/* ============================================================
   1. VARIABLES
   ============================================================ */
:root {
    --bg-primary:     #0a0f18; /* Darker navy */
    --bg-secondary:   #111827;
    --bg-card:        rgba(30, 41, 59, 0.5); /* Slightly visible slate card */
    --border-card:    rgba(148, 163, 184, 0.1);
    --accent:         #38bdf8; /* Soft cyan */
    --accent-hover:   #0ea5e9;
    --accent-2:       #818cf8; /* Soft indigo */
    --text-primary:   #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted:     #94a3b8;
    --radius-sm:      8px;
    --radius-md:      12px;
    --radius-lg:      16px;
    --transition:     0.3s ease;
    --container-max:  1180px;
}

/* ============================================================
   2. RESET / BASE
   ============================================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg-primary);
    background-image: radial-gradient(circle at 15% 50%, rgba(56, 189, 248, 0.03), transparent 25%),
                      radial-gradient(circle at 85% 30%, rgba(129, 140, 248, 0.03), transparent 25%);
    color: var(--text-secondary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

html, body {
    overflow-x: hidden;
}

img, svg, canvas {
    max-width: 100%;
}

.container {
    width: 90%;
    max-width: var(--container-max);
    margin: 0 auto;
    position: relative;
}

section {
    padding: 100px 0;
    position: relative;
}

/* ============================================================
   3. NAVBAR
   ============================================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 15, 24, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-card);
    padding: 16px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: 0.02em;
}

.logo-icon {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--bg-primary);
    background: var(--text-primary);
    padding: 4px 8px;
    border-radius: 4px;
    letter-spacing: 0;
}

.navbar {
    display: flex;
    gap: 8px;
    align-items: center;
}

.navbar a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color var(--transition), background var(--transition);
}

.navbar a i {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.navbar a:hover,
.navbar a.active {
    color: var(--accent);
    background: rgba(56, 189, 248, 0.05);
}
.navbar a.active i {
    color: var(--accent);
}

/* Mobile toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-toggle.open span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   4. HERO (2 Column)
   ============================================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 120px;
    padding-bottom: 60px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.1;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 20px;
    line-height: 1.4;
}

.hero-description {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 32px;
    line-height: 1.7;
}

.hero-badges {
    display: flex;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.badge {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-card);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 500;
}

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

.btn-primary,
.btn-secondary {
    padding: 12px 28px;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition);
}

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

.btn-primary:hover {
    background: var(--text-secondary);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: var(--bg-card);
    border-color: var(--text-muted);
    transform: translateY(-2px);
}

/* Developer Card (Right Column) */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
}

.developer-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 440px;
    overflow: hidden;
    backdrop-filter: blur(10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.dev-card-header {
    background: rgba(0, 0, 0, 0.2);
    padding: 12px 20px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-card);
}

.mac-dots {
    display: flex;
    gap: 6px;
    margin-right: 16px;
}

.mac-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.mac-dots span:nth-child(1) { background: #ff5f56; }
.mac-dots span:nth-child(2) { background: #ffbd2e; }
.mac-dots span:nth-child(3) { background: #27c93f; }

.dev-card-header > span {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-family: monospace;
}

.dev-card-body {
    padding: 24px;
}

.focus-list {
    list-style: none;
    margin-bottom: 20px;
}

.focus-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.focus-list i {
    color: var(--accent);
    font-size: 1rem;
}

.code-box {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-sm);
    padding: 16px;
    overflow-x: auto;
}

.code-box pre {
    font-family: monospace;
    font-size: 0.9rem;
    margin: 0;
}

.code-box .keyword { color: #ff7b72; }
.code-box .variable { color: #79c0ff; }
.code-box .string { color: #a5d6ff; }

/* ============================================================
   5. SECTION HEADER (shared)
   ============================================================ */
.section-header {
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.section-line {
    width: 40px;
    height: 4px;
    background: var(--accent);
    border-radius: 2px;
}

/* ============================================================
   6. ABOUT
   ============================================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.about-text p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.skills-wrapper {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    padding: 24px;
    border-radius: var(--radius-md);
}

.skill-card h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.skill-items {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-tag {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-card);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* ============================================================
   7. EXPERIENCE & EDUCATION
   ============================================================ */
.exp-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.exp-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 32px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    transition: transform var(--transition), border-color var(--transition);
}

.exp-card:hover {
    transform: translateY(-4px);
    border-color: rgba(148, 163, 184, 0.3);
}

.exp-icon {
    width: 48px;
    height: 48px;
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.2);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--accent);
    flex-shrink: 0;
}

.exp-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.exp-company {
    display: inline-block;
    font-size: 0.95rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 12px;
}

.exp-content p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ============================================================
   8. PROJECTS
   ============================================================ */
.projects-intro p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 40px;
    line-height: 1.6;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

/* Rendered by main.js */
.project-item,
.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    gap: 12px;
    height: 100%;
}

.project-item:hover,
.project-card:hover {
    transform: translateY(-4px);
    border-color: rgba(148, 163, 184, 0.3);
}

.project-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.project-description {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
    flex-grow: 1;
}

.project-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: auto;
}

.lang-badge {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-card);
    padding: 2px 10px;
    border-radius: 999px;
}

.star-count {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.project-updated {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.project-link {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 8px;
    transition: color var(--transition);
}

.project-link:hover {
    color: var(--accent);
}

/* Loading/Error */
.loading-spinner {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 0;
    color: var(--text-muted);
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-card);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 16px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============================================================
   9. CONTACT
   ============================================================ */
.contact-intro p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 40px;
    line-height: 1.6;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 24px;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: all var(--transition);
}

.contact-card:hover {
    transform: translateY(-4px);
    border-color: rgba(148, 163, 184, 0.3);
}

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: #fff;
}

.contact-icon.linkedin { background: #0077b5; }
.contact-icon.email    { background: #ea4335; }
.contact-icon.github   { background: #24292e; }

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.contact-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.contact-value {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* ============================================================
   10. FOOTER
   ============================================================ */
.footer {
    border-top: 1px solid var(--border-card);
    padding: 40px 0;
    margin-top: 60px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-text p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 36px;
    height: 36px;
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition);
}

.footer-social a:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
}

/* ============================================================
   11. ANIMATIONS
   ============================================================ */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible,
.slide-in-left.visible,
.slide-in-right.visible {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    .fade-in, .slide-in-left, .slide-in-right {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* ============================================================
   12. RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
    .hero-grid,
    .about-grid,
    .exp-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-visual {
        justify-content: flex-start;
    }
}

@media (max-width: 768px) {
    .navbar {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }
    
    .navbar.open {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        border-bottom: 1px solid var(--border-card);
        padding: 16px 5%;
        gap: 8px;
    }
    
    .navbar.open a {
        width: 100%;
        padding: 12px;
    }

    section {
        padding: 80px 0;
    }

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

    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.2rem;
    }
    
    .exp-card {
        flex-direction: column;
        gap: 16px;
        padding: 24px;
    }
}