/* ===================================================
   CodeTest Assessment Portal - Crisp Modern Light Theme
   =================================================== */

:root {
    --bg-main: #F8FAFC;
    --bg-surface: #FFFFFF;
    --bg-card: #FFFFFF;
    --bg-card-hover: #F1F5F9;
    --bg-subtle: #F1F5F9;
    --border-subtle: #E2E8F0;
    --border-hover: #CBD5E1;
    --border-focus: #4F46E5;
    
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #94A3B8;
    
    --primary: #4F46E5;
    --primary-light: #6366F1;
    --primary-bg: #EEF2FF;
    --primary-border: #C7D2FE;
    --primary-glow: rgba(79, 70, 229, 0.15);
    
    --accent-emerald: #059669;
    --accent-emerald-bg: #ECFDF5;
    --accent-emerald-border: #A7F3D0;
    
    --accent-amber: #D97706;
    --accent-amber-bg: #FFFBEB;
    --accent-amber-border: #FDE68A;
    
    --accent-rose: #DC2626;
    --accent-rose-bg: #FEF2F2;
    --accent-rose-border: #FECACA;
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-modal: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    overflow-y: scroll;
}

::-webkit-scrollbar {
    width: 9px;
    height: 9px;
}

::-webkit-scrollbar-track {
    background: #F1F5F9;
}

::-webkit-scrollbar-thumb {
    background: #CBD5E1;
    border-radius: 6px;
    border: 2px solid #F1F5F9;
}

::-webkit-scrollbar-thumb:hover {
    background: #94A3B8;
}

body.light-theme {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

/* ===================================================
   TOP NAVBAR
   =================================================== */
.navbar {
    height: 72px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 28px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.brand-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary), #3730A3);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #fff;
    box-shadow: 0 4px 12px var(--primary-glow);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-title {
    font-size: 16px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.3px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.badge-role {
    font-size: 11px;
    font-weight: 700;
    background: var(--primary-bg);
    color: var(--primary);
    border: 1px solid var(--primary-border);
    padding: 3px 9px;
    border-radius: 20px;
    letter-spacing: 0.2px;
}

.brand-sub {
    font-size: 12.5px;
    color: var(--text-secondary);
}

.brand-sub strong {
    color: var(--text-primary);
}

/* Timer Pill */
.nav-center {
    display: flex;
    align-items: center;
}

.timer-pill {
    background: var(--accent-amber-bg);
    border: 1px solid var(--accent-amber-border);
    padding: 8px 18px;
    border-radius: 30px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 700;
    color: var(--accent-amber);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.timer-pill i {
    font-size: 15px;
}

.timer-label {
    font-size: 11px;
    font-family: var(--font-sans);
    color: #92400E;
    text-transform: uppercase;
    font-weight: 600;
}

.timer-pill.warning {
    border-color: var(--accent-rose);
    background: var(--accent-rose-bg);
    color: var(--accent-rose);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* Nav Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

.save-status {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent-emerald);
    background: var(--accent-emerald-bg);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid var(--accent-emerald-border);
    transition: all 0.2s ease;
}

.save-status.saving {
    color: var(--accent-amber);
    background: var(--accent-amber-bg);
    border-color: var(--accent-amber-border);
}

.btn-switch-user {
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    background: #fff;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-switch-user:hover {
    background: var(--bg-subtle);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.btn-admin-peek {
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--primary-border);
    background: var(--primary-bg);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-admin-peek:hover {
    background: #E0E7FF;
    border-color: #A5B4FC;
}

.btn-submit-main {
    background: linear-gradient(135deg, var(--accent-emerald), #047857);
    color: #fff;
    border: none;
    font-size: 14px;
    font-weight: 700;
    padding: 9px 20px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 12px rgba(5, 150, 105, 0.25);
    transition: all 0.2s ease;
}

.btn-submit-main:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(5, 150, 105, 0.35);
}

/* ===================================================
   MAIN LAYOUT (Sidebar + Stage)
   =================================================== */
.app-layout {
    display: grid;
    grid-template-columns: 350px 1fr;
    min-height: calc(100vh - 72px);
    height: auto;
    overflow: visible;
}

/* ===================================================
   SIDEBAR
   =================================================== */
.sidebar {
    background: #FFFFFF;
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 72px;
    height: calc(100vh - 72px);
    overflow: hidden;
    z-index: 10;
}

.sidebar-header {
    padding: 20px 22px 16px;
    border-bottom: 1px solid var(--border-subtle);
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    margin-bottom: 10px;
}

.progress-title {
    color: var(--text-secondary);
    font-weight: 600;
}

.progress-count {
    color: var(--primary);
    font-weight: 700;
    font-family: var(--font-mono);
}

.progress-bar-bg {
    height: 8px;
    background: #E2E8F0;
    border-radius: 10px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent-emerald));
    border-radius: 10px;
    transition: width 0.3s ease;
}

/* Category Filter Tabs */
.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-subtle);
    background: #F8FAFC;
    max-height: 120px;
    overflow-y: auto;
}

.cat-pill {
    background: #FFFFFF;
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.cat-pill:hover {
    background: #F1F5F9;
    color: var(--text-primary);
}

.cat-pill.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    box-shadow: 0 2px 6px var(--primary-glow);
}

/* Question List in Sidebar */
.question-list {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.q-nav-item {
    background: #FFFFFF;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 12px 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.q-nav-item:hover {
    background: #F8FAFC;
    border-color: #CBD5E1;
    transform: translateX(2px);
}

.q-nav-item.active {
    background: #EEF2FF;
    border-color: var(--primary);
    box-shadow: 0 2px 8px var(--primary-glow);
}

.q-nav-indicator {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: #F1F5F9;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    flex-shrink: 0;
    margin-top: 2px;
}

.q-nav-item.answered .q-nav-indicator {
    background: var(--accent-emerald);
    color: #fff;
}

.q-nav-info {
    flex: 1;
    min-width: 0;
}

.q-nav-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 4px;
    word-break: break-word;
}

.q-nav-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 11px;
    color: var(--text-muted);
}

.q-nav-cat {
    color: var(--primary);
    font-weight: 600;
    background: var(--primary-bg);
    padding: 1px 7px;
    border-radius: 8px;
    font-size: 10.5px;
}

.sidebar-footer {
    padding: 14px 18px;
    border-top: 1px solid var(--border-subtle);
    background: #F8FAFC;
}

.cand-card {
    display: flex;
    align-items: center;
    gap: 12px;
}

.cand-card .avatar {
    width: 38px;
    height: 38px;
    background: var(--primary-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 17px;
    border: 1px solid var(--primary-border);
}

.cand-details {
    display: flex;
    flex-direction: column;
}

.cand-details strong {
    font-size: 13.5px;
    color: var(--text-primary);
}

.cand-details small {
    font-size: 11.5px;
    color: var(--text-muted);
}

/* ===================================================
   MAIN STAGE (Questions + Code Editor)
   =================================================== */
.stage {
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 72px);
    height: auto;
    overflow: visible;
    padding: 28px 40px 90px;
    gap: 24px;
    background: var(--bg-main);
}

/* Question Box */
.question-container {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 26px 32px;
    box-shadow: var(--shadow-card);
}

.question-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.q-badge {
    background: var(--primary-bg);
    color: var(--primary);
    border: 1px solid var(--primary-border);
    font-size: 12px;
    font-weight: 700;
    padding: 3px 12px;
    border-radius: 20px;
}

.q-type {
    background: var(--accent-emerald-bg);
    color: var(--accent-emerald);
    border: 1px solid var(--accent-emerald-border);
    font-size: 12px;
    font-weight: 600;
    padding: 3px 12px;
    border-radius: 20px;
}

.q-number {
    font-size: 12.5px;
    color: var(--text-muted);
    margin-left: auto;
    font-family: var(--font-mono);
    font-weight: 600;
}

.question-title {
    font-size: 22px;
    font-weight: 800;
    line-height: 1.35;
    margin-bottom: 14px;
    color: var(--text-primary);
    letter-spacing: -0.4px;
}

.question-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.question-desc code {
    background: #F1F5F9;
    color: #4338CA;
    padding: 2px 7px;
    border-radius: 5px;
    font-family: var(--font-mono);
    font-size: 13.5px;
    border: 1px solid #E2E8F0;
}

.question-desc pre {
    background: #0F172A;
    border: 1px solid #334155;
    border-radius: var(--radius-md);
    padding: 14px 18px;
    margin: 12px 0;
    overflow-x: auto;
}

.question-desc pre code {
    background: none;
    color: #34D399;
    border: none;
    padding: 0;
}

/* Ideal Points Box */
.ideal-points-box {
    background: #F8FAFC;
    border: 1px solid #E2E8F0;
    border-radius: var(--radius-md);
    padding: 16px 20px;
}

.points-header {
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.ideal-points-box ul {
    list-style: none;
    padding-left: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 8px 16px;
}

.ideal-points-box li {
    font-size: 13px;
    color: var(--text-secondary);
    position: relative;
    padding-left: 18px;
    line-height: 1.5;
}

.ideal-points-box li::before {
    content: "✓";
    position: absolute;
    left: 2px;
    color: var(--accent-emerald);
    font-weight: bold;
}

/* Editor Container */
.editor-container {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-card);
}

.editor-header {
    padding: 14px 22px;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #F8FAFC;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.editor-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

.editor-title i {
    color: var(--primary);
}

.editor-tools {
    display: flex;
    align-items: center;
    gap: 14px;
}

.char-count {
    font-size: 12.5px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.btn-clear {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    transition: color 0.2s;
    padding: 4px;
}

.btn-clear:hover {
    color: var(--accent-rose);
}

.editor-body {
    padding: 20px 22px;
}

.code-textarea {
    width: 100%;
    min-height: 280px;
    background: #F8FAFC;
    border: 1px solid #CBD5E1;
    border-radius: var(--radius-md);
    color: #0F172A;
    font-family: var(--font-mono);
    font-size: 14.5px;
    line-height: 1.65;
    padding: 18px 20px;
    resize: vertical;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s, background-color 0.2s;
}

.code-textarea:focus {
    background: #FFFFFF;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.editor-footer {
    padding: 16px 22px;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #F8FAFC;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.btn-nav {
    background: #FFFFFF;
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    padding: 10px 20px;
    font-size: 13.5px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s;
}

.btn-nav:hover:not(:disabled) {
    background: #F1F5F9;
    border-color: var(--border-hover);
}

.btn-nav:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.btn-nav.btn-next {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    box-shadow: 0 2px 8px var(--primary-glow);
}

.btn-nav.btn-next:hover {
    background: #4338CA;
}

.center-save-notice {
    font-size: 12.5px;
    color: var(--text-muted);
}

/* ===================================================
   MODALS
   =================================================== */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(6px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: 20px;
}

.modal-backdrop.open {
    display: flex;
}

.modal-card {
    background: #FFFFFF;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 540px;
    box-shadow: var(--shadow-modal);
    overflow: hidden;
    animation: modalSlide 0.22s ease-out;
}

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

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #F8FAFC;
}

.modal-header h3 {
    font-size: 17.5px;
    font-weight: 800;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-close-modal {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
    line-height: 1;
}

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

.modal-body {
    padding: 24px 28px;
    color: var(--text-secondary);
    font-size: 14.5px;
}

.form-field {
    margin-bottom: 16px;
}

.form-field label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-field input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: var(--font-sans);
    color: var(--text-primary);
    outline: none;
    background: #F8FAFC;
    transition: all 0.2s;
}

.form-field input:focus {
    background: #fff;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.summary-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin: 20px 0;
}

.stat-box {
    background: #F8FAFC;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 14px 10px;
    text-align: center;
}

.stat-val {
    display: block;
    font-size: 22px;
    font-weight: 800;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.stat-lbl {
    font-size: 11.5px;
    color: var(--text-muted);
    font-weight: 600;
}

.modal-alert {
    background: var(--accent-amber-bg);
    border: 1px solid var(--accent-amber-border);
    color: #92400E;
    font-size: 13px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    line-height: 1.45;
}

.modal-footer {
    padding: 16px 28px;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    background: #F8FAFC;
}

.btn-cancel {
    background: #FFFFFF;
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    padding: 10px 18px;
    font-size: 13.5px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.btn-cancel:hover {
    background: #F1F5F9;
    color: var(--text-primary);
}

.btn-confirm-submit {
    background: linear-gradient(135deg, var(--accent-emerald), #047857);
    border: none;
    color: #fff;
    padding: 10px 22px;
    font-size: 13.5px;
    font-weight: 700;
    border-radius: var(--radius-sm);
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(5, 150, 105, 0.25);
}

/* Success Card */
.success-card {
    text-align: center;
    padding: 40px 36px;
    max-width: 580px;
}

.success-icon {
    font-size: 60px;
    color: var(--accent-emerald);
    margin-bottom: 16px;
}

.success-card h2 {
    font-size: 24px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.success-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
}

.interview-next-steps {
    background: var(--primary-bg);
    border: 1px dashed var(--primary-border);
    border-radius: var(--radius-md);
    padding: 18px 22px;
    text-align: left;
    margin-bottom: 26px;
}

.interview-next-steps h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 6px;
}

.interview-next-steps p {
    font-size: 13.5px;
    color: var(--text-secondary);
    margin-bottom: 0;
}

.btn-view-eval {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary);
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    font-weight: 700;
    padding: 11px 24px;
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-view-eval:hover {
    background: #4338CA;
}

/* Responsive */
@media (max-width: 900px) {
    .app-layout {
        grid-template-columns: 1fr;
        height: auto;
    }
    .sidebar {
        height: 350px;
        position: static;
    }
}