/* ============================================================
   Kagu Web Online Judge Styles (Dhaka Night Theme)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Hind+Siliguri:wght@400;500;600;700&display=swap');

:root {
    --font-bangla: 'Hind Siliguri', 'Anek Bangla', system-ui, -apple-system, sans-serif;
    
    /* Verdict Colors */
    --verdict-ac-bg: rgba(155, 221, 116, 0.14);
    --verdict-ac-color: #9BDD74;
    --verdict-ac-border: rgba(155, 221, 116, 0.35);

    --verdict-wa-bg: rgba(255, 122, 115, 0.14);
    --verdict-wa-color: #FF7A73;
    --verdict-wa-border: rgba(255, 122, 115, 0.35);

    --verdict-pe-bg: rgba(255, 168, 94, 0.14);
    --verdict-pe-color: #FFA85E;
    --verdict-pe-border: rgba(255, 168, 94, 0.35);

    --verdict-tle-bg: rgba(201, 162, 255, 0.14);
    --verdict-tle-color: #C9A2FF;
    --verdict-tle-border: rgba(201, 162, 255, 0.35);

    --verdict-ce-bg: rgba(170, 184, 174, 0.14);
    --verdict-ce-color: #A9B8AE;
    --verdict-ce-border: rgba(170, 184, 174, 0.35);
}

/* Typography & Bangla Text */
.bangla-text {
    font-family: var(--font-bangla);
    line-height: 1.7;
    letter-spacing: 0.01em;
}

/* Verdict Badges */
.badge-verdict {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    font-size: 0.8rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    white-space: nowrap;
    text-transform: capitalize;
}

.badge-verdict.badge-ac {
    background: var(--verdict-ac-bg);
    color: var(--verdict-ac-color);
    border: 1px solid var(--verdict-ac-border);
}

.badge-verdict.badge-wa {
    background: var(--verdict-wa-bg);
    color: var(--verdict-wa-color);
    border: 1px solid var(--verdict-wa-border);
}

.badge-verdict.badge-pe {
    background: var(--verdict-pe-bg);
    color: var(--verdict-pe-color);
    border: 1px solid var(--verdict-pe-border);
}

.badge-verdict.badge-tle {
    background: var(--verdict-tle-bg);
    color: var(--verdict-tle-color);
    border: 1px solid var(--verdict-tle-border);
}

.badge-verdict.badge-ce,
.badge-verdict.badge-re {
    background: var(--verdict-ce-bg);
    color: var(--verdict-ce-color);
    border: 1px solid var(--verdict-ce-border);
}

.badge-verdict.badge-pending {
    background: rgba(245, 183, 49, 0.12);
    color: #F5B731;
    border: 1px solid rgba(245, 183, 49, 0.3);
}

/* Level badge */
.badge-level {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    font-size: 0.72rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    background: rgba(114, 198, 242, 0.12);
    color: #72C6F2;
    border: 1px solid rgba(114, 198, 242, 0.28);
}

/* Header Problem Selector */
.problem-dropdown {
    background: var(--bg-surface-raised);
    border: 1px solid rgba(245, 183, 49, 0.4);
    color: #F5B731;
    font-family: var(--font-ui);
    font-size: 0.84rem;
    font-weight: 700;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    outline: none;
    max-width: 220px;
}
.problem-dropdown:focus {
    border-color: #F5B731;
    box-shadow: 0 0 0 1px #F5B731;
}

/* Header toolbar links */
a.toolbar-link {
    text-decoration: none;
    font-size: 0.82rem;
    padding: 6px 12px;
}

/* ============================================================
   Problems List Page (problems.html)
   ============================================================ */
.problems-container {
    max-width: 1040px;
    margin: 0 auto;
    padding: 32px 20px 60px;
    width: 100%;
}

.problems-hero {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 28px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-subtle);
}

.problems-hero-text h2 {
    font-size: 1.85rem;
    color: var(--text-main);
    margin-bottom: 6px;
    font-weight: 700;
}

.problems-hero-text p {
    color: var(--text-muted);
    font-size: 0.98rem;
    max-width: 620px;
}

.problems-stats {
    display: flex;
    align-items: center;
    gap: 12px;
}

.stat-pill {
    background: var(--bg-surface-raised);
    border: 1px solid var(--border-subtle);
    padding: 8px 16px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 10px;
}

.stat-pill-num {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.15rem;
    color: #F5B731;
}

.stat-pill-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.problems-table-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.problems-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.problems-table th {
    background: var(--bg-surface-raised);
    padding: 14px 18px;
    color: var(--text-faint);
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-bottom: 1px solid var(--border-subtle);
}

.problems-table td {
    padding: 16px 18px;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-main);
    font-size: 0.95rem;
    vertical-align: middle;
}

.problems-table tr:last-child td {
    border-bottom: none;
}

.problems-table tr.problem-row {
    transition: background 0.15s ease;
    cursor: pointer;
}

.problems-table tr.problem-row:hover {
    background: var(--bg-surface-hover);
}

.col-status {
    width: 60px;
    text-align: center;
}

.status-check {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--verdict-ac-bg);
    color: var(--verdict-ac-color);
    border: 1px solid var(--verdict-ac-border);
    font-size: 0.84rem;
    font-weight: 700;
}

.status-unsolved {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-subtle);
}

.col-id {
    width: 85px;
    font-family: var(--font-mono);
    font-weight: 700;
    color: #F5B731;
}

.col-title {
    font-weight: 600;
    font-size: 1.05rem;
}

.col-level {
    width: 120px;
}

.col-action {
    width: 120px;
    text-align: right;
}

.btn-solve {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: rgba(245, 183, 49, 0.1);
    border: 1px solid rgba(245, 183, 49, 0.35);
    color: #F5B731;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all 0.18s ease;
}

.problem-row:hover .btn-solve {
    background: #F5B731;
    color: #1B1403;
    border-color: #E0A21C;
}

/* ============================================================
   Problem Page (problem.html) Layout
   ============================================================ */

/* Left panel: Statement */
#panel-statement {
    flex: 1;
    min-width: 320px;
}

.statement-body {
    flex: 1;
    overflow-y: auto;
    padding: 22px 24px 44px;
    min-height: 0;
}

.problem-header-block {
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-subtle);
}

.problem-title-bn {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.problem-meta-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.meta-chip {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    background: var(--bg-surface-raised);
    border: 1px solid var(--border-subtle);
    color: var(--text-muted);
}

.statement-section {
    margin-bottom: 22px;
}

.statement-section h3 {
    font-size: 1rem;
    font-weight: 700;
    color: #F5B731;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.statement-section p,
.statement-section .statement-content {
    font-size: 0.95rem;
    color: var(--text-main);
    line-height: 1.75;
}

.statement-note {
    background: rgba(114, 198, 242, 0.08);
    border-left: 3px solid #72C6F2;
    padding: 12px 16px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-top: 14px;
    font-size: 0.92rem;
    color: #A9B8AE;
}

.important-warning-card {
    background: rgba(245, 183, 49, 0.08);
    border: 1px solid rgba(245, 183, 49, 0.3);
    border-left: 4px solid #F5B731;
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    margin-top: 26px;
    font-size: 0.92rem;
    color: #EEF2E6;
    line-height: 1.6;
}

/* Sample Cases */
.sample-case-card {
    margin-top: 12px;
    margin-bottom: 14px;
    background: var(--bg-surface-raised);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.sample-case-header {
    background: rgba(0, 0, 0, 0.25);
    padding: 8px 14px;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sample-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.sample-box {
    padding: 10px 14px;
    border-right: 1px solid var(--border-subtle);
}

.sample-box:last-child {
    border-right: none;
}

.sample-box-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--text-faint);
    margin-bottom: 5px;
}

.sample-code {
    font-family: var(--font-mono);
    font-size: 0.86rem;
    white-space: pre-wrap;
    color: #EEF2E6;
    user-select: all;
    background: var(--bg-editor);
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    min-height: 40px;
}

.btn-sample-copy {
    background: transparent;
    border: 1px solid var(--border-subtle);
    color: var(--text-faint);
    border-radius: var(--radius-sm);
    padding: 2px 8px;
    font-size: 0.72rem;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-sample-copy:hover {
    color: var(--text-main);
    border-color: var(--border-medium);
}

/* ============================================================
   Right Panel: Editor (Top) + Results (Bottom)
   ============================================================ */
#panel-right {
    flex: 1.25;
    min-width: 380px;
    display: flex;
    flex-direction: column;
}

#editor-subpanel {
    flex: 1.35;
    display: flex;
    flex-direction: column;
    min-height: 220px;
    border-bottom: 1px solid var(--border-subtle);
    position: relative;
    overflow: hidden;
}

#results-subpanel {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 180px;
    overflow: hidden;
    background: var(--bg-surface);
}

.judge-results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    background: var(--bg-surface-raised);
    border-bottom: 1px solid var(--border-subtle);
    flex-shrink: 0;
}

.results-title {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 8px;
}

.results-content {
    flex: 1;
    overflow-y: auto;
    padding: 14px 16px;
    min-height: 0;
}

.results-empty-state {
    color: var(--text-faint);
    text-align: center;
    padding: 30px 16px;
    font-size: 0.88rem;
}

.results-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 14px;
    background: var(--bg-surface-raised);
    border: 1px solid var(--border-subtle);
}

.results-banner.is-ac {
    background: var(--verdict-ac-bg);
    border-color: var(--verdict-ac-border);
}

.results-banner.is-wa {
    background: var(--verdict-wa-bg);
    border-color: var(--verdict-wa-border);
}

.results-banner.is-pe {
    background: var(--verdict-pe-bg);
    border-color: var(--verdict-pe-border);
}

.results-banner.is-tle {
    background: var(--verdict-tle-bg);
    border-color: var(--verdict-tle-border);
}

.results-banner.is-ce,
.results-banner.is-re {
    background: var(--verdict-ce-bg);
    border-color: var(--verdict-ce-border);
}

.results-banner-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.results-banner-title {
    font-size: 1.05rem;
    font-weight: 800;
}

.results-banner-meta {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Test Rows Table */
.tests-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 6px;
    font-size: 0.86rem;
}

.tests-table th {
    padding: 8px 12px;
    font-size: 0.72rem;
    text-transform: uppercase;
    color: var(--text-faint);
    border-bottom: 1px solid var(--border-subtle);
    background: var(--bg-surface-raised);
    text-align: left;
}

.tests-table td {
    padding: 9px 12px;
    border-bottom: 1px solid var(--border-subtle);
    vertical-align: middle;
}

.tests-table tr.test-row-failed {
    background: rgba(255, 122, 115, 0.05);
}

/* Sample Diff / Comparison Box */
.sample-diff-container {
    margin-top: 8px;
    padding: 12px;
    background: var(--bg-base);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
}

.diff-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
}

.diff-col h5 {
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--text-faint);
    margin-bottom: 5px;
    font-weight: 700;
}

.diff-box {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    background: var(--bg-editor);
    padding: 7px 9px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    white-space: pre-wrap;
    min-height: 44px;
    color: var(--text-main);
    word-break: break-all;
}

.diff-box.is-actual {
    border-color: rgba(255, 122, 115, 0.5);
    background: rgba(255, 122, 115, 0.06);
}

.diff-box.is-expected {
    border-color: rgba(155, 221, 116, 0.5);
    background: rgba(155, 221, 116, 0.06);
}

/* Compilation Error Box */
.ce-error-card {
    background: rgba(255, 122, 115, 0.08);
    border: 1px solid rgba(255, 122, 115, 0.3);
    border-left: 4px solid #FF7A73;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    margin-top: 10px;
}

.ce-error-title {
    color: #FF7A73;
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.ce-error-msg {
    font-family: var(--font-mono);
    font-size: 0.84rem;
    color: #EEF2E6;
}

/* Spinner */
.judge-spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid rgba(245, 183, 49, 0.25);
    border-top-color: #F5B731;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

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

/* ============================================================
   Mobile View (<= 768px)
   ============================================================ */
@media (max-width: 768px) {
    header {
        height: auto;
        padding: 6px 10px;
        flex-wrap: wrap;
        gap: 6px;
    }

    .brand {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    .controls {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 6px;
    }

    .controls button,
    .controls a {
        flex: 1;
        min-width: 0;
        height: 36px;
        padding: 0 8px;
        font-size: 0.78rem;
        gap: 4px;
        justify-content: center;
    }

    .mobile-nav-segmented {
        display: flex;
        margin: 6px 10px;
    }

    main {
        flex-direction: column;
        padding: 0 10px 8px 10px;
        gap: 0;
        height: calc(100vh - 120px);
    }

    .panel-divider {
        display: none !important;
    }

    /* Tab switching on mobile */
    #panel-statement,
    #panel-right {
        display: none;
        height: 100%;
        width: 100%;
    }

    #panel-statement.mobile-active {
        display: flex;
    }

    #panel-right.mobile-active {
        display: flex;
    }

    /* Subpanels on mobile */
    #panel-right.show-editor #editor-subpanel {
        display: flex;
        flex: 1;
        height: 100%;
        border-bottom: none;
    }

    #panel-right.show-editor #results-subpanel {
        display: none;
    }

    #panel-right.show-results #editor-subpanel {
        display: none;
    }

    #panel-right.show-results #results-subpanel {
        display: flex;
        flex: 1;
        height: 100%;
    }

    .sample-grid {
        grid-template-columns: 1fr;
    }

    .sample-box {
        border-right: none;
        border-bottom: 1px solid var(--border-subtle);
    }

    .sample-box:last-child {
        border-bottom: none;
    }

    .diff-grid {
        grid-template-columns: 1fr;
    }

    .problems-hero {
        flex-direction: column;
    }

    .problems-table th:nth-child(4),
    .problems-table td:nth-child(4) {
        display: none;
    }
}

@media (max-width: 420px) {
    .controls button > span,
    .controls a > span {
        display: none;
    }

    .controls button,
    .controls a {
        min-width: 36px;
        padding: 0;
    }
}

/* Problem Switcher Dropdown in Judge Header */
.problem-switcher-select {
    background: var(--bg-surface-raised);
    color: #F5B731;
    border: 1px solid rgba(245, 183, 49, 0.35);
    border-radius: var(--radius-sm);
    padding: 4px 8px;
    font-family: var(--font-ui);
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
    max-width: 190px;
    height: 32px;
    outline: none;
    transition: all 0.2s ease;
}

.problem-switcher-select:hover,
.problem-switcher-select:focus-visible {
    border-color: #F5B731;
    background: rgba(245, 183, 49, 0.08);
}

.problem-switcher-select option {
    background: #18231e;
    color: var(--text-main);
    font-family: var(--font-ui);
    padding: 6px;
}

@media (max-width: 600px) {
    .problem-switcher-select {
        max-width: 130px;
        font-size: 0.76rem;
        padding: 2px 4px;
    }
}