/* ================================================================
   CCF Timeline - Stylesheet
   Design: Clean, modern, card-based layout with CCF rank colors
   ================================================================ */

/* --- CSS Custom Properties --- */
:root {
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    --color-primary: #3b82f6;
    --color-primary-light: #eff6ff;

    /* CCF Rank Colors */
    --rank-a: #dc2626;
    --rank-a-bg: #fef2f2;
    --rank-a-border: #fecaca;
    --rank-b: #ea580c;
    --rank-b-bg: #fff7ed;
    --rank-b-border: #fed7aa;
    --rank-c: #16a34a;
    --rank-c-bg: #f0fdf4;
    --rank-c-border: #bbf7d0;

    /* Journal type badge */
    --badge-journal-type: #7c3aed;
    --badge-journal-type-bg: #f5f3ff;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);

    /* Spacing */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;

    /* Transitions */
    --transition: 150ms ease;

    /* Font */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;
}

/* --- Dark Mode --- */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #0f172a;
        --color-surface: #1e293b;
        --color-border: #334155;
        --color-text: #f1f5f9;
        --color-text-secondary: #94a3b8;
        --color-text-muted: #64748b;
        --color-primary: #60a5fa;
        --color-primary-light: #172554;

        --rank-a-bg: #450a0a;
        --rank-a-border: #7f1d1d;
        --rank-b-bg: #431407;
        --rank-b-border: #7c2d12;
        --rank-c-bg: #052e16;
        --rank-c-border: #14532d;
        --badge-journal-type-bg: #2e1065;

        --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
        --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
        --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4);
    }
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

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

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

/* --- Header --- */
.header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.header-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon { font-size: 28px; }

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    font-family: var(--font-sans);
}

.btn:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
}

.btn-sm { padding: 6px 10px; font-size: 0.8rem; }
.btn-ghost { border-color: transparent; background: transparent; }

.lang-toggle {
    font-weight: 600;
    min-width: 52px;
}
.lang-divider { opacity: 0.3; }

/* --- Filter Bar --- */
.filter-bar {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 57px;
    z-index: 99;
}

.filter-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

/* --- Search --- */
.search-box {
    position: relative;
    flex: 1;
    min-width: 200px;
    max-width: 360px;
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 8px 12px 8px 36px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 0.875rem;
    font-family: var(--font-sans);
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}

.search-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

/* --- Toggle Groups --- */
.toggle-group {
    display: flex;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.toggle-btn {
    padding: 6px 14px;
    border: none;
    background: var(--color-surface);
    color: var(--color-text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    border-right: 1px solid var(--color-border);
    font-family: var(--font-sans);
    white-space: nowrap;
}

.toggle-btn:last-child { border-right: none; }

.toggle-btn:hover { background: var(--color-primary-light); }

.toggle-btn.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* Rank-specific active states */
.toggle-btn.rank-a.active { background: var(--rank-a); border-color: var(--rank-a); }
.toggle-btn.rank-b.active { background: var(--rank-b); border-color: var(--rank-b); }
.toggle-btn.rank-c.active { background: var(--rank-c); border-color: var(--rank-c); }

/* --- Select --- */
.select-filter {
    padding: 6px 32px 6px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    font-family: var(--font-sans);
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    outline: none;
    transition: border-color var(--transition);
}

.select-filter:focus {
    border-color: var(--color-primary);
}

/* --- Stats Bar --- */
.stats-bar {
    max-width: 1280px;
    margin: 0 auto;
    padding: 8px 20px;
    color: var(--color-text-secondary);
    font-size: 0.8rem;
}

/* --- Card Grid --- */
.card-grid {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px 40px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 14px;
    flex: 1;
}

/* --- Venue Card --- */
.venue-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 16px;
    transition: all var(--transition);
    cursor: pointer;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.venue-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

.venue-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 8px;
}

.venue-card-title {
    flex: 1;
    min-width: 0;
}

.venue-abbr {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.01em;
}

.venue-full-name {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-top: 2px;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.venue-badges {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
    flex-wrap: wrap;
    align-items: flex-start;
}

/* --- Badge --- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 9999px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.badge-rank {
    border: 1.5px solid;
}

.badge-a {
    color: var(--rank-a);
    background: var(--rank-a-bg);
    border-color: var(--rank-a-border);
}

.badge-b {
    color: var(--rank-b);
    background: var(--rank-b-bg);
    border-color: var(--rank-b-border);
}

.badge-c {
    color: var(--rank-c);
    background: var(--rank-c-bg);
    border-color: var(--rank-c-border);
}

.badge-category {
    color: var(--color-text-secondary);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    font-weight: 500;
}

.badge-journal-type {
    color: var(--badge-journal-type);
    background: var(--badge-journal-type-bg);
    border: 1px solid var(--badge-journal-type);
    font-size: 0.65rem;
}

.badge-website {
    color: #2563eb;
    background: #eff6ff;
    border: 1px solid #93c5fd;
    font-size: 0.7rem;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition);
}
.badge-website:hover {
    background: #2563eb;
    color: #fff;
    text-decoration: none;
}

@media (prefers-color-scheme: dark) {
    .badge-website {
        color: #60a5fa;
        background: #1e3a5f;
        border-color: #3b82f6;
    }
    .badge-website:hover {
        background: #3b82f6;
        color: #fff;
    }
}

/* --- Timeline Section --- */
.venue-timeline {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.timeline-round-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding: 2px 8px;
    border-radius: 4px;
    display: inline-block;
    margin-top: 4px;
}

.timeline-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.78rem;
}

.timeline-label {
    color: var(--color-text-muted);
    min-width: 55px;
    flex-shrink: 0;
    font-weight: 500;
}

.timeline-value {
    color: var(--color-text);
    font-weight: 500;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.timeline-value.urgent { color: var(--rank-a); font-weight: 700; }
.timeline-value.upcoming { color: var(--rank-b); }
.timeline-value.past { color: var(--color-text-muted); text-decoration: line-through; }

.timeline-no-data {
    color: var(--color-text-muted);
    font-size: 0.78rem;
    font-style: italic;
}

/* Timeline Bar (Visual) */
.timeline-bar {
    display: flex;
    align-items: center;
    gap: 0;
    height: 6px;
    border-radius: 3px;
    background: var(--color-border);
    overflow: hidden;
    margin-top: 4px;
}

.timeline-bar-segment {
    height: 100%;
    transition: width var(--transition);
}

.timeline-bar-segment.sub { background: var(--rank-c); }
.timeline-bar-segment.review { background: var(--rank-b); }
.timeline-bar-segment.final { background: var(--rank-a); }

/* --- Website Link --- */
.website-link {
    display: inline-flex;
    align-items: center;
    font-size: 0.7rem;
    text-decoration: none;
    opacity: 0.5;
    transition: opacity var(--transition);
    margin-left: 4px;
    vertical-align: middle;
}
.website-link:hover {
    opacity: 1;
    text-decoration: none;
}

/* --- Statistics --- */
.venue-stats {
    border-top: 1px solid var(--color-border);
    padding-top: 8px;
    margin-top: 2px;
}

.stats-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.stat-item {
    font-size: 0.72rem;
    color: var(--color-text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

.stat-rate {
    color: var(--color-primary);
    font-weight: 700;
}

/* --- Empty & Loading States --- */
.empty-state, .loading-state {
    text-align: center;
    padding: 80px 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.empty-icon { font-size: 48px; }

.empty-state h2 {
    color: var(--color-text);
    font-size: 1.25rem;
}

.empty-state p {
    color: var(--color-text-secondary);
}

.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* --- Footer --- */
.footer {
    text-align: center;
    padding: 20px;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    border-top: 1px solid var(--color-border);
}

.footer p { margin: 4px 0; }

/* --- Responsive --- */
@media (max-width: 768px) {
    .card-grid {
        grid-template-columns: 1fr;
        gap: 10px;
        padding: 0 12px 30px;
    }

    .filter-inner {
        padding: 8px 12px;
        gap: 8px;
    }

    .search-box {
        min-width: 100%;
        max-width: 100%;
        order: -1;
    }

    .toggle-btn {
        padding: 5px 10px;
        font-size: 0.75rem;
    }

    .header-inner {
        padding: 10px 12px;
    }

    .logo-text { font-size: 1.1rem; }

    .venue-card { padding: 12px; }
}

@media (max-width: 480px) {
    .filter-inner {
        flex-direction: column;
        align-items: stretch;
    }

    .toggle-group {
        width: 100%;
    }

    .toggle-btn {
        flex: 1;
        text-align: center;
    }

    .select-filter {
        width: 100%;
    }
}

/* --- Countdown Badge --- */
.countdown-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 9999px;
    font-size: 0.7rem;
    font-weight: 700;
    margin-top: 4px;
}
.cd-urgent { background: #fef2f2; color: #dc2626; border: 1px solid #fecaca; animation: pulse 2s infinite; }
.cd-soon { background: #fff7ed; color: #ea580c; border: 1px solid #fed7aa; }
.cd-ok { background: #f0fdf4; color: #16a34a; border: 1px solid #bbf7d0; }
.cd-overdue { background: #f1f5f9; color: #94a3b8; border: 1px solid #e2e8f0; }

@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:0.6; } }

/* --- Gantt Timeline View --- */
.gantt-view {
    max-width:100%; margin:0; padding:0; flex:1;
    display:flex; flex-direction:column;
    overflow:hidden;
}
.gantt-title { font-size:1rem; font-weight:700; padding:10px 20px 0; color:var(--color-text); flex-shrink:0; }
.gantt-legend { font-size:0.72rem; color:var(--color-text-secondary); padding:4px 20px 8px; display:flex; gap:12px; flex-wrap:wrap; align-items:center; flex-shrink:0; }
.gleg { font-size:0.68rem; }
.gleg.sub { color: #16a34a; }
.gleg.review { color: #ea580c; }
.gleg.conf { color: #7c3aed; }

/* Scrollable container: sticky left label + scroll right */
.gantt-scroll-wrap { flex:1; overflow:hidden; display:flex; flex-direction:column; }
.gantt-months { display:flex; border-bottom:1px solid var(--color-border); padding:4px 0; font-size:0.65rem; color:var(--color-text-muted); font-weight:600; background:var(--color-bg); flex-shrink:0; }
.gantt-months-sticky { width:210px; min-width:210px; flex-shrink:0; }
.gantt-months-scroll { flex:1; overflow-x:auto; display:flex; }
.gantt-months-scroll span { display:inline-block; width:calc(100%/12); text-align:center; flex-shrink:0; min-width:50px; }

.gantt-body-scroll { flex:1; overflow-y:auto; overflow-x:hidden; }
.gantt-row { display:flex; align-items:center; border-bottom:1px solid var(--color-border); padding:4px 0; min-height:40px; transition:background var(--transition); min-width:900px; }
.gantt-row:hover { background:var(--color-primary-light); }
.gantt-row.gantt-a { border-left:3px solid var(--rank-a); }
.gantt-row.gantt-b { border-left:3px solid var(--rank-b); }
.gantt-row.gantt-c { border-left:3px solid var(--rank-c); }

.gantt-label { width:210px; min-width:210px; padding:0 8px; display:flex; align-items:center; gap:4px; flex-shrink:0; font-size:0.78rem; overflow:hidden; }
.gantt-bars { flex:1; padding:0 4px; position:relative; height:20px; min-width:600px; }
.gantt-dates { width:160px; min-width:160px; font-size:0.6rem; color:var(--color-text-muted); display:flex; flex-direction:column; gap:1px; flex-shrink:0; }

.gantt-seg { position:absolute; height:100%; border-radius:3px; top:0; min-width:3px; }
.gantt-seg.submission { background:linear-gradient(90deg,#86efac,#4ade80); opacity:0.85; z-index:1; }
.gantt-seg.review { background:linear-gradient(90deg,#fdba74,#fb923c); opacity:0.85; z-index:1; }
.gantt-marker { position:absolute; font-size:9px; transform:translateX(-50%); z-index:2; cursor:help; }
.gantt-marker.sub-marker { color:#16a34a; top:-8px; }
.gantt-marker.notif-marker { color:#ea580c; top:50%; transform:translate(-50%,-50%); font-size:6px; }
.gantt-marker.conf-marker { color:#7c3aed; top:-8px; }

/* Sync horizontal scroll between months header and body */
.gantt-months-scroll::-webkit-scrollbar { height:6px; }
.gantt-months-scroll::-webkit-scrollbar-track { background:transparent; }
.gantt-months-scroll::-webkit-scrollbar-thumb { background:var(--color-border); border-radius:3px; }
.gantt-body-scroll::-webkit-scrollbar { width:6px; }
.gantt-body-scroll::-webkit-scrollbar-track { background:transparent; }
.gantt-body-scroll::-webkit-scrollbar-thumb { background:var(--color-border); border-radius:3px; }

@media (prefers-color-scheme:dark) {
    .gantt-seg.submission { background:linear-gradient(90deg,#166534,#22c55e); }
    .gantt-seg.review { background:linear-gradient(90deg,#7c2d12,#f97316); }
}

@media (max-width:768px) {
    .gantt-label { width:110px; min-width:110px; font-size:0.68rem; }
    .gantt-dates { display:none; }
    .gantt-months-sticky { width:110px; min-width:110px; }
}

/* --- Vertical Timeline View --- */
.vertical-view { width:100%; max-width:100%; margin:0; padding:0; flex:1; display:flex; flex-direction:column; overflow:hidden; }
.vertical-header { flex-shrink:0; position:sticky; top:0; z-index:10; background:var(--color-bg); border-bottom:1px solid var(--color-border); }
.vertical-body { flex:1; overflow-y:auto; padding:0 8px 40px; }
.vt-container { display:flex; gap:24px; }
.vt-column { flex:1; min-width:350px; }
.vt-year-title { font-size:0.85rem; font-weight:700; text-align:center; padding:8px 0; background:var(--color-primary); color:#fff; border-radius:6px 6px 0 0; position:sticky; top:0; z-index:2; }

.vt-timeline-single { position:relative; }
.vt-centerline { position:absolute; left:50%; top:0; bottom:0; width:2px; background:var(--color-border); z-index:0; }
.vt-month-marker { position:absolute; left:50%; transform:translateX(-50%); font-size:0.55rem; color:var(--color-text-muted); background:var(--color-bg); padding:2px 6px; white-space:nowrap; z-index:1; }
.vt-now-marker { position:absolute; left:0; right:0; border-top:2px dashed var(--rank-a); opacity:0.5; z-index:3; pointer-events:none; }

.vt-entry-left, .vt-entry-right { position:absolute; font-size:0.65rem; display:flex; align-items:center; gap:4px; white-space:nowrap; }
.vt-entry-left { right:50%; margin-right:12px; text-align:right; flex-direction:row; }
.vt-entry-right { left:50%; margin-left:12px; text-align:left; flex-direction:row-reverse; }
.vt-entry-date { font-size:0.55rem; color:var(--color-text-muted); flex-shrink:0; }
.vt-entry-left .vt-entry-label { color:#166534; font-weight:600; }
.vt-entry-right .vt-entry-label { color:#9a3412; font-weight:600; }
.vt-row { display:flex; align-items:center; padding:3px 8px; gap:8px; font-size:0.72rem; border-bottom:1px solid var(--color-border); }
.vt-row:hover { background:var(--color-primary-light); }
.vt-row-past { opacity:0.5; }
.vt-row-now { background:var(--rank-a-bg); font-weight:700; }
.vt-row-date { color:var(--color-text-muted); font-size:0.65rem; min-width:55px; flex-shrink:0; }
.vt-row-name { color:var(--color-text); overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }

@media (max-width:768px) {
    .vt-container { flex-direction:column; gap:16px; }
    .vt-column { min-width:auto; }
}

/* --- Print --- */
/* --- Vertical Timeline View --- */
}

/* --- Print --- */
@media print {
    .header, .filter-bar, .footer { display: none; }
    .card-grid { display: block; }
    .venue-card { break-inside: avoid; margin-bottom: 10px; }
}