-secondary); font-size: 13px; margin-bottom: 16px; position: relative; }
.image-upload-area:hover { border-color: var(--primary); background: var(--primary-light); color: var(--primary); }
.image-upload-area.drag-over { border-color: var(--primary); background: var(--primary-light); color: var(--primary); transform: scale(1.01); box-shadow: 0 0 20px rgba(99,102,241,0.15); }
.image-upload-area.drag-over::after { content: '🎯 松开即可上传'; display: block; margin-top: 6px; font-size: 14px; font-weight: 600; color: var(--primary); }
.image-upload-area input[type=file] { display: none; }
.image-preview-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.image-preview-item { position: relative; width: 80px; height: 80px; border-radius: 8px; overflow: hidden; border: 1px solid var(--border); }
.image-preview-item img { width: 100%; height: 100%; object-fit: cover; }
.preview-remove { position: absolute; top: 2px; right: 2px; width: 20px; height: 20px; border-radius: 50%; background: rgba(0,0,0,.6); color: #fff; border: none; cursor: pointer; font-size: 13px; line-height: 18px; text-align: center; opacity: 0; transition: opacity .2s; }
.image-preview-item:hover .preview-remove { opacity: 1; }

/* ── Image Lightbox ── */
.lightbox-overlay { display: none; position: fixed; inset: 0; z-index: 9999; background: rgba(0,0,0,.92); backdrop-filter: blur(8px); align-items: center; justify-content: center; cursor: pointer; animation: fadeIn .2s ease; }
.lightbox-overlay.show { display: flex; }
.lightbox-img { max-width: 92vw; max-height: 88vh; object-fit: contain; border-radius: 8px; box-shadow: 0 20px 60px rgba(0,0,0,.5); cursor: pointer; user-select: none; -webkit-user-drag: none; }
.lightbox-close { position: absolute; top: 20px; right: 24px; width: 44px; height: 44px; border-radius: 50%; border: 2px solid rgba(255,255,255,.3); background: rgba(0,0,0,.4); color: #fff; font-size: 26px; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all .2s ease; z-index: 10; line-height: 1; padding: 0; } .lightbox-close:hover { background: rgba(255,255,255,.15); border-color: rgba(255,255,255,.6); transform: scale(1.1); }
.lightbox-hint { position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%); color: rgba(255,255,255,.5); font-size: 13px; pointer-events: none; }
@keyframes fadeIn { from { opacity: 0 } to { opacity: 1 } }

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero-inner { flex-direction: column; text-align: center; }
  .hero h1 { font-size: 28px; }
  .hero-visual { display: none; }
  .hero-search { max-width: 100%; }
  .search-box-lg { flex-direction: column; }
  .search-box-lg input { border-radius: var(--radius); }
  .search-box-lg .btn { border-radius: var(--radius); }
  .header-search { display: none; }
  .nav { display: none; }
  .prompt-grid { grid-template-columns: 1fr; }
  .detail-images { grid-template-columns: 1fr; }
  .detail-img-wrap img { height: 240px; }
  .footer-inner { flex-direction: column; gap: 32px; }
  .footer-links { flex-direction: column; gap: 24px; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .category-grid { gap: 8px; }
  .cat-card { min-width: 70px; padding: 12px 8px; }
}