:root {
    /* Light Mode */
    --bg-primary: #fdfcfb;
    --bg-secondary: #f8f5f2;
    --bg-card: #ffffff;
    --text-primary: #2d1b3f;
    --text-secondary: #5a4a6a;
    --accent: #f4a8a8;
    --accent-hover: #f39c9c;
    --border: #e8e2de;
    --shadow: 0 10px 40px rgba(0,0,0,0.08);
    --shadow-hover: 0 20px 60px rgba(0,0,0,0.12);
}

[data-theme="dark"] {
    --bg-primary: #1a0f2e;
    --bg-secondary: #261a3b;
    --bg-card: #2d1b3f;
    --text-primary: #f8f5f2;
    --text-secondary: #d1c7e0;
    --accent: #e07a9a;
    --accent-hover: #d96b87;
    --border: #3a2a52;
    --shadow: 0 10px 40px rgba(0,0,0,0.3);
    --shadow-hover: 0 20px 60px rgba(0,0,0,0.4);
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-hover);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 0 5%;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

.hero-content {
    max-width: 800px;
    opacity: 0;
    transform: translateY(50px);
    animation: fadeInUp 1s 0.3s forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero h1 {
    font-family: 'Playfair Display', serif;
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-weight: 300;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 500;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    cursor: pointer;
    font-family: 'Poppins', sans-serif;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: white;
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

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

.btn-secondary:hover {
    background: var(--bg-card);
    transform: translateY(-3px);
}

/* Sections */
section {
    padding: 120px 5%;
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2.5rem, 5vw, 4rem);
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    border-radius: 2px;
}

/* About */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    font-size: 1.2rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s 0.5s forwards;
}

.stats-grid {
    margin-top: 2rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.stat-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
}

.stat-number {
    font-family: 'Playfair Display', serif;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.skill-category {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 24px;
    box-shadow: var(--shadow);
    transition: all 0.4s ease;
    opacity: 0;
    transform: translateY(50px);
    animation: fadeInUp 0.8s forwards;
}

.skill-category:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.skill-category h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--accent);
}

.skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.skill-tag {
    background: var(--bg-secondary);
    padding: 0.5rem 1.2rem;
    border-radius: 20px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.skill-category:hover .skill-tag {
    background: var(--accent);
    color: white;
    transform: scale(1.05);
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.project-card {
    background: var(--bg-card);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateY(50px);
    animation: fadeInUp 0.8s forwards;
}

.project-card:hover {
    transform: translateY(-15px);
    box-shadow: var(--shadow-hover);
}

.project-image {
    height: 220px;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: white;
    position: relative;
    overflow: hidden;
}

.project-image i {
    opacity: 0.9;
}

.project-content {
    padding: 2rem;
}

.project-tagline {
    color: var(--accent);
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.project-title {
    font-family: 'Playfair Display', serif;
    font-size: 1.8rem;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.project-desc {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.features {
    margin-bottom: 1.5rem;
}

.features h4 {
    font-family: 'Poppins', sans-serif;
    color: var(--text-primary);
    margin-bottom: 0.8rem;
    font-size: 1rem;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 0.3rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.feature-list li::before {
    content: '✦';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.project-links {
    display: flex;
    gap: 1rem;
}

.project-links .btn {
    flex: 1;
    justify-content: center;
    padding: 0.8rem;
    font-size: 0.95rem;
}

/* Achievements */
.achievements {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.achievement-item {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 20px;
    margin: 2rem 0;
    box-shadow: var(--shadow);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s forwards;
}

.achievement-item h3 {
    font-family: 'Playfair Display', serif;
    color: var(--accent);
    margin-bottom: 1rem;
}

.achievement-item p {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* Footer */
footer {
    background: var(--bg-secondary);
    padding: 4rem 5% 2rem;
    text-align: center;
    border-top: 1px solid var(--border);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.social-link {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.social-link:hover {
    background: var(--accent);
    color: white;
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.footer-text {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero {
        text-align: center;
        padding: 0 5%;
    }

    .cta-buttons {
        justify-content: center;
    }

    section {
        padding: 80px 5%;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .project-links {
        flex-direction: column;
    }
}

/* Scroll Animations */
.fade-in {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}