/* ──────────────────────────────────────────────────────────────
   style.css — Jadwal Lab UNIKOM (Sidebar & Theme Support)
────────────────────────────────────────────────────────────── */

/* === Design Tokens (Dark Theme Default) === */
:root {
    --bg-base:       #0d1117;
    --bg-surface:    #161b22;
    --bg-elevated:   #1c2333;
    --bg-hover:      #21262d;

    --accent-blue:   #388bfd;
    --accent-teal:   #39d353;
    --accent-amber:  #e3b341;
    --accent-red:    #f85149;

    --text-primary:  #e6edf3;
    --text-secondary:#8b949e;
    --text-muted:    #484f58;

    --border:        #30363d;
    --border-subtle: #21262d;

    --radius-sm:     6px;
    --radius-md:     10px;
    --radius-lg:     16px;
    --radius-xl:     24px;

    --shadow-sm:     0 1px 3px rgba(0,0,0,0.4);
    --shadow-md:     0 4px 16px rgba(0,0,0,0.5);
    --shadow-lg:     0 8px 32px rgba(0,0,0,0.6);

    --font-sans:     'Inter', -apple-system, sans-serif;
    --font-mono:     'JetBrains Mono', monospace;

    --transition:    0.2s ease;
    
    --sidebar-width: 260px;
}

/* === Light Theme Override === */
:root[data-theme="light"] {
    --bg-base:       #f6f8fa;
    --bg-surface:    #ffffff;
    --bg-elevated:   #f3f4f6;
    --bg-hover:      #eaeef2;

    --accent-blue:   #0969da;
    --accent-teal:   #1a7f37;
    --accent-amber:  #bf8700;
    --accent-red:    #d1242f;

    --text-primary:  #1f2328;
    --text-secondary:#656d76;
    --text-muted:    #8c959f;

    --border:        #d0d7de;
    --border-subtle: #e5e8eb;

    --shadow-sm:     0 1px 3px rgba(27,31,36,0.04);
    --shadow-md:     0 3px 6px rgba(27,31,36,0.15);
    --shadow-lg:     0 8px 24px rgba(27,31,36,0.12);
}

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-sans);
    background: var(--bg-base);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

/* === Layout: Sidebar + Main Content === */
.app-container {
    display: flex;
    min-height: 100vh;
    width: 100%;
}

.main-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0; /* Important for flex children to prevent overflow */
}

/* === Sidebar === */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: sticky;
    top: 0;
    z-index: 100;
    transition: transform var(--transition);
}

.sidebar-header {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 40px; 
    height: 40px;
    object-fit: contain;
}

.logo-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.logo-sub {
    font-size: 0.75rem;
    color: var(--accent-blue);
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.sidebar-clock {
    padding: 0 1.5rem 1.5rem 1.5rem;
    text-align: center;
    border-bottom: 1px solid var(--border-subtle);
}

.clock-time {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: 0.05em;
    line-height: 1;
}

.clock-date {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 4px;
    text-transform: capitalize;
}

.sidebar-controls {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.control-label {
    display: block;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.semester-info-box {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.65rem 0.85rem;
    text-align: center;
}

.semester-info-box span {
    color: var(--accent-blue);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.01em;
}

.sidebar-nav {
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    flex: 1;
    overflow-y: auto;
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-align: left;
    transition: all var(--transition);
}

.nav-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.nav-btn.active {
    background: rgba(56, 139, 253, 0.1);
    color: var(--accent-blue);
    font-weight: 600;
}

.mobile-only-btn { display: none; }

/* === Top Header (Main Wrapper - Mobile Only) === */
.top-header {
    height: 60px;
    padding: 0 1.5rem;
    display: none; /* Hidden by default on desktop */
    align-items: center;
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
    position: sticky;
    top: 0;
    z-index: 90;
    justify-content: space-between;
}

.mobile-logo-group {
    display: flex;
    align-items: center;
}

.mobile-logo-text {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
}

.mobile-menu-btn {
    display: block; /* It's only rendered when header is visible */
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
    margin-right: -0.5rem;
}

.theme-toggle-btn {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    width: 36px; height: 36px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    cursor: pointer;
    transition: all var(--transition);
}

.theme-toggle-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent-blue);
}

:root[data-theme="light"] .sun-icon { display: none; }
:root[data-theme="light"] .moon-icon { display: block; }
:root:not([data-theme="light"]) .sun-icon { display: block; }
:root:not([data-theme="light"]) .moon-icon { display: none; }

/* === Main Content Area === */
.main-content {
    padding: 2rem;
    flex: 1;
}

.tab-panel { display: none; animation: fadeIn 0.3s ease; }
.tab-panel.active { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* === Panel Header === */
.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.panel-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.panel-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* === View Toggle === */
.view-toggle {
    display: flex;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.25rem;
    gap: 0.25rem;
}

.toggle-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.4rem 0.85rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    font-family: var(--font-sans);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: all var(--transition);
}

.toggle-btn:hover { color: var(--text-primary); background: var(--bg-hover); }
.toggle-btn.active { background: var(--accent-blue); color: white; box-shadow: var(--shadow-sm); }

/* === Filter Bar === */
.filter-bar {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    align-items: flex-end;
    margin-bottom: 1.5rem;
}

.filter-group { display: flex; flex-direction: column; gap: 0.4rem; }
.filter-search { flex: 1; min-width: 250px; }

.filter-label {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.07em;
}

/* === Day Pills === */
.day-pills { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.day-pill {
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    background: var(--bg-elevated);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}

.day-pill:hover { border-color: var(--accent-blue); color: var(--accent-blue); }
.day-pill.active { background: var(--accent-blue); border-color: var(--accent-blue); color: white; }

/* === Form Controls === */
.select-control {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    padding: 0.5rem 0.85rem;
    cursor: pointer;
    outline: none;
    transition: border-color var(--transition);
    -webkit-appearance: none;
}

.select-control:focus { border-color: var(--accent-blue); box-shadow: 0 0 0 2px rgba(56, 139, 253, 0.2); }
.select-sm { font-size: 0.8rem; padding: 0.4rem 0.75rem; }

.search-wrapper { position: relative; }
.search-icon { position: absolute; left: 0.75rem; top: 50%; transform: translateY(-50%); color: var(--text-muted); pointer-events: none; }

.input-control {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    padding: 0.4rem 0.75rem 0.4rem 2.25rem;
    outline: none;
    width: 100%;
    transition: border-color var(--transition);
}

.input-control::placeholder { color: var(--text-muted); }
.input-control:focus { border-color: var(--accent-blue); box-shadow: 0 0 0 2px rgba(56, 139, 253, 0.2); }

/* === Buttons === */
.btn-ghost {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: all var(--transition);
}

.btn-ghost:hover { background: var(--bg-hover); color: var(--text-primary); border-color: var(--accent-blue); }

/* === Stat Badges === */
.stat-badges { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.stat-badge {
    display: flex; align-items: center; gap: 0.4rem;
    padding: 0.3rem 0.75rem; border-radius: var(--radius-xl);
    font-size: 0.75rem; font-weight: 600; letter-spacing: 0.02em;
}
.badge-aktif    { background: rgba(57, 211, 83, 0.12); color: var(--accent-teal); border: 1px solid rgba(57,211,83,0.25); }
.badge-akan     { background: rgba(56, 139, 253, 0.12); color: var(--accent-blue); border: 1px solid rgba(56,139,253,0.25); }
.badge-selesai  { background: rgba(139,148,158,0.1); color: var(--text-secondary); border: 1px solid var(--border); }
:root[data-theme="light"] .badge-selesai { background: var(--bg-elevated); }

.stat-dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.badge-aktif   .stat-dot { background: var(--accent-teal); box-shadow: 0 0 6px var(--accent-teal); animation: pulse 2s infinite; }
.badge-akan    .stat-dot { background: var(--accent-blue); }
.badge-selesai .stat-dot { background: var(--text-muted); }

/* === Cards (Hari Ini & Status Ruangan) === */
.schedule-grid, .room-status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.sesi-card, .room-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
    position: relative;
    overflow: hidden;
}

.sesi-card::before {
    content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; border-radius: 4px 0 0 4px;
}
.sesi-card.status-aktif::before    { background: var(--accent-teal); }
.sesi-card.status-akan_datang::before { background: var(--accent-blue); }
.sesi-card.status-selesai::before  { background: var(--text-muted); }

.sesi-card.status-aktif { border-color: rgba(57,211,83,0.3); background: linear-gradient(135deg, rgba(57,211,83,0.03) 0%, var(--bg-surface) 60%); }
.sesi-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--border-subtle); }
.sesi-card.status-aktif:hover { border-color: rgba(57,211,83,0.5); }

.room-card.kosong  { border-color: var(--border); }
.room-card.aktif   { border-color: rgba(57,211,83,0.35); background: rgba(57,211,83,0.04); }
.room-card.selesai { border-color: var(--border-subtle); background: rgba(139,148,158,0.03); opacity: 0.85; }
.room-card.akan-datang { border-color: rgba(56,139,253,0.35); background: rgba(56,139,253,0.04); }

.room-card.aktif:hover { transform: translateY(-3px); box-shadow: 0 4px 20px rgba(57,211,83,0.15); }
.room-card.akan-datang:hover { transform: translateY(-3px); box-shadow: 0 4px 20px rgba(56,139,253,0.15); }
.room-card.selesai:hover { border-color: var(--border); opacity: 1; }

.sesi-card-header, .room-header {
    display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.75rem;
}

.sesi-ruangan, .room-name {
    font-family: var(--font-mono); font-size: 0.85rem; font-weight: 700; color: var(--accent-blue);
}

.sesi-status-badge, .room-badge {
    font-size: 0.65rem; font-weight: 700; padding: 0.2rem 0.6rem; border-radius: var(--radius-xl); text-transform: uppercase; letter-spacing: 0.05em;
}
.status-aktif .sesi-status-badge, .room-card.aktif .room-badge { background: rgba(57,211,83,0.15); color: var(--accent-teal); }
.status-akan_datang .sesi-status-badge, .room-card.akan-datang .room-badge { background: rgba(56,139,253,0.15); color: var(--accent-blue); }
.status-selesai .sesi-status-badge, .room-card.selesai .room-badge { background: rgba(139,148,158,0.1); color: var(--text-muted); }
.room-card.kosong .room-badge { background: rgba(139,148,158,0.1); color: var(--text-muted); }

.sesi-mk, .room-mk { font-size: 0.95rem; font-weight: 600; color: var(--text-primary); margin-bottom: 0.3rem; line-height: 1.3; }
.sesi-detail, .room-info { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 0.5rem; }
.room-kosong-label { font-size: 0.85rem; color: var(--text-muted); font-style: italic; }

.sesi-meta { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.75rem; }
.meta-chip { font-size: 0.7rem; padding: 0.2rem 0.6rem; border-radius: var(--radius-xl); background: var(--bg-elevated); border: 1px solid var(--border-subtle); color: var(--text-secondary); }

.sesi-waktu { display: flex; align-items: center; gap: 0.5rem; font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-secondary); margin-top: 0.75rem; }

/* === Table === */
.jadwal-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.jadwal-table th { background: var(--bg-elevated); border: 1px solid var(--border); color: var(--text-secondary); font-size: 0.75rem; font-weight: 600; letter-spacing: 0.05em; padding: 0.75rem 1rem; text-align: left; text-transform: uppercase; white-space: nowrap; }
.jadwal-table td { border: 1px solid var(--border-subtle); color: var(--text-primary); padding: 0.75rem 1rem; vertical-align: top; transition: background var(--transition); }
.jadwal-table tr:hover td { background: var(--bg-hover); }
.td-mk { font-weight: 600; }
.td-detail { font-size: 0.75rem; color: var(--text-secondary); margin-top: 2px; }
.td-ruangan, .td-waktu { font-family: var(--font-mono); font-size: 0.8rem; white-space: nowrap; }
.td-ruangan { color: var(--accent-blue); }
.td-kelas { font-size: 0.8rem; color: var(--text-secondary); }

/* === Matrix Timeline Table === */
.matrix-wrapper { background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-md); overflow-x: auto; margin-top: 1rem; position: relative; }
.matrix-table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 0.75rem; }
.matrix-table th, .matrix-table td { border: 1px solid var(--border-subtle); padding: 0.75rem 0.5rem; min-width: 110px; text-align: center; }
.matrix-table th { background: var(--bg-elevated); position: sticky; top: 0; z-index: 10; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; }

.matrix-table td:first-child, .matrix-table th:first-child {
    position: sticky; left: 0; background: var(--bg-surface); z-index: 11; min-width: 120px;
    font-family: var(--font-mono); font-weight: 700; color: var(--accent-blue); border-right: 2px solid var(--border);
}
.matrix-table th:first-child { z-index: 12; background: var(--bg-elevated); }

.cell-occupied { background: rgba(56, 139, 253, 0.1); color: var(--text-primary); line-height: 1.3; transition: background var(--transition); }
.cell-occupied:hover { background: rgba(56, 139, 253, 0.2); }
.cell-empty { color: var(--text-muted); background: transparent; }
.matrix-mk { display: block; font-weight: 600; }
.matrix-kelas { display: block; font-size: 0.7rem; color: var(--text-secondary); margin-top: 4px; }

/* === Loading & States === */
.loading-state, .empty-grid { grid-column: 1 / -1; display: flex; flex-direction: column; align-items: center; gap: 0.75rem; padding: 4rem 1rem; color: var(--text-secondary); font-size: 0.9rem; text-align: center; }
.spinner { width: 32px; height: 32px; border: 3px solid var(--border); border-top-color: var(--accent-blue); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.empty-msg { color: var(--text-muted); text-align: center; padding: 3rem !important; font-style: italic; }
.result-count { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.75rem; text-align: right; }

/* === Footer === */
.site-footer {
    padding: 2rem;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
    background: var(--bg-surface);
}

.developer-info {
    margin-top: 0.5rem;
    color: var(--text-secondary);
}

.developer-info a {
    font-weight: 600;
}

/* === Responsive (Mobile Menu) === */
@media (max-width: 900px) {
    .top-header {
        display: flex;
    }
    
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        transform: translateX(-100%);
        box-shadow: var(--shadow-lg);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .mobile-only-btn {
        display: block;
        background: transparent;
        border: none;
        color: var(--text-primary);
        font-size: 1.25rem;
        cursor: pointer;
    }
    
    .main-content {
        padding: 1.5rem 1rem;
    }
}