:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --danger: #dc2626;
    --bg: #f0f4f8;
    --card-bg: #fff;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --radius: 10px;
    --radius-sm: 6px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; }

.btn-primary { background: var(--primary); color: #fff; border: none; border-radius: var(--radius-sm); padding: 10px 20px; cursor: pointer; font-size: .9rem; transition: background .2s; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-lg { padding: 14px 32px; font-size: 1rem; }
.btn-secondary { background: #64748b; color: #fff; border: none; border-radius: var(--radius-sm); padding: 10px 20px; cursor: pointer; font-size: .9rem; }
.btn-secondary:hover { background: #475569; }
.btn-sm { background: var(--primary); color: #fff; border: none; border-radius: var(--radius-sm); padding: 6px 14px; cursor: pointer; font-size: .8rem; }
.btn-danger { background: var(--danger); color: #fff; border: none; border-radius: var(--radius-sm); padding: 10px 20px; cursor: pointer; font-size: .9rem; }
.btn-danger-sm { background: var(--danger); color: #fff; border: none; border-radius: var(--radius-sm); padding: 6px 14px; cursor: pointer; font-size: .8rem; }

.alert-danger { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; border-radius: var(--radius-sm); padding: 12px 16px; margin-bottom: 16px; }

input[type="text"], input[type="number"], input[type="email"] { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: .95rem; }
input[type="file"] { display: none; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: .9rem; color: var(--text-light); }

.home-hero { text-align: center; padding: 48px 20px 24px; }
.home-hero h1 { font-size: 2.5rem; color: var(--primary); margin-bottom: 8px; }
.hero-sub { color: var(--text-light); font-size: 1.1rem; }

.home-cards { display: flex; gap: 24px; max-width: 800px; margin: 0 auto; padding: 0 20px 40px; flex-wrap: wrap; }
.home-card { flex: 1; min-width: 300px; background: var(--card-bg); border-radius: var(--radius); padding: 28px; box-shadow: 0 1px 3px rgba(0,0,0,.08); }
.home-card h2 { font-size: 1.2rem; margin-bottom: 20px; color: var(--primary); }

.room-body { background: var(--bg); }
.room-header { display: flex; align-items: center; justify-content: space-between; background: var(--card-bg); padding: 12px 20px; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.room-logo { font-weight: 700; font-size: 1.1rem; color: var(--primary); text-decoration: none; }
.room-title { font-size: 1.1rem; font-weight: 600; }
.room-header-right { display: flex; align-items: center; gap: 12px; }
.room-nick { font-size: .85rem; color: var(--text-light); }

.room-nav { display: flex; background: var(--card-bg); border-bottom: 1px solid var(--border); padding: 0 20px; gap: 4px; }
.room-nav-link { padding: 12px 20px; text-decoration: none; color: var(--text-light); font-size: .9rem; font-weight: 500; border-bottom: 2px solid transparent; transition: all .2s; }
.room-nav-link:hover { color: var(--primary); }
.room-nav-link.active { color: var(--primary); border-bottom-color: var(--primary); }

.room-main { max-width: 960px; margin: 0 auto; padding: 20px; }

.album-toolbar { display: flex; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; align-items: center; }
.upload-form { display: inline; }

.album-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.album-item { position: relative; background: var(--card-bg); border-radius: var(--radius); overflow: hidden; box-shadow: 0 1px 3px rgba(0,0,0,.06); }
.album-item img { width: 100%; height: 180px; object-fit: cover; cursor: pointer; display: block; }
.video-thumb { position: relative; height: 180px; background: #000; cursor: pointer; }
.video-thumb video { width: 100%; height: 100%; object-fit: cover; }
.video-badge { position: absolute; bottom: 8px; left: 8px; background: rgba(0,0,0,.7); color: #fff; font-size: .7rem; padding: 2px 8px; border-radius: 4px; }
.album-check { position: absolute; top: 8px; left: 8px; z-index: 5; }
.album-check input { width: 18px; height: 18px; cursor: pointer; }
.album-item-info { padding: 8px 10px; display: flex; justify-content: space-between; font-size: .75rem; color: var(--text-light); }
.album-delete { position: absolute; top: 8px; right: 8px; z-index: 5; }
.album-delete button { background: rgba(220,38,38,.85); color: #fff; border: none; border-radius: 50%; width: 24px; height: 24px; cursor: pointer; font-size: 1rem; line-height: 1; }

.lightbox { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.9); z-index: 9999; align-items: center; justify-content: center; }
.lightbox.active { display: flex; }
.lightbox img { max-width: 95%; max-height: 95%; object-fit: contain; }
.lightbox-close { position: absolute; top: 16px; right: 24px; background: none; border: none; color: #fff; font-size: 2rem; cursor: pointer; }

.empty-state { text-align: center; color: var(--text-light); padding: 60px 20px; font-size: 1rem; }

.chat-container { display: flex; flex-direction: column; height: calc(100vh - 140px); }
.chat-messages { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 12px; background: var(--card-bg); border-radius: var(--radius); }
.chat-msg { max-width: 70%; }
.chat-msg.mine { align-self: flex-end; }
.chat-msg-nick { font-size: .75rem; color: var(--text-light); margin-bottom: 2px; }
.chat-msg.mine .chat-msg-nick { text-align: right; }
.chat-msg-bubble { background: #f1f5f9; padding: 10px 14px; border-radius: 12px; font-size: .95rem; word-wrap: break-word; }
.chat-msg.mine .chat-msg-bubble { background: var(--primary); color: #fff; }
.chat-msg-time { font-size: .7rem; color: #94a3b8; margin-top: 2px; }
.chat-msg.mine .chat-msg-time { text-align: right; }
.chat-input { display: flex; gap: 8px; padding: 12px 0; }
.chat-input input { flex: 1; }

.members-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 12px; }
.member-card { display: flex; align-items: center; gap: 12px; background: var(--card-bg); padding: 14px 16px; border-radius: var(--radius); box-shadow: 0 1px 3px rgba(0,0,0,.06); }
.member-avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 1.1rem; flex-shrink: 0; }
.member-info { flex: 1; }
.member-name { font-weight: 600; font-size: .95rem; }
.admin-badge { background: #fbbf24; color: #78350f; font-size: .7rem; padding: 1px 6px; border-radius: 4px; margin-left: 6px; }
.member-time { font-size: .75rem; color: var(--text-light); }

.modal { position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 999; align-items: center; justify-content: center; }
.modal-content { background: var(--card-bg); border-radius: var(--radius); width: 90%; max-width: 500px; max-height: 80vh; display: flex; flex-direction: column; }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.modal-header h3 { font-size: 1rem; margin: 0; }
.modal-close { background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--text-light); }
.dm-messages { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 8px; min-height: 200px; }
.dm-msg.mine { align-self: flex-end; }
.dm-bubble { background: #f1f5f9; padding: 8px 12px; border-radius: 10px; font-size: .9rem; max-width: 80%; word-wrap: break-word; }
.dm-msg.mine .dm-bubble { background: var(--primary); color: #fff; }
.dm-time { font-size: .65rem; color: #94a3b8; margin-top: 2px; }
.dm-input { display: flex; gap: 8px; padding: 12px 16px; border-top: 1px solid var(--border); }
.dm-input input { flex: 1; }
.empty-dm { text-align: center; color: var(--text-light); padding: 32px; }

.admin-section { display: flex; flex-direction: column; gap: 20px; }
.admin-card { background: var(--card-bg); border-radius: var(--radius); padding: 20px; box-shadow: 0 1px 3px rgba(0,0,0,.06); }
.admin-card h3 { margin-bottom: 12px; font-size: 1rem; }
.admin-card p { margin-bottom: 8px; font-size: .9rem; }
.room-token { background: #eff6ff; padding: 4px 10px; border-radius: 4px; font-family: monospace; font-size: 1.1rem; font-weight: 700; color: var(--primary); letter-spacing: 2px; }
.inline-form { display: flex; gap: 8px; align-items: center; }
.inline-form input { width: auto; max-width: 200px; }
.admin-table { width: 100%; border-collapse: collapse; }
.admin-table th, .admin-table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); font-size: .9rem; }
.danger-zone { border: 1px solid #fecaca; }

@media (max-width: 640px) {
    .home-cards { flex-direction: column; }
    .home-card { min-width: auto; }
    .album-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
    .album-item img, .video-thumb { height: 140px; }
    .members-grid { grid-template-columns: 1fr; }
    .chat-msg { max-width: 85%; }
}

.my-rooms { max-width: 800px; margin: 0 auto; padding: 0 20px 40px; }
.my-rooms-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.my-rooms-header h2 { font-size: 1.3rem; }
.my-rooms-header .btn-primary { text-decoration: none; }
.room-list { display: flex; flex-direction: column; gap: 12px; }
.room-list-item { display: flex; justify-content: space-between; align-items: center; background: var(--card-bg); padding: 18px 20px; border-radius: var(--radius); box-shadow: 0 1px 3px rgba(0,0,0,.06); }
.room-list-info h3 { font-size: 1.05rem; margin-bottom: 6px; }
.room-list-meta { display: flex; flex-wrap: wrap; gap: 12px; font-size: .8rem; color: var(--text-light); }
.expire-tag { color: #dc2626; font-weight: 600; }
.room-list-actions .btn-primary { text-decoration: none; }

.home-layout { display: flex; gap: 24px; max-width: 900px; margin: 0 auto; padding: 0 20px 40px; align-items: flex-start; }
.home-left { flex: 0 0 260px; }
.home-right { flex: 1; min-width: 0; }
.home-action-card { display: block; background: var(--card-bg); border-radius: var(--radius); padding: 32px 24px; text-align: center; text-decoration: none; color: var(--text); box-shadow: 0 1px 3px rgba(0,0,0,.06); transition: transform .2s, box-shadow .2s; }
.home-action-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,.1); }
.action-icon { font-size: 2rem; margin-bottom: 12px; }
.home-action-card h3 { font-size: 1.1rem; margin-bottom: 6px; }
.home-action-card p { font-size: .85rem; color: var(--text-light); }
.home-empty { background: var(--card-bg); border-radius: var(--radius); padding: 40px 24px; text-align: center; color: var(--text-light); box-shadow: 0 1px 3px rgba(0,0,0,.06); }
.home-empty p { margin-bottom: 4px; }
.my-rooms { background: var(--card-bg); border-radius: var(--radius); padding: 20px 24px; box-shadow: 0 1px 3px rgba(0,0,0,.06); }
.my-rooms h2 { font-size: 1.1rem; margin-bottom: 16px; color: var(--primary); }
.room-list-item { display: flex; align-items: center; justify-content: space-between; padding: 12px 0; border-bottom: 1px solid var(--border); }
.room-list-item:last-child { border-bottom: none; }
.room-list-info h3 { font-size: 1rem; margin-bottom: 4px; }
.room-list-meta { display: flex; flex-wrap: wrap; gap: 8px; font-size: .78rem; color: var(--text-light); }

@media (max-width: 640px) {
    .home-layout { flex-direction: column; }
    .home-left { flex: none; width: 100%; }
}

.create-page, .join-page { max-width: 500px; margin: 0 auto; padding: 40px 20px; }
.create-page h1, .join-page h1 { margin-bottom: 8px; }
.back-link { display: inline-block; margin-bottom: 20px; color: var(--primary); text-decoration: none; font-size: .9rem; }
.create-form, .join-form { background: var(--card-bg); border-radius: var(--radius); padding: 28px; box-shadow: 0 1px 3px rgba(0,0,0,.06); margin-top: 20px; }

.join-invalid { text-align: center; padding: 60px 20px; }
.join-invalid h1 { margin-bottom: 12px; }
.join-invalid p { color: var(--text-light); margin-bottom: 24px; }

.qr-section { display: flex; gap: 24px; align-items: flex-start; flex-wrap: wrap; }
.qr-box { flex-shrink: 0; }
.qr-info { flex: 1; min-width: 200px; }
.join-url-row { display: flex; gap: 8px; }
.join-url-input { flex: 1; padding: 8px 10px; border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: .8rem; font-family: monospace; background: #f8fafc; }

.itinerary-timeline { position: relative; padding-left: 24px; }
.itinerary-timeline::before { content: ''; position: absolute; left: 8px; top: 0; bottom: 0; width: 2px; background: var(--border); }
.timeline-item { position: relative; margin-bottom: 20px; }
.timeline-dot { position: absolute; left: -20px; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: var(--primary); border: 2px solid #fff; box-shadow: 0 0 0 2px var(--primary); }
.timeline-content { background: var(--card-bg); border-radius: var(--radius-sm); padding: 14px 16px; border: 1px solid var(--border); }
.timeline-content h3 { font-size: 1rem; margin-bottom: 2px; }