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

body {
    font-family: Inter, system-ui, -apple-system, sans-serif;
    background-color: #FFFFFF;
    color: #2D3748;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    background: white;
    border-bottom: 1px solid #E2E8F0;
    padding: 16px 0;
    margin-bottom: 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 32px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 18px;
}

.logo-text-group {
    display: flex;
    flex-direction: column;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: #2D3748;
    line-height: 1;
}

.logo-tagline {
    font-size: 12px;
    font-weight: 500;
    color: #718096;
    letter-spacing: 0.5px;
}

/* Main Navigation */
.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    justify-content: center;
}

.nav-item {
    color: #718096;
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    padding: 8px 16px;
    border-radius: 6px;
    transition: all 0.2s;
    white-space: nowrap;
}

.nav-item:hover {
    color: #2D3748;
    background: #F7FAFC;
}

.nav-item.active {
    color: #FF8C42;
    background: #FFF5F5;
    font-weight: 600;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 3px;
    background: #2D3748;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.user-section {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.welcome-text {
    color: #718096;
    font-size: 16px;
}

.profile-btn {
    background: transparent;
    color: #718096;
    border: 1px solid #E2E8F0;
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
    font-size: 14px;
    font-family: inherit;
    display: inline-block;
    line-height: 1.2;
}

.profile-btn:hover {
    color: #2D3748;
    border-color: #CBD5E0;
}

.logout-btn {
    background: transparent;
    color: #718096;
    border: 1px solid #E2E8F0;
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
    line-height: 1.2;
}

.logout-btn:hover {
    color: #2D3748;
    border-color: #CBD5E0;
}

/* Sub Navigation */
.sub-nav {
    background: #F7FAFC;
    border-bottom: 1px solid #E2E8F0;
    padding: 16px 0;
    margin-bottom: 24px;
}

.sub-nav-items {
    display: flex;
    gap: 32px;
}

.sub-nav-item {
    color: #718096;
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    padding: 8px 16px;
    border-radius: 6px;
    transition: all 0.2s;
}

.sub-nav-item:hover {
    color: #2D3748;
    background: #E2E8F0;
}

.sub-nav-item.active {
    color: #FF8C42;
    background: #FFF5F5;
    font-weight: 600;
}

/* Main content */
.container > main,
main.container {
    padding-top: 24px;
}

.page-title {
    font-size: 48px;
    font-weight: 700;
    color: #2D3748;
    margin-bottom: 16px;
}

.page-subtitle {
    font-size: 18px;
    color: #718096;
    margin-bottom: 48px;
}

.section-title {
    font-size: 32px;
    font-weight: 600;
    color: #2D3748;
    margin-bottom: 32px;
}

/* Practice intro section */
.practice-intro {
    margin-bottom: 32px;
}

.practice-intro h2 {
    font-size: 32px;
    font-weight: 600;
    color: #2D3748;
    margin-bottom: 8px;
}

.practice-intro p {
    font-size: 16px;
    color: #718096;
    margin-bottom: 0;
}

/* Quiz cards */
.quiz-grid {
    display: grid;
    gap: 24px;
    margin-bottom: 48px;
}

.domain-quiz {
    background: #F7FAFC;
    border: 1px solid #E2E8F0;
    padding: 20px;
    border-radius: 8px;
    transition: all 0.2s;
}

.domain-quiz:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.quiz-title {
    font-size: 20px;
    font-weight: 600;
    color: #2D3748;
    margin-bottom: 4px;
}

.status-badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-not-started {
    background: #EDF2F7;
    color: #4A5568;
}

.status-in-progress {
    background: #FFF5B7;
    color: #744210;
}

.status-completed {
    background: #C6F6D5;
    color: #22543D;
}

/* Progress bar */
.progress-section {
    margin-bottom: 16px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: #E2E8F0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 12px;
    display: flex;
}

.progress-fill {
    height: 100%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

.progress-fill.correct {
    background: linear-gradient(90deg, #48BB78, #38A169);
}

.progress-fill.incorrect {
    background: linear-gradient(90deg, #F56565, #E53E3E);
}

.not-started { background: linear-gradient(90deg, #E2E8F0, #CBD5E0); }
.in-progress { background: linear-gradient(90deg, #FF8C42, #E6742A); }
.completed { background: linear-gradient(90deg, #48BB78, #38A169); }

.progress-text {
    font-size: 14px;
    color: #718096;
    display: flex;
    justify-content: space-between;
}

/* Stats */
.stats {
    display: flex;
    gap: 24px;
    margin-bottom: 16px;
}

.stat-item {
    font-size: 14px;
}

.stat-label {
    color: #718096;
    display: block;
}

.stat-value {
    color: #2D3748;
    font-weight: 600;
    font-size: 18px;
}

/* Buttons */
.quiz-action {
    display: inline-block;
    background: #FF8C42;
    color: white;
    padding: 12px 24px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
}

.quiz-action:hover {
    background: #E6742A;
    transform: translateY(-1px);
}

.quiz-action.secondary {
    background: transparent;
    color: #FF8C42;
    border: 2px solid #FF8C42;
}

.quiz-action.secondary:hover {
    background: #FF8C42;
    color: white;
}

/* Collapse header nav earlier to avoid crowding on medium desktop widths */
@media (max-width: 1250px) {
    .container {
        padding: 0 12px;
    }

    /* Header */
    .header {
        padding: 12px 0;
    }

    .header-content {
        flex-wrap: wrap;
        gap: 12px;
    }

    .logo {
        align-items: center;
        order: 1;
    }

    .logo-icon {
        width: 28px;
        height: 28px;
        font-size: 14px;
    }

    .logo-text {
        font-size: 18px;
    }

    .logo-tagline {
        display: none;
    }

    /* Hamburger Menu - Show on mobile */
    .hamburger {
        display: flex;
        order: 2;
        margin-left: auto;
    }

    .user-section {
        flex-direction: row;
        align-items: center;
        gap: 8px;
        order: 3;
    }

    .welcome-text {
        display: none;
    }

    .profile-btn {
        padding: 6px 10px;
        font-size: 12px;
    }

    .logout-btn {
        padding: 6px 10px;
        font-size: 12px;
    }

    /* Main Navigation - Dropdown on mobile */
    .main-nav {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: white;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        padding: 8px 0;
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transition: all 0.3s ease;
        z-index: 1000;
        order: 4;
    }

    .main-nav.active {
        max-height: 400px;
        opacity: 1;
    }

    .nav-item {
        font-size: 15px;
        padding: 14px 24px;
        border-radius: 0;
        flex-shrink: 0;
        border-bottom: 1px solid #F7FAFC;
    }

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

    /* Sub Navigation - Keep styles in case still used elsewhere */
    .sub-nav {
        padding: 12px 0;
        margin-bottom: 24px;
    }

    .sub-nav-items {
        gap: 20px;
    }

    .sub-nav-item {
        font-size: 14px;
        padding: 6px 12px;
    }
    
    /* Quiz Cards */
    .quiz-grid {
        gap: 16px;
        margin-bottom: 24px;
    }
    
    .domain-quiz {
        padding: 16px;
    }
    
    .quiz-header {
        margin-bottom: 12px;
    }
    
    .quiz-title {
        font-size: 16px;
        margin-bottom: 2px;
    }
    
    .status-badge {
        padding: 4px 8px;
        font-size: 12px;
        letter-spacing: 0.3px;
    }
    
    /* Progress */
    .progress-section {
        margin-bottom: 12px;
    }
    
    .progress-bar {
        height: 6px;
        margin-bottom: 8px;
    }
    
    .progress-text {
        font-size: 12px;
    }
    
    /* Stats */
    .stats {
        gap: 16px;
        margin-bottom: 12px;
    }
    
    .stat-item {
        font-size: 12px;
    }
    
    .stat-value {
        font-size: 16px;
    }
    
    /* Buttons */
    .quiz-action {
        padding: 10px 16px;
        font-size: 14px;
    }
}

/* Profile page styles */
.profile-container {
    max-width: 600px;
    margin: 2rem auto;
}

.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.card-header {
    background: #f8f9fa;
    padding: 1.5rem;
    border-bottom: 1px solid #dee2e6;
}

.card-header h1 {
    margin: 0;
    color: #333;
    font-size: 1.5rem;
}

.card-body {
    padding: 1.5rem;
}

.profile-info {
    margin-bottom: 2rem;
}

.profile-field {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.profile-field label {
    font-weight: 600;
    color: #555;
    width: 80px;
    margin-right: 1rem;
}

.profile-field span {
    color: #333;
}

.profile-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
    display: inline-block;
    font-size: 14px;
    font-family: inherit;
    line-height: 1.5;
    text-align: center;
    vertical-align: middle;
}

.btn-primary {
    background: #007bff;
    color: white;
}

.btn-primary:hover {
    background: #0056b3;
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #545b62;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
}