/* ==========================================
   RJ STUDY PRO - PREMIUM ASSESSMENT STYLES
   ========================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --bg-main: #060913;
    --bg-panel: rgba(17, 24, 39, 0.7);
    --text-primary: #F9FAFB;
    --text-secondary: #9CA3AF;
    --accent-color: #00E5FF;
    --accent-hover: #00B2CC;
    --danger-color: #EF4444;
    --success-color: #10B981;
    --border-color: rgba(255, 255, 255, 0.1);
    --font-main: 'Inter', sans-serif;
}

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    max-width: 100%;
    overflow-x: hidden !important;
    box-sizing: border-box;
}

*, *:before, *:after {
    box-sizing: border-box;
}

body {
    background-color: var(--bg-main);
    background-image:
        radial-gradient(circle at top right, rgba(0, 229, 255, 0.1), transparent 40%),
        radial-gradient(circle at bottom left, rgba(239, 68, 68, 0.05), transparent 40%);
    color: var(--text-primary);
    font-family: var(--font-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.hidden { display: none !important; }

.glass-panel {
    background: var(--bg-panel);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

/* Header */
.exam-header {
    padding: 16px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
    background: rgba(6, 9, 19, 0.95);
    width: 100%;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 1.2rem;
}

.pro-badge {
    background: linear-gradient(135deg, var(--accent-color), #0077FF);
    color: #000;
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 800;
}

.timer-box {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-color);
    padding: 8px 16px;
    border-radius: 8px;
    background: rgba(0, 229, 255, 0.05);
    border: 1px solid rgba(0, 229, 255, 0.3);
}

.glow-effect { box-shadow: 0 0 15px rgba(0, 229, 255, 0.2); }

.candidate-badge {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255,255,255,0.05);
    padding: 6px 16px 6px 6px;
    border-radius: 50px;
    font-weight: 500;
}

.avatar {
    width: 30px;
    height: 30px;
    background: var(--accent-color);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #000;
    font-weight: bold;
}

/* Main Layout (Desktop) */
.exam-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 24px;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: 32px;
    flex-grow: 1;
}

/* Left Column */
.question-section {
    border-radius: 16px;
    padding: 32px;
    display: flex;
    flex-direction: column;
    width: 100%;
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
    margin-bottom: 24px;
}

.q-num {
    font-weight: 600;
    color: var(--accent-color);
    letter-spacing: 1px;
    font-size: 0.95rem;
}

.q-type {
    background: rgba(255, 255, 255, 0.1);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
}

#question-text {
    font-size: 1.4rem;
    line-height: 1.6;
    font-weight: 500;
    margin-bottom: 32px;
    word-break: break-word;
}

/* Options */
.options-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: auto;
    width: 100%;
}

.option-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    padding: 18px 24px;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 1.05rem;
    transition: all 0.2s ease;
    width: 100%;
    word-break: break-word;
}

.option-card:hover {
    background: rgba(255, 255, 255, 0.08);
}

.option-card.selected {
    background: rgba(0, 229, 255, 0.1);
    border-color: var(--accent-color);
    box-shadow: 0 0 15px rgba(0, 229, 255, 0.15);
}

.option-card input[type="radio"] {
    appearance: none;
    -webkit-appearance: none;
    width: 22px;
    height: 22px;
    border: 2px solid var(--text-secondary);
    border-radius: 50%;
    outline: none;
    cursor: pointer;
    position: relative;
    transition: 0.2s;
    flex-shrink: 0;
}

.option-card.selected input[type="radio"] {
    border-color: var(--accent-color);
}

.option-card.selected input[type="radio"]::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    background: var(--accent-color);
    border-radius: 50%;
}

/* Footer Nav (Desktop) */
.action-footer {
    display: flex;
    justify-content: space-between;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    gap: 12px;
}

.nav-btn {
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s;
    font-family: inherit;
}

.nav-btn.prev,
.nav-btn.clear {
    background: transparent;
    border: 1px solid var(--text-secondary);
    color: var(--text-primary);
}

.nav-btn.next {
    background: var(--accent-color);
    color: #000;
    border: none;
}

/* Right Column (Matrix) */
.sidebar-section {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.matrix-card {
    border-radius: 16px;
    padding: 24px;
}

.matrix-title {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    text-align: center;
}

.matrix-legend {
    display: flex;
    justify-content: space-between;
    margin-bottom: 24px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.legend-item { display: flex; align-items: center; gap: 6px; }
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.answered { background: var(--success-color); }
.dot.current { border: 2px solid var(--accent-color); }
.dot.unanswered { border: 1px solid var(--text-secondary); }

.palette-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
}

.palette-num {
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    height: 44px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
}

.palette-num.answered {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success-color);
    border-color: rgba(16, 185, 129, 0.4);
}

.palette-num.active {
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
}

.submit-exam-btn {
    background: linear-gradient(135deg, var(--danger-color), #BE123C);
    color: #fff;
    border: none;
    padding: 16px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1.05rem;
    cursor: pointer;
    width: 100%;
}

/* Modals */
.modal-overlay, .locked-container {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.modal-card, .locked-card {
    border-radius: 16px;
    padding: 30px;
    max-width: 450px;
    width: 90%;
    text-align: center;
}

.matrix-toggle-btn, .matrix-close-btn { display: none; }

/* ==============================================================
   MOBILE RESPONSIVE OVERRIDES (STRICT 1-COLUMN)
   ============================================================== */
@media screen and (max-width: 900px) {
    .exam-layout {
        display: flex !important;
        flex-direction: column !important;
        padding: 12px !important;
        padding-bottom: 160px !important;
        width: 100% !important;
        max-width: 100% !important;
    }

    .exam-header {
        padding: 10px 14px;
        flex-wrap: wrap;
    }

    .candidate-badge { display: none !important; }

    .timer-box {
        width: 100%;
        justify-content: center;
        font-size: 1.1rem;
        padding: 6px;
        margin-top: 6px;
    }

    .question-section {
        padding: 14px !important;
        width: 100% !important;
    }

    #question-text {
        font-size: 1.1rem !important;
        margin-bottom: 16px !important;
    }

    .options-grid { gap: 10px !important; }

    .option-card {
        padding: 12px 14px !important;
        font-size: 0.95rem !important;
        width: 100% !important;
    }

    /* Hide desktop question footer on mobile */
    .question-section .action-footer {
        display: none !important;
    }

    /* Mobile Fixed Bottom Bar */
    .mobile-bottom-bar {
        position: fixed !important;
        bottom: 0 !important;
        left: 0 !important;
        right: 0 !important;
        width: 100% !important;
        z-index: 2000 !important;
        background: #060913 !important;
        border-top: 1px solid var(--border-color) !important;
        padding: 8px 12px !important;
        padding-bottom: calc(8px + env(safe-area-inset-bottom, 0px)) !important;
        display: flex !important;
        flex-direction: column !important;
        gap: 8px !important;
    }

    .mobile-bottom-bar .nav-row {
        display: flex !important;
        gap: 8px !important;
        width: 100% !important;
    }

    .mobile-bottom-bar .nav-btn {
        flex: 1 !important;
        padding: 11px 4px !important;
        font-size: 0.85rem !important;
        min-height: 44px !important;
        border-radius: 8px !important;
    }

    .mobile-bottom-bar .nav-btn.prev,
    .mobile-bottom-bar .nav-btn.clear {
        background: transparent !important;
        border: 1px solid var(--text-secondary) !important;
        color: var(--text-primary) !important;
    }

    .mobile-bottom-bar .nav-btn.next {
        background: var(--accent-color) !important;
        color: #000 !important;
        border: none !important;
    }

    .mobile-bottom-bar .mobile-submit-btn {
        width: 100% !important;
        background: linear-gradient(135deg, var(--danger-color), #BE123C) !important;
        color: #fff !important;
        border: none !important;
        padding: 12px !important;
        border-radius: 8px !important;
        font-weight: 700 !important;
        font-size: 0.95rem !important;
    }

    /* Floating Matrix Drawer Icon */
    .matrix-toggle-btn {
        display: flex !important;
        position: fixed !important;
        bottom: 145px !important;
        right: 14px !important;
        width: 50px !important;
        height: 50px !important;
        border-radius: 50% !important;
        background: var(--accent-color) !important;
        color: #000 !important;
        border: none !important;
        box-shadow: 0 4px 18px rgba(0, 229, 255, 0.5) !important;
        font-size: 1.4rem !important;
        font-weight: 900 !important;
        z-index: 2100 !important;
        align-items: center !important;
        justify-content: center !important;
    }

    /* Matrix Fullscreen Off-Canvas Drawer */
    .sidebar-section {
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        width: 100% !important;
        height: 100% !important;
        background: #060913 !important;
        z-index: 3000 !important;
        padding: 20px 16px !important;
        overflow-y: auto !important;
        transform: translateX(100%) !important;
        transition: transform 0.3s ease !important;
        display: flex !important;
        flex-direction: column !important;
        gap: 16px !important;
    }

    .sidebar-section.active {
        transform: translateX(0) !important;
    }

    .matrix-close-btn {
        display: block !important;
        width: 100% !important;
        background: rgba(239, 68, 68, 0.15) !important;
        border: 1px solid var(--danger-color) !important;
        color: var(--danger-color) !important;
        padding: 12px !important;
        border-radius: 8px !important;
        font-size: 1rem !important;
        font-weight: 700 !important;
    }
}