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

:root {
    --primary-color: #4f46e5;
    --primary-dark: #4338ca;
    --secondary-color: #10b981;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background: var(--bg-primary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    background: var(--bg-primary);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.hero-content h1 {
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
}

.btn-block {
    display: block;
    width: 100%;
}

/* Features Section */
.features {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--bg-primary);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--text-secondary);
}

/* Dashboard */
.dashboard {
    padding: 40px 0;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.header-actions {
    display: flex;
    gap: 15px;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

.dashboard-card {
    background: var(--bg-primary);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-header {
    padding: 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-content {
    padding: 20px;
}

/* AI Assistant */
.ai-assistant {
    padding: 40px 0;
}

.ai-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 30px;
    margin-top: 30px;
}

.ai-sidebar {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 20px;
}

.query-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: 5px;
}

.query-option:hover {
    background: var(--border-color);
}

.query-option.active {
    background: var(--primary-color);
    color: white;
}

.ai-main {
    background: var(--bg-primary);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 30px;
}

.ai-welcome {
    text-align: center;
}

.welcome-icon i {
    font-size: 5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.ai-welcome h2 {
    margin-bottom: 20px;
}

.ai-welcome p {
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.sample-queries {
    margin-top: 30px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
    text-align: left;
}

.sample-queries h4 {
    margin-bottom: 15px;
}

.sample-queries ul {
    list-style: none;
}

.sample-queries li {
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.sample-queries li:last-child {
    border-bottom: none;
}

.ai-response {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 20px;
}

.response-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.btn-copy {
    padding: 8px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
}

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

.response-content {
    line-height: 1.8;
    margin-bottom: 20px;
}

.response-actions {
    display: flex;
    gap: 15px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

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

.auth-box {
    background: var(--bg-primary);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 400px;
}

.auth-box h2 {
    text-align: center;
    margin-bottom: 30px;
}

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

.auth-form label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.auth-form input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
}

.auth-form input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.alert {
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 20px;
}

.alert-error {
    background: #fee2e2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

.auth-link {
    text-align: center;
    margin-top: 20px;
}

.auth-link a {
    color: var(--primary-color);
    text-decoration: none;
}

/* Portfolio View */
.portfolio-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
}

.portfolio-avatar {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 4px solid white;
    margin-bottom: 20px;
}

.portfolio-headline {
    font-size: 1.5rem;
    margin: 20px 0;
    opacity: 0.9;
}

.portfolio-section {
    padding: 40px 0;
    border-bottom: 1px solid var(--border-color);
}

.portfolio-section:last-child {
    border-bottom: none;
}

.portfolio-section h2 {
    margin-bottom: 30px;
}

.experience-item,
.education-item,
.achievement-item {
    margin-bottom: 25px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
}

.experience-item h3,
.education-item h3,
.achievement-item h3 {
    margin-bottom: 10px;
}

.company,
.institution {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 5px;
}

.date {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-badge {
    background: var(--primary-color);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
    }
    
    .hero-content {
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .ai-layout {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        display: none;
    }
    
    .mobile-menu {
        display: block;
    }
}