/* --- Variables & Reset --- */
:root {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent-primary: #6366f1; /* Indigo */
    --accent-secondary: #06b6d4; /* Cyan */
    --accent-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    --border-color: #e2e8f0;
    --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.01);
    --card-shadow-hover: 0 20px 40px -15px rgba(99, 102, 241, 0.15);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

/* --- Layout Containers --- */
.section-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 80px 24px;
}

/* --- Navigation Header --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(248, 250, 252, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    z-index: 1000;
    transition: var(--transition-smooth);
}

.header-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.5rem;
    text-decoration: none;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: var(--transition-smooth);
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link:hover::after {
    width: 100%;
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
    position: relative;
    overflow: hidden;
}

/* Background blob decoration */
.hero::before {
    content: '';
    position: absolute;
    top: -10%;
    right: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, rgba(6, 182, 212, 0.02) 70%, transparent 100%);
    border-radius: 50%;
    z-index: -1;
}

.hero-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: center;
    width: 100%;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    background-color: rgba(99, 102, 241, 0.08);
    color: var(--accent-primary);
    border-radius: 9999px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
    font-family: var(--font-heading);
    letter-spacing: 0.5px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -1.5px;
}

.highlight {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.btn-primary {
    background: var(--accent-gradient);
    color: #ffffff;
    box-shadow: 0 10px 20px -5px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 25px -5px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: #f1f5f9;
    transform: translateY(-2px);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.avatar-container {
    width: 280px;
    height: 280px;
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    background: var(--accent-gradient);
    padding: 6px;
    animation: blob-animate 8s ease-in-out infinite alternate;
    box-shadow: 0 20px 40px -10px rgba(99, 102, 241, 0.25);
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    background-color: var(--bg-secondary);
    border-radius: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 5rem;
    font-weight: 800;
    color: var(--accent-primary);
}

@keyframes blob-animate {
    0% {
        border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    }
    100% {
        border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%;
    }
}

/* --- Section Heading --- */
.section-title {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.8px;
    margin-bottom: 48px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 40px;
    height: 4px;
    background: var(--accent-gradient);
    border-radius: 2px;
}

/* --- About Section --- */
.about {
    background-color: var(--bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 64px;
}

.about-text h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1.05rem;
}

.about-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.info-card {
    background-color: var(--bg-primary);
    padding: 20px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.info-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent-primary);
    margin-bottom: 6px;
}

.info-value {
    font-weight: 600;
    font-size: 1.05rem;
}

/* --- Skills Section --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.skill-card {
    background-color: var(--bg-secondary);
    padding: 40px 32px;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
    transition: var(--transition-smooth);
}

.skill-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--card-shadow-hover);
    border-color: rgba(99, 102, 241, 0.2);
}

.skill-icon {
    font-size: 2.5rem;
    margin-bottom: 24px;
}

.skill-card h3 {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.skill-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* --- Projects Section --- */
.projects {
    background-color: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 32px;
}

.project-card {
    background-color: var(--bg-primary);
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
    transition: var(--transition-smooth);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--card-shadow-hover);
    border-color: rgba(99, 102, 241, 0.2);
}

.project-image-placeholder {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(6, 182, 212, 0.05));
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.project-image-placeholder::before {
    content: '';
    position: absolute;
    width: 150%;
    height: 150%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    top: -50%;
    left: -50%;
    transform: rotate(45deg);
    transition: var(--transition-smooth);
}

.project-card:hover .project-image-placeholder::before {
    left: 120%;
    transition: all 0.8s ease-in-out;
}

.project-info {
    padding: 28px;
}

.project-info h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.project-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.project-tech {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
}

/* --- Contact Section --- */
.contact {
    text-align: center;
}

.contact-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: -24px auto 40px auto;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-smooth);
    border: 1px solid var(--border-color);
}

.contact-btn.email {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.contact-btn.email:hover {
    background-color: var(--text-primary);
    color: var(--bg-secondary);
    border-color: var(--text-primary);
    transform: translateY(-3px);
}

.contact-btn.github {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.contact-btn.github:hover {
    background-color: var(--text-primary);
    color: var(--bg-secondary);
    border-color: var(--text-primary);
    transform: translateY(-3px);
}

/* --- Footer --- */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 40px 24px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* --- Animation Utilities (JS required) --- */
.fade-in-element {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* --- Responsive Utilities --- */
@media (max-width: 968px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 48px;
        padding-top: 40px;
    }

    .hero-subtitle {
        margin: 0 auto 40px auto;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-visual {
        order: -1;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 640px) {
    .header-container {
        flex-direction: column;
        gap: 16px;
        padding: 16px;
    }

    .nav {
        gap: 20px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .avatar-container {
        width: 220px;
        height: 220px;
    }

    .section-container {
        padding: 60px 20px;
    }
}