:root {
    --bg-page: #f8fafc;
    --bg-card: #ffffff;
    --border-color: #e2e8f0;
    --border-focus: #2563eb;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-sub: #475569;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --success: #16a34a;
    --success-light: #f0fdf4;
    --danger: #dc2626;
    --danger-light: #fef2f2;
    --warning: #d97706;
    --warning-light: #fffbeb;
    --radius-sharp: 4px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

                                                        
body.dark-mode {
    --bg-page: #0b0f19;
    --bg-card: #111827;
    --border-color: #1f2937;
    --border-focus: #3b82f6;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-sub: #cbd5e1;
    --primary-light: rgba(37, 99, 235, 0.15);
    --success-light: rgba(22, 163, 74, 0.15);
    --danger-light: rgba(220, 38, 38, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    -webkit-tap-highlight-color: transparent;
}

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

.reading-app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

                                                            
                                              
                                                               
.reading-top-bar {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    height: 60px;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    box-shadow: var(--shadow-sm);
}

.bar-left {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}

.nav-back-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 14px;
    background-color: #f1f5f9;
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-sharp);
    border: 1px solid #cbd5e1;
    transition: all 0.15s ease;
}

body.dark-mode .nav-back-pill {
    background-color: #1e293b;
    color: #f8fafc;
    border-color: #334155;
}

.nav-back-pill:hover {
    background-color: #e2e8f0;
    color: var(--primary);
}

body.dark-mode .nav-back-pill:hover {
    background-color: #334155;
    color: #60a5fa;
}

.brand-divider {
    width: 1px;
    height: 20px;
    background-color: var(--border-color);
}

.test-identity {
    display: flex;
    align-items: center;
}

.exam-tag {
    font-size: 0.84rem;
    font-weight: 800;
    color: var(--primary);
    background-color: var(--primary-light);
    padding: 4px 10px;
    border-radius: var(--radius-sharp);
    border: 1px solid rgba(37, 99, 235, 0.2);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

                                   
.bar-center {
    flex: 1;
    max-width: 440px;
    display: flex;
    justify-content: center;
}

.test-switcher-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    background-color: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sharp);
    padding: 6px 12px;
    transition: all 0.15s ease;
}

body.dark-mode .test-switcher-wrap {
    background-color: #1e293b;
    border-color: #334155;
}

.test-switcher-wrap:hover,
.test-switcher-wrap:focus-within {
    border-color: var(--border-focus);
    background-color: #ffffff;
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.1);
}

body.dark-mode .test-switcher-wrap:hover,
body.dark-mode .test-switcher-wrap:focus-within {
    background-color: #1e293b;
}

.switcher-icon {
    color: var(--primary);
    font-size: 0.84rem;
    flex-shrink: 0;
}

.test-select-dropdown {
    width: 100%;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-main);
    font-size: 0.86rem;
    font-weight: 600;
    cursor: pointer;
}

.test-select-dropdown option {
    background: var(--bg-card);
    color: var(--text-main);
    padding: 6px;
}

                        
.bar-right {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.hud-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: var(--radius-sharp);
    font-size: 0.82rem;
    font-weight: 700;
    border: 1px solid var(--border-color);
    background-color: #f8fafc;
    color: var(--text-sub);
}

body.dark-mode .hud-pill {
    background-color: #1e293b;
    border-color: #334155;
    color: #cbd5e1;
}

.timer-pill {
    color: var(--primary);
    background-color: var(--primary-light);
    border-color: rgba(37, 99, 235, 0.2);
}

.timer-pill.warning {
    color: var(--danger);
    background-color: var(--danger-light);
    border-color: rgba(220, 38, 38, 0.3);
    animation: pulseWarning 1s infinite alternate;
}

@keyframes pulseWarning {
    from { opacity: 1; }
    to { opacity: 0.6; }
}

.hud-icon-btn {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sharp);
    color: var(--text-muted);
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.15s ease;
}

body.dark-mode .hud-icon-btn {
    background: #1e293b;
    border-color: #334155;
    color: #cbd5e1;
}

.hud-icon-btn:hover {
    color: var(--primary);
    border-color: var(--border-focus);
}

                                                            
                                   
                                                               
.reading-container {
    flex: 1;
    max-width: 920px;
    width: 100%;
    margin: 0 auto;
    padding: 24px 20px 80px 20px;
}

.reading-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sharp);
    padding: 28px 32px;
    box-shadow: var(--shadow-sm);
}

.reading-card-header {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.header-tags {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.badge-level {
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--primary);
    background-color: var(--primary-light);
    padding: 3px 8px;
    border-radius: var(--radius-sharp);
    border: 1px solid rgba(37, 99, 235, 0.2);
}

.badge-type {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    background-color: #f1f5f9;
    padding: 3px 8px;
    border-radius: var(--radius-sharp);
    border: 1px solid #e2e8f0;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

body.dark-mode .badge-type {
    background-color: #1e293b;
    border-color: #334155;
    color: #94a3b8;
}

.badge-time {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    background-color: #f8fafc;
    padding: 3px 8px;
    border-radius: var(--radius-sharp);
    border: 1px solid var(--border-color);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

body.dark-mode .badge-time {
    background-color: #1e293b;
    border-color: #334155;
}

.passage-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1.35;
    margin-bottom: 14px;
}

.instruction-banner {
    background-color: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: var(--radius-sharp);
    padding: 12px 16px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

body.dark-mode .instruction-banner {
    background-color: rgba(37, 99, 235, 0.1);
    border-color: rgba(37, 99, 235, 0.25);
}

.inst-icon {
    color: var(--primary);
    font-size: 1.1rem;
    margin-top: 2px;
    flex-shrink: 0;
}

.inst-text {
    font-size: 0.88rem;
    line-height: 1.5;
    color: #1e3a8a;
}

body.dark-mode .inst-text {
    color: #bfdbfe;
}

                                                            
                                          
                                                               
.passage-body {
    font-size: 1.05rem;
    line-height: 2.1;
    color: var(--text-main);
    padding: 8px 0 24px 0;
}

.passage-body p {
    margin-bottom: 20px;
    text-align: justify;
}

.passage-body p:last-child {
    margin-bottom: 0;
}

                      
.gap-slot {
    display: inline-flex;
    align-items: center;
    vertical-align: baseline;
    gap: 4px;
    margin: 0 4px;
    padding: 2px 6px;
    background-color: #f8fafc;
    border: 1px solid #cbd5e1;
    border-radius: var(--radius-sharp);
    transition: all 0.15s ease;
    box-shadow: var(--shadow-sm);
}

body.dark-mode .gap-slot {
    background-color: #1e293b;
    border-color: #475569;
}

.gap-slot:hover {
    border-color: #94a3b8;
}

.gap-slot:focus-within {
    border-color: var(--border-focus);
    background-color: #ffffff;
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}

body.dark-mode .gap-slot:focus-within {
    background-color: #0f172a;
    border-color: #3b82f6;
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}

.gap-slot.filled {
    border-color: #93c5fd;
    background-color: #eff6ff;
}

body.dark-mode .gap-slot.filled {
    background-color: rgba(37, 99, 235, 0.15);
    border-color: #3b82f6;
}

.gap-slot.correct {
    border-color: var(--success) !important;
    background-color: var(--success-light) !important;
}

.gap-slot.wrong {
    border-color: var(--danger) !important;
    background-color: var(--danger-light) !important;
}

.gap-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 22px;
    height: 20px;
    padding: 0 4px;
    background-color: #0f172a;
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 800;
    border-radius: 2px;
    flex-shrink: 0;
    user-select: none;
}

body.dark-mode .gap-number {
    background-color: #334155;
    color: #f8fafc;
}

.gap-field {
    width: 105px;
    background: transparent;
    border: none;
    outline: none;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-main);
    padding: 2px 4px;
}

.gap-field::placeholder {
    color: #94a3b8;
    font-weight: 400;
}

.gap-field:disabled {
    cursor: default;
}

                   
.passage-loading-state {
    padding: 48px 20px;
    text-align: center;
    color: var(--text-muted);
}

.passage-loading-state i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 12px;
}

                                                            
                                        
                                                               
.reading-actions {
    position: sticky;
    bottom: 0;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sharp);
    padding: 14px 20px;
    margin-top: 24px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
    box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.04);
    z-index: 50;
}

.btn-reset {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 18px;
    background-color: var(--bg-card);
    border: 1px solid #cbd5e1;
    color: var(--text-main);
    font-size: 0.88rem;
    font-weight: 700;
    border-radius: var(--radius-sharp);
    cursor: pointer;
    transition: all 0.15s ease;
}

body.dark-mode .btn-reset {
    background-color: #1e293b;
    border-color: #334155;
    color: #f8fafc;
}

.btn-reset:hover {
    background-color: #f1f5f9;
    border-color: #94a3b8;
}

body.dark-mode .btn-reset:hover {
    background-color: #334155;
}

.btn-send {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 24px;
    background-color: var(--primary);
    border: 1px solid var(--primary);
    color: #ffffff;
    font-size: 0.88rem;
    font-weight: 700;
    border-radius: var(--radius-sharp);
    cursor: pointer;
    transition: all 0.15s ease;
    box-shadow: var(--shadow-sm);
}

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

.btn-send:disabled,
.btn-reset:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

                                                            
                                        
                                                               
.result-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 20px;
}

.result-modal-overlay.open {
    display: flex;
}

.result-modal-dialog {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sharp);
    max-width: 680px;
    width: 100%;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    animation: modalPop 0.2s ease-out;
}

@keyframes modalPop {
    from { opacity: 0; transform: scale(0.96); }
    to { opacity: 1; transform: scale(1); }
}

.modal-top {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-badge-done {
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--primary);
    background-color: var(--primary-light);
    padding: 3px 10px;
    border-radius: var(--radius-sharp);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-modal-close {
    background: transparent;
    border: none;
    font-size: 1.4rem;
    color: var(--text-muted);
    cursor: pointer;
    line-height: 1;
}

.btn-modal-close:hover {
    color: var(--text-main);
}

.modal-hero {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    background-color: #f8fafc;
    border-bottom: 1px solid var(--border-color);
}

body.dark-mode .modal-hero {
    background-color: #1e293b;
}

.hero-score-disc {
    width: 90px;
    height: 90px;
    background-color: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.score-num {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--primary);
    line-height: 1;
}

.score-denom {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-muted);
}

.score-pct-label {
    font-size: 0.72rem;
    font-weight: 800;
    color: var(--success);
    margin-top: 2px;
}

.hero-verdict {
    flex: 1;
}

.cefr-badge-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
}

.cefr-badge {
    padding: 4px 10px;
    background-color: var(--primary);
    color: #ffffff;
    font-size: 0.85rem;
    font-weight: 900;
    border-radius: var(--radius-sharp);
}

.cefr-title {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--text-main);
}

.cefr-comment {
    font-size: 0.86rem;
    color: var(--text-sub);
    line-height: 1.45;
    margin-bottom: 8px;
}

.sync-indicator {
    font-size: 0.76rem;
    font-weight: 600;
    color: var(--success);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

                         
.modal-breakdown-box {
    padding: 20px 24px;
    overflow-y: auto;
    flex: 1;
}

.breakdown-title {
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.breakdown-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.breakdown-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 14px;
    background-color: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sharp);
    font-size: 0.86rem;
}

body.dark-mode .breakdown-item {
    background-color: #1e293b;
    border-color: #334155;
}

.breakdown-item.correct {
    border-left: 3px solid var(--success);
}

.breakdown-item.wrong {
    border-left: 3px solid var(--danger);
}

.breakdown-idx {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    background-color: #0f172a;
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 800;
    border-radius: 2px;
    flex-shrink: 0;
}

body.dark-mode .breakdown-idx {
    background-color: #334155;
}

.breakdown-content {
    flex: 1;
}

.breakdown-content strong {
    color: var(--text-main);
}

                   
.modal-actions {
    padding: 14px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    background-color: #f8fafc;
}

body.dark-mode .modal-actions {
    background-color: #1e293b;
    border-color: #334155;
}

.btn-modal-retry,
.btn-modal-next,
.btn-modal-stats {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 0.84rem;
    font-weight: 700;
    border-radius: var(--radius-sharp);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-modal-retry {
    background-color: var(--bg-card);
    color: var(--text-main);
    border: 1px solid #cbd5e1;
}

body.dark-mode .btn-modal-retry {
    background-color: #1e293b;
    border-color: #475569;
    color: #f8fafc;
}

.btn-modal-next {
    background-color: var(--bg-card);
    color: var(--primary);
    border: 1px solid var(--border-color);
}

body.dark-mode .btn-modal-next {
    background-color: #1e293b;
    border-color: #475569;
    color: #60a5fa;
}

.btn-modal-stats {
    background-color: var(--primary);
    color: #ffffff;
    border: 1px solid var(--primary);
}

.btn-modal-stats:hover {
    background-color: var(--primary-hover);
}

                                                            
                                                  
                                                               
@media (max-width: 768px) {
    .reading-top-bar {
        padding: 0 12px;
    }

    .bar-center {
        max-width: 180px;
    }

    .reading-container {
        padding: 12px 10px 80px 10px;
    }

    .reading-card {
        padding: 18px 14px;
    }

    .passage-title {
        font-size: 1.25rem;
    }

    .passage-body {
        font-size: 0.98rem;
        line-height: 1.9;
    }

    .gap-field {
        width: 85px;
        font-size: 0.88rem;
    }

    .reading-actions {
        padding: 10px 14px;
    }

    .btn-reset,
    .btn-send {
        padding: 8px 14px;
        font-size: 0.82rem;
    }

    .modal-hero {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }

    .cefr-badge-row {
        justify-content: center;
    }
}