/* ==================== RESET & BASE ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --primary-light: #EEF2FF;
    --primary-50: #E0E7FF;

    --success: #059669;
    --success-light: #ECFDF5;
    --success-border: #A7F3D0;

    --danger: #DC2626;
    --danger-light: #FEF2F2;
    --danger-border: #FECACA;

    --warning: #D97706;
    --warning-light: #FFFBEB;
    --warning-border: #FDE68A;

    --info: #2563EB;
    --info-light: #EFF6FF;
    --info-border: #BFDBFE;

    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;

    --radius: 10px;
    --radius-sm: 6px;
    --radius-lg: 14px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);

    --font: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Cascadia Code', 'Fira Code', 'Consolas', 'Monaco', monospace;
}

html {
    font-size: 14px;
}

body {
    font-family: var(--font);
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
}

/* ==================== LOGIN PAGE ==================== */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.login-wrapper {
    width: 100%;
    max-width: 420px;
}

.login-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 40px 36px;
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(0,0,0,0.02);
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo {
    margin-bottom: 16px;
}

.login-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.login-subtitle {
    color: var(--gray-500);
    font-size: 0.9rem;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-form label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 12px;
    color: var(--gray-400);
    pointer-events: none;
}

.input-wrapper input {
    width: 100%;
    padding: 11px 12px 11px 40px;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-family: var(--font);
    color: var(--gray-800);
    background: white;
    transition: all 0.2s;
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.input-wrapper input::placeholder {
    color: var(--gray-400);
}

.toggle-password {
    position: absolute;
    right: 10px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray-400);
    padding: 4px;
    display: flex;
}

.toggle-password:hover {
    color: var(--gray-600);
}

.login-footer {
    text-align: center;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-100);
}

.login-footer p {
    color: var(--gray-400);
    font-size: 0.8rem;
}

/* Alert */
.alert {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    margin-bottom: 20px;
}

.alert-error {
    background: var(--danger-light);
    color: var(--danger);
    border: 1px solid var(--danger-border);
}

/* ==================== BUTTONS ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 18px;
    border: 1.5px solid transparent;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
    font-family: var(--font);
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
}

.btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-full { width: 100%; }
.btn-sm { padding: 7px 14px; font-size: 0.8rem; }
.btn-xs { padding: 4px 10px; font-size: 0.75rem; }
.btn-lg { padding: 12px 24px; font-size: 1rem; }

.btn-primary {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}
.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    box-shadow: var(--shadow-sm);
}

.btn-success {
    background: var(--success);
    color: white;
    border-color: var(--success);
}
.btn-success:hover:not(:disabled) {
    background: #047857;
    border-color: #047857;
    box-shadow: var(--shadow-sm);
}

.btn-danger {
    background: var(--danger);
    color: white;
    border-color: var(--danger);
}
.btn-danger:hover:not(:disabled) {
    background: #B91C1C;
    border-color: #B91C1C;
}

.btn-secondary {
    background: var(--gray-600);
    color: white;
    border-color: var(--gray-600);
}
.btn-secondary:hover:not(:disabled) {
    background: var(--gray-700);
    border-color: var(--gray-700);
}

.btn-outline {
    background: transparent;
    color: var(--gray-600);
    border-color: var(--gray-300);
}
.btn-outline:hover:not(:disabled) {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

.btn-ghost {
    background: transparent;
    color: var(--gray-500);
    border-color: transparent;
}
.btn-ghost:hover:not(:disabled) {
    background: var(--gray-100);
    color: var(--gray-700);
}

/* ==================== HEADER ==================== */
.header {
    background: white;
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.header-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-900);
}

.header-badge {
    display: inline-block;
    padding: 1px 8px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

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

.header-user {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--gray-600);
    font-size: 0.85rem;
    font-weight: 500;
}

/* ==================== MAIN LAYOUT ==================== */
.main {
    padding: 24px;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    align-items: start;
}

@media (max-width: 960px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }
}

.col-left, .col-right {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* ==================== CARDS ==================== */
.card {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    border-bottom: 1px solid var(--gray-100);
    background: var(--gray-50);
}

.card-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--gray-800);
}

.card-title svg {
    color: var(--gray-500);
    flex-shrink: 0;
}

.card-body {
    padding: 18px;
}

.card-info {
    border-left: 4px solid var(--primary);
}

.card-action {
    border: 2px solid var(--gray-200);
}

/* ==================== STUDENT INFO ==================== */
.student-info {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 18px;
}

.student-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.student-details {
    flex: 1;
}

.student-name {
    font-weight: 700;
    font-size: 1rem;
    color: var(--gray-900);
}

.student-meta {
    display: flex;
    gap: 16px;
    font-size: 0.8rem;
    color: var(--gray-500);
    margin-top: 2px;
}

.student-semester {
    text-align: right;
    font-size: 0.8rem;
    color: var(--gray-600);
}

.student-semester small {
    display: block;
    color: var(--gray-400);
    font-size: 0.75rem;
}

/* ==================== FORMS ==================== */
.form-group {
    margin-bottom: 14px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.input {
    width: 100%;
    padding: 10px 12px;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-family: var(--font);
    color: var(--gray-800);
    background: white;
    transition: all 0.2s;
    resize: vertical;
}

.input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.input::placeholder {
    color: var(--gray-400);
}

.input-mono {
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.input-sm {
    width: 100px;
    padding: 7px 10px;
    font-size: 0.85rem;
    text-align: center;
}

.form-row {
    display: flex;
    gap: 8px;
    margin-bottom: 14px;
}

.form-inline {
    display: flex;
    align-items: center;
    gap: 10px;
}

.form-inline label {
    margin-bottom: 0;
    white-space: nowrap;
}

.form-hint {
    display: block;
    font-size: 0.75rem;
    color: var(--gray-400);
    margin-top: 4px;
}

.settings-row {
    display: flex;
    gap: 20px;
    margin-bottom: 14px;
}

@media (max-width: 600px) {
    .settings-row {
        flex-direction: column;
        gap: 10px;
    }
}

/* Checkbox */
.checkbox-label {
    display: flex !important;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-weight: 500 !important;
    color: var(--gray-700) !important;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
    cursor: pointer;
}

/* ==================== COURSE LIST ==================== */
.course-list {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    background: var(--gray-50);
}

.course-list::-webkit-scrollbar {
    width: 6px;
}
.course-list::-webkit-scrollbar-track {
    background: transparent;
}
.course-list::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 3px;
}

.course-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 30px 20px;
    color: var(--gray-400);
    font-size: 0.8rem;
}

.course-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-bottom: 1px solid var(--gray-100);
    transition: background 0.15s;
}

.course-item:last-child {
    border-bottom: none;
}

.course-item:hover {
    background: white;
}

.course-item-info {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 0;
}

.course-item-code {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gray-800);
}

.course-item-class {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--gray-500);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.course-item-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.course-badge {
    padding: 2px 8px;
    border-radius: 20px;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.badge-pending { background: var(--warning-light); color: var(--warning); }
.badge-running { background: var(--info-light); color: var(--info); }
.badge-success { background: var(--success-light); color: var(--success); }
.badge-error { background: var(--danger-light); color: var(--danger); }

/* ==================== ACTION AREA ==================== */
.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 14px;
}

.status-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: var(--radius);
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    font-size: 0.8rem;
    color: var(--gray-600);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gray-400);
    flex-shrink: 0;
}

.status-bar.status-running {
    background: var(--info-light);
    border-color: var(--info-border);
    color: var(--info);
}
.status-bar.status-running .status-dot {
    background: var(--info);
    animation: pulse 1.5s infinite;
}

.status-bar.status-success {
    background: var(--success-light);
    border-color: var(--success-border);
    color: var(--success);
}
.status-bar.status-success .status-dot {
    background: var(--success);
}

.status-bar.status-error {
    background: var(--danger-light);
    border-color: var(--danger-border);
    color: var(--danger);
}
.status-bar.status-error .status-dot {
    background: var(--danger);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* ==================== PROGRESS ==================== */
.progress-count {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--primary);
}

.progress-bar {
    height: 6px;
    background: var(--gray-200);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 14px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), #818CF8);
    border-radius: 3px;
    transition: width 0.4s ease;
}

.progress-courses {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.progress-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    background: var(--gray-50);
    border: 1px solid var(--gray-100);
}

.progress-item.p-success { background: var(--success-light); border-color: var(--success-border); }
.progress-item.p-running { background: var(--info-light); border-color: var(--info-border); }
.progress-item.p-error { background: var(--danger-light); border-color: var(--danger-border); }

.progress-item-code {
    font-family: var(--font-mono);
    font-weight: 700;
    min-width: 80px;
}

.progress-item-msg {
    flex: 1;
    color: var(--gray-600);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ==================== LOG ==================== */
.card-log .card-body {
    padding: 0;
}

.log-container {
    max-height: 400px;
    overflow-y: auto;
    padding: 10px 14px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    line-height: 1.8;
}

.log-container::-webkit-scrollbar {
    width: 6px;
}
.log-container::-webkit-scrollbar-track {
    background: transparent;
}
.log-container::-webkit-scrollbar-thumb {
    background: var(--gray-200);
    border-radius: 3px;
}

.log-entry {
    display: flex;
    gap: 10px;
    padding: 3px 0;
    border-bottom: 1px solid var(--gray-50);
}

.log-time {
    color: var(--gray-400);
    flex-shrink: 0;
    min-width: 60px;
}

.log-msg {
    word-break: break-word;
}

.log-info .log-msg { color: var(--gray-600); }
.log-success .log-msg { color: var(--success); font-weight: 600; }
.log-error .log-msg { color: var(--danger); }
.log-warning .log-msg { color: var(--warning); }

/* ==================== GUIDE ==================== */
.card-guide .card-body {
    padding: 14px 18px;
}

.guide-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.guide-item {
    display: flex;
    gap: 12px;
}

.guide-step {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    flex-shrink: 0;
}

.guide-item strong {
    display: block;
    font-size: 0.85rem;
    color: var(--gray-800);
    margin-bottom: 2px;
}

.guide-item p {
    font-size: 0.78rem;
    color: var(--gray-500);
    line-height: 1.5;
}

.guide-item code {
    display: inline-block;
    padding: 1px 6px;
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--primary);
}

/* ==================== TOKEN STATUS ==================== */
.token-status {
    margin-top: 10px;
    padding: 0;
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.token-status:empty {
    display: none;
}

.token-status.ts-success {
    padding: 10px 12px;
    background: var(--success-light);
    border: 1px solid var(--success-border);
    color: var(--success);
}

.token-status.ts-error {
    padding: 10px 12px;
    background: var(--danger-light);
    border: 1px solid var(--danger-border);
    color: var(--danger);
}

.token-status.ts-info {
    padding: 10px 12px;
    background: var(--info-light);
    border: 1px solid var(--info-border);
    color: var(--info);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
    .main {
        padding: 16px;
    }

    .header-inner {
        padding: 10px 16px;
    }

    .header-title {
        font-size: 0.95rem;
    }

    .action-buttons {
        grid-template-columns: 1fr;
    }

    .student-info {
        flex-wrap: wrap;
    }

    .student-semester {
        text-align: left;
        width: 100%;
        margin-top: 4px;
    }
}

/* ==================== ADMIN: STATS ==================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.stat-item {
    text-align: center;
    padding: 16px 10px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
}

.stat-number {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--gray-500);
    font-weight: 500;
}

/* ==================== ADMIN: USER LIST ==================== */
.user-list {
    max-height: 600px;
    overflow-y: auto;
}

.user-item {
    padding: 14px 18px;
    border-bottom: 1px solid var(--gray-100);
    transition: background 0.15s;
}

.user-item:last-child {
    border-bottom: none;
}

.user-item:hover {
    background: var(--gray-50);
}

.user-item.user-disabled {
    opacity: 0.55;
    background: var(--gray-50);
}

.user-item-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}

.user-item-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-item-name {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--gray-800);
    font-family: var(--font-mono);
}

.user-item-stats {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.user-item-meta {
    display: flex;
    gap: 16px;
    font-size: 0.7rem;
    color: var(--gray-400);
    margin-bottom: 8px;
}

.user-item-actions {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
}

/* Alert success */
.alert-success {
    background: var(--success-light);
    color: var(--success);
    border: 1px solid var(--success-border);
}

/* ==================== ACTIVE TOKENS ==================== */
.user-active-tokens {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 6px;
    padding: 6px 8px;
    background: var(--info-light);
    border: 1px solid var(--info-border);
    border-radius: var(--radius-sm);
}

/* ==================== VIOLATION TABLE ==================== */
.violation-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.78rem;
}

.violation-table th {
    padding: 10px 14px;
    text-align: left;
    font-weight: 700;
    color: var(--gray-600);
    background: var(--gray-50);
    border-bottom: 2px solid var(--gray-200);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.violation-table td {
    padding: 8px 14px;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700);
}

.violation-table tbody tr:hover {
    background: var(--danger-light);
}

.violation-table tbody tr:nth-child(even) {
    background: var(--gray-50);
}

.violation-table tbody tr:nth-child(even):hover {
    background: var(--danger-light);
}