/* ====== Design Tokens ====== */
:root {
    --bg-body: #0d0d0f;
    --bg-card: #141419;
    --bg-card-hover: #1a1a21;
    --border: #1f1f28;
    --border-hover: #04d36155;
    --text-primary: #f0f0f5;
    --text-secondary: #a8a8b3;
    --text-muted: #7c7c8a;
    --accent: #04d361;
    --accent-glow: rgba(4, 211, 97, 0.25);
    --accent-hover: #00b34d;
    --font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-full: 50%;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ====== Layout ====== */
.container {
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    padding: 80px 24px 40px;
    flex: 1;
}

/* ====== Hero Section ====== */
.hero {
    text-align: center;
    padding: 20px 0 40px;
}

.avatar {
    width: 96px;
    height: 96px;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: var(--bg-body);
    border-radius: var(--radius-full);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 38px;
    margin-bottom: 24px;
    box-shadow: 0 0 40px var(--accent-glow);
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.subtitle {
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1.5px;
    margin-bottom: 16px;
}

.bio {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 520px;
    margin: 0 auto 28px;
    line-height: 1.7;
}

.social-links {
    display: inline-flex;
    gap: 16px;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 1.2rem;
    text-decoration: none;
    transition: color var(--transition-base), border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.social-link:hover {
    color: var(--text-primary);
    border-color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow);
    transform: translateY(-2px);
}

/* ====== Divider ====== */
.divider {
    border: 0;
    height: 1px;
    background: var(--border);
    margin: 20px 0 48px;
}

/* ====== Projects Section ====== */
.projects h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 24px;
    letter-spacing: -0.01em;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex;
    gap: 16px;
    align-items: flex-start;
    transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
    position: relative;
    overflow: hidden;
}

/* Soft radial glow on hover */
.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at top right, var(--accent-glow), transparent 60%);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), 0 0 30px var(--accent-glow);
}

.project-card:hover::before {
    opacity: 0.15;
}

.project-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: var(--bg-body);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    box-shadow: 0 4px 12px rgba(4, 211, 97, 0.2);
    overflow: hidden;
}

.project-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.project-info {
    flex: 1;
    min-width: 0;
}

.project-info h3 {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 6px;
    letter-spacing: -0.01em;
}

.project-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.project-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* ====== Buttons ====== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    font-family: var(--font-family);
    text-decoration: none;
    transition: all var(--transition-base);
    border: 1px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-body);
    box-shadow: 0 2px 10px var(--accent-glow);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

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

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent);
    transform: translateY(-1px);
}

/* ====== Footer ====== */
.site-footer {
    padding: 40px 24px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
}

/* ====== Scroll Animations ====== */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
    will-change: opacity, transform;
}

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

/* Stagger delays for grid children */
.projects-grid .fade-up:nth-child(1) { transition-delay: 0.05s; }
.projects-grid .fade-up:nth-child(2) { transition-delay: 0.15s; }
.projects-grid .fade-up:nth-child(3) { transition-delay: 0.25s; }
.projects-grid .fade-up:nth-child(4) { transition-delay: 0.35s; }

/* ====== Responsive ====== */
@media (max-width: 640px) {
    .container {
        padding: 60px 20px 24px;
    }

    .hero h1 {
        font-size: 2rem;
    }

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