/* ===== Token dasar ===== */
:root {
    --accent: #5b9dff;         /* diganti dinamis sesuai user */
    --accent-soft: #5b9dff26;

    --bg: #14161a;
    --panel: #1b1e24;
    --panel-2: #21252c;
    --border: #2b303a;
    --text-main: #e8eaef;
    --text-muted: #99a1ad;

    --zone-a: #5b9dff;
    --zone-a-bg: #1a2432;
    --zone-b: #34d399;
    --zone-b-bg: #16241f;

    --flag-color: #f59e0b;
    --flag-bg: #2a2113;

    --radius-lg: 16px;
    --radius-md: 10px;
    --font-ui: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;
}

* { box-sizing: border-box; }

body {
    font-family: var(--font-ui);
    background-color: var(--bg);
    color: var(--text-main);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    height: 100vh;
    -webkit-font-smoothing: antialiased;
}

.sr-only {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ===== Penanda identitas kurator (anti salah-tab) ===== */
.identity-strip {
    height: 6px;
    width: 100%;
    background: var(--accent);
    transition: background 0.2s ease;
    flex-shrink: 0;
}

.identity-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.identity-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 14px 7px 10px;
    border-radius: 999px;
    background: var(--accent-soft);
    border: 1.5px solid var(--accent);
}

.identity-icon {
    font-size: 16px;
    color: var(--accent);
    line-height: 1;
}

.identity-name {
    font-size: 14px;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: 0.01em;
}

/* ===== Navigasi atas ===== */
.header {
    background-color: var(--panel);
    border-bottom: 1px solid var(--border);
    padding: 14px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.header select {
    padding: 10px 14px;
    font-size: 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background-color: var(--panel-2);
    color: var(--text-main);
    cursor: pointer;
    font-weight: 600;
}

.leaderboard-container {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.newsletter-link {
    text-decoration: none;
    white-space: nowrap;
}

.stat-card {
    background-color: var(--panel-2);
    border: 1px solid var(--border);
    padding: 7px 14px;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 76px;
    transition: box-shadow 0.4s ease;
}

.stat-card.milestone {
    box-shadow: 0 0 0 2px var(--accent-soft), 0 0 16px var(--accent-soft);
}

.stat-card .stat-name {
    font-size: 10px;
    letter-spacing: 0.02em;
    font-weight: 600;
    color: var(--text-muted);
}

.stat-card .stat-score {
    font-family: var(--font-mono);
    font-size: 17px;
    font-weight: 600;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
}

/* ===== Area kerja ===== */
.workspace {
    display: none;
    flex: 1;
    flex-direction: row;
    overflow: hidden;
    position: relative;
}

.main-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px 30px 30px;
    min-width: 0;
    overflow-y: auto;
}

/* Baris progres + rentetan */
.session-bar {
    width: 100%;
    max-width: 760px;
    margin-bottom: 18px;
}

.progress-track {
    width: 100%;
    height: 6px;
    background: var(--panel-2);
    border-radius: 999px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: var(--accent);
    border-radius: 999px;
    transition: width 0.5s ease;
}

.session-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 10px;
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 500;
}

.streak-pill {
    background: var(--panel-2);
    border: 1px solid var(--border);
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-main);
}

/* Panggung gambar */
.stage {
    position: relative;
    width: 100%;
    max-width: 760px;
    margin-bottom: 22px;
}

.milestone-toast {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translate(-50%, -8px);
    background: var(--panel-2);
    border: 1px solid var(--accent);
    color: var(--text-main);
    padding: 6px 16px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    z-index: 5;
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}

.milestone-toast.show {
    opacity: 1;
    transform: translate(-50%, 0);
}

.image-container {
    width: 100%;
    height: 52vh;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: var(--panel);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

/* Tombol tandai gambar bermasalah: pojok kanan-atas, jauh dari zona
   label di bawah, dan sengaja dibuat pudar sampai di-hover supaya
   tidak menarik perhatian saat kerja normal. */
.flag-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: rgba(20,22,26,0.55);
    color: var(--text-main);
    font-size: 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.45;
    transition: opacity 0.15s ease, transform 0.15s ease, background 0.15s ease;
    z-index: 3;
}

.flag-btn:hover, .flag-btn:focus-visible {
    opacity: 1;
    background: rgba(20,22,26,0.85);
    transform: scale(1.06);
}

.flag-btn:disabled {
    opacity: 0.2;
    cursor: not-allowed;
}

.image-container img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transition: opacity 0.18s ease, transform 0.18s ease;
}

.image-container img.leaving-left  { opacity: 0; transform: translateX(-24px); }
.image-container img.leaving-right { opacity: 0; transform: translateX(24px); }
.image-container img.entering      { opacity: 0; transform: translateY(6px); }

/* Panel skor: slider kontinu 0-1 menggantikan tombol Kelas A/B + kerumitan */
.score-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    width: 100%;
    max-width: 760px;
}

.score-readout {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.score-value {
    font-family: var(--font-mono);
    font-size: 40px;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    font-variant-numeric: tabular-nums;
    transition: color 0.1s ease;
}

.score-hint {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}

.score-slider-row {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
}

.score-endpoint {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-muted);
    flex-shrink: 0;
}

/* Slider custom: track diisi gradient statis biru->hijau, lalu lapisan
   "--fill" (diupdate dari JS) menunjukkan posisi nilai saat ini secara
   lebih terang, supaya progres kelihatan tanpa harus baca angka. */
.score-slider {
    -webkit-appearance: none;
    appearance: none;
    flex: 1;
    height: 10px;
    border-radius: 999px;
    background: linear-gradient(to right,
        var(--zone-b) 0%,
        var(--zone-b) var(--fill, 50%),
        var(--border) var(--fill, 50%),
        var(--border) 100%);
    cursor: pointer;
    outline: none;
}

.score-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--text-main);
    border: 3px solid var(--accent);
    cursor: grab;
    transition: transform 0.1s ease;
}
.score-slider::-webkit-slider-thumb:hover,
.score-slider:focus-visible::-webkit-slider-thumb {
    transform: scale(1.12);
}
.score-slider::-webkit-slider-thumb:active { cursor: grabbing; }

.score-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--text-main);
    border: 3px solid var(--accent);
    cursor: grab;
}
.score-slider::-moz-range-track {
    height: 10px;
    border-radius: 999px;
    background: linear-gradient(to right,
        var(--zone-b) 0%,
        var(--zone-b) var(--fill, 50%),
        var(--border) var(--fill, 50%),
        var(--border) 100%);
}

.score-presets {
    display: flex;
    gap: 8px;
}

.score-preset {
    padding: 7px 14px;
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 999px;
    cursor: pointer;
    transition: background 0.12s ease, color 0.12s ease, border-color 0.12s ease, transform 0.1s ease;
}
.score-preset:hover, .score-preset:focus-visible {
    color: var(--text-main);
    border-color: var(--accent);
}
.score-preset:active { transform: scale(0.95); }

.btn {
    border: none;
    cursor: pointer;
    color: var(--text-main);
    font-family: inherit;
    transition: transform 0.12s ease, box-shadow 0.12s ease, filter 0.12s ease;
}

.btn-submit-score {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 13px 32px;
    font-size: 16px;
    font-weight: 700;
    color: #0c0d0f;
    background: var(--accent);
    border-radius: var(--radius-md);
    box-shadow: 0 0 0 0 var(--accent-soft);
}
.btn-submit-score:hover, .btn-submit-score:focus-visible {
    transform: translateY(-1px);
    box-shadow: 0 4px 18px var(--accent-soft);
}
.btn-submit-score:active { transform: translateY(0) scale(0.98); }
.btn-submit-score .btn-hint-inline {
    color: #0c0d0f;
    border-color: rgba(12,13,15,0.35);
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.btn-hint-inline {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-muted);
    border: 1px solid var(--border);
    padding: 1px 6px;
    border-radius: 5px;
}

/* Baris utilitas: undo */
.utility-row {
    margin-top: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-utility {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--panel-2);
    color: var(--text-main);
    cursor: pointer;
    transition: background 0.15s ease, opacity 0.15s ease;
}

.btn-utility .icon { font-size: 14px; }

.btn-utility:hover:not(:disabled) { background: var(--border); }
.btn-utility:disabled { opacity: 0.35; cursor: not-allowed; }

.undo-target {
    font-size: 12px;
    color: var(--text-muted);
}

/* ===== Tab panah pembuka riwayat (kanan-tengah) ===== */
.history-tab {
    position: fixed;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    z-index: 30;
    width: 30px;
    height: 64px;
    border: 1px solid var(--border);
    border-right: none;
    background: var(--panel-2);
    color: var(--text-main);
    border-radius: 10px 0 0 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: right 0.28s ease, background 0.15s ease;
}

.history-tab:hover { background: var(--border); }

.history-tab-arrow {
    font-size: 20px;
    line-height: 1;
    transition: transform 0.28s ease;
}

.history-tab.open { right: 320px; }
.history-tab.open .history-tab-arrow { transform: rotate(180deg); }

/* ===== Drawer galeri riwayat ===== */
.history-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.35);
    z-index: 20;
}

.history-drawer {
    position: fixed;
    top: 0;
    right: 0;
    height: 100%;
    width: 320px;
    max-width: 88vw;
    background: var(--panel);
    border-left: 1px solid var(--border);
    z-index: 25;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: translateX(100%);
    transition: transform 0.28s ease;
}

.history-drawer.open { transform: translateX(0); }

.history-drawer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 12px 12px 16px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
    font-weight: 700;
}

.history-tabs {
    display: flex;
    gap: 6px;
}

.history-tab-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-muted);
    background: transparent;
    border: 1px solid transparent;
    border-radius: 999px;
    cursor: pointer;
    font-family: inherit;
}

.history-tab-btn:hover { color: var(--text-main); }

.history-tab-btn.active {
    color: var(--text-main);
    background: var(--panel-2);
    border-color: var(--border);
}

.tab-count {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    background: var(--flag-color);
    color: #1a1300;
    border-radius: 999px;
    padding: 1px 6px;
    min-width: 16px;
    text-align: center;
}

.history-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 16px;
    cursor: pointer;
    padding: 4px;
}
.history-close:hover { color: var(--text-main); }

.history-gallery {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: 14px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    align-content: start;
}

.history-gallery[hidden] { display: none; }

/* PENTING: [hidden] harus menang atas "display: grid" di atas — tanpa ini,
   galeri Riwayat & Ditandai akan tampil bertumpuk bersamaan walau salah
   satunya sudah diberi atribut hidden lewat JS. */
.history-gallery[hidden] {
    display: none !important;
}

.thumb-card {
    position: relative;
    aspect-ratio: 1 / 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    background: var(--panel-2);
    border: 3px solid var(--border);
    padding: 0;
    transition: transform 0.12s ease, border-color 0.12s ease;
}

.thumb-card:hover, .thumb-card:focus-visible {
    transform: scale(1.03);
}

/* Skor ditandai lewat warna border (gradient biru->hijau sesuai posisi 0-1),
   diset inline lewat --score-color dari JS karena nilainya kontinu. */
.thumb-card.scored { border-color: var(--score-color, var(--border)); }
.thumb-card.flagged { border-color: var(--flag-color); background: var(--flag-bg); }

.score-badge {
    position: absolute;
    bottom: 4px;
    left: 4px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    background: rgba(20,22,26,0.75);
    color: var(--text-main);
    border-radius: 6px;
    padding: 2px 6px;
    z-index: 2;
}

.thumb-flag-meta {
    position: absolute;
    left: 0; right: 0; bottom: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.75), transparent);
    color: #fff;
    font-size: 10px;
    padding: 12px 6px 5px;
    text-align: center;
    pointer-events: none;
}

.thumb-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.thumb-delete {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: none;
    background: rgba(20,22,26,0.75);
    color: #fff;
    font-size: 12px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}
.thumb-delete:hover { background: #7f2f2f; }

.history-empty {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
    padding: 24px 8px;
}

/* ===== Responsif ===== */
@media (max-width: 880px) {
    .workspace { overflow-y: auto; }
    .main-panel { padding: 18px; }
    .image-container { height: 40vh; }
    .score-value { font-size: 32px; }
    .score-presets { flex-wrap: wrap; justify-content: center; }

    .history-drawer { width: 86vw; }
    .history-tab.open { right: 86vw; }
    .history-gallery { grid-template-columns: 1fr 1fr 1fr; }
}

.image-container { position: relative; }

.img-loader {
    position: absolute; inset: 0; z-index: 2;
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
    border-radius: inherit; pointer-events: none;
    color: #9aa4b2; font-size: 13px;
    background: linear-gradient(100deg, rgba(255,255,255,.02) 30%, rgba(255,255,255,.08) 50%, rgba(255,255,255,.02) 70%);
    background-size: 200% 100%;
    animation: img-shimmer 1.4s linear infinite;
}
.img-loader[hidden] { display: none; }
.img-loader .spinner {
    width: 38px; height: 38px; border-radius: 50%;
    border: 3px solid var(--accent-soft, #5b9dff26);
    border-top-color: var(--accent, #5b9dff);
    animation: img-spin .8s linear infinite;
}
.img-loader.failed .spinner { display: none; }
.img-loader.failed { color: #f87171; animation: none; }
#current-image.is-loading { opacity: 0 !important; }

@keyframes img-spin { to { transform: rotate(360deg); } }
@keyframes img-shimmer { to { background-position: -200% 0; } }
@media (prefers-reduced-motion: reduce) {
    .img-loader, .img-loader .spinner { animation-duration: 3s; }
}