/* ==========================================================================
   Antigravity Portfolio Design System - CSS Styles
   ========================================================================== */

/* --- Root & Theme Variables --- */
:root {
    /* Color Tokens (Dark Glass Theme Default) */
    --bg-primary: #090d16;
    --bg-secondary: #0f172a;
    --bg-surface: #1e293b;
    
    --glass-bg: rgba(15, 23, 42, 0.65);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --accent-cyan: #06b6d4;
    --accent-purple: #8b5cf6;
    --accent-blue: #3b82f6;
    --accent-amber: #f59e0b;
    --accent-pink: #ec4899;

    --gradient-primary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 50%, #8b5cf6 100%);
    --gradient-glow: linear-gradient(135deg, rgba(6, 182, 212, 0.4) 0%, rgba(139, 92, 246, 0.4) 100%);
    
    --font-heading: 'Space Grotesk', -apple-system, sans-serif;
    --font-body: 'Plus Jakarta Sans', -apple-system, sans-serif;

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;

    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-surface: #ffffff;

    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(0, 0, 0, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* Background Canvas */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
}

/* --- Layout Utility Classes --- */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.section {
    padding: 6rem 0;
    position: relative;
}

.bg-surface {
    background-color: rgba(15, 23, 42, 0.3);
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
}

.glass-panel:hover {
    border-color: rgba(6, 182, 212, 0.3);
}

/* Typography & Accent Text */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    line-height: 1.2;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.text-accent { color: var(--accent-cyan); }
.text-cyan { color: var(--accent-cyan); }
.text-purple { color: var(--accent-purple); }
.text-amber { color: var(--accent-amber); }

/* --- Section Headers --- */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    font-family: var(--font-heading);
    color: var(--accent-cyan);
    font-size: 0.9rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    display: inline-block;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-description {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.8rem 1.8rem;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition-normal);
}

.btn-primary {
    background: var(--gradient-primary);
    color: #ffffff;
    box-shadow: 0 4px 20px rgba(6, 182, 212, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(6, 182, 212, 0.5);
}

.btn-outline {
    background: transparent;
    border-color: var(--glass-border);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--accent-cyan);
    background: rgba(6, 182, 212, 0.1);
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.btn-sm {
    padding: 0.5rem 1.2rem;
    font-size: 0.875rem;
}

.btn-full {
    width: 100%;
}

.glow-effect {
    position: relative;
    overflow: hidden;
}

/* --- Navbar --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.2rem 0;
    transition: var(--transition-normal);
}

.navbar.scrolled {
    padding: 0.8rem 0;
    background: rgba(9, 13, 22, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--text-primary);
    display: flex;
    align-items: center;
}

.logo-bracket { color: var(--accent-cyan); }
.logo-slash { color: var(--accent-purple); }
.logo-text { margin: 0 2px; }

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

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

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.theme-toggle:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* --- Hero Section --- */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 6rem;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.4rem 1rem;
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    color: var(--accent-cyan);
    margin-bottom: 1.5rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent-cyan);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-cyan);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.dynamic-type {
    color: var(--accent-cyan);
    border-right: 3px solid var(--accent-cyan);
    animation: blinkCursor 0.8s infinite;
}

@keyframes blinkCursor {
    0%, 100% { border-color: transparent; }
    50% { border-color: var(--accent-cyan); }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3rem;
}

.social-links {
    display: flex;
    gap: 1.2rem;
}

.social-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    text-decoration: none;
    transition: var(--transition-normal);
}

.social-icon:hover {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    transform: translateY(-4px);
    box-shadow: 0 6px 16px rgba(6, 182, 212, 0.3);
}

/* Avatar Card */
.hero-visual {
    display: flex;
    justify-content: center;
}

.avatar-card {
    padding: 2.5rem;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.avatar-wrapper {
    width: 260px;
    height: 260px;
    border-radius: 50%;
    position: relative;
    padding: 8px;
    background: var(--gradient-primary);
}

.avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.orbit-ring {
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    border: 2px dashed rgba(6, 182, 212, 0.3);
    border-radius: 50%;
    animation: rotateRing 20s linear infinite;
}

.ring-2 {
    top: -40px;
    left: -40px;
    right: -40px;
    bottom: -40px;
    border-color: rgba(139, 92, 246, 0.2);
    animation-duration: 35s;
    animation-direction: reverse;
}

@keyframes rotateRing {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.floating-badge {
    position: absolute;
    padding: 0.6rem 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge-top-right {
    top: 20px;
    right: -20px;
}

.badge-bottom-left {
    bottom: 20px;
    left: -20px;
}

/* --- Stats Section --- */
.stats-section {
    padding: 3rem 0;
    margin-bottom: 4rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.stat-card {
    padding: 2rem 1.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-primary);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    display: inline-block;
}

.stat-plus {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-cyan);
    display: inline-block;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 0.5rem;
}

/* --- About Section --- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.about-bio {
    padding: 2.5rem;
}

.about-bio h3 {
    font-size: 1.8rem;
    margin-bottom: 1.2rem;
}

.about-bio p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.bio-highlights {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-weight: 500;
}

.about-cards {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.feature-card {
    padding: 1.5rem;
    display: flex;
    gap: 1.2rem;
    align-items: flex-start;
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: rgba(6, 182, 212, 0.1);
    border-radius: var(--radius-sm);
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.feature-card h4 {
    font-size: 1.2rem;
    margin-bottom: 0.4rem;
}

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

/* --- Skills Section --- */
.skills-categories {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.skill-category {
    padding: 2rem;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--glass-border);
}

.category-icon {
    font-size: 1.8rem;
    color: var(--accent-cyan);
}

.category-header h3 {
    font-size: 1.3rem;
}

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

.skill-tag {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.skill-tag:hover {
    background: rgba(6, 182, 212, 0.15);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-2px);
}

/* --- Projects Section --- */
.project-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.6rem 1.4rem;
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    font-family: var(--font-heading);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.filter-btn:hover, .filter-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: #ffffff;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.project-card {
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.project-img-wrapper {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.demo-placeholder {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-graphic {
    font-size: 4rem;
    color: rgba(6, 182, 212, 0.3);
}

.project-card:hover .project-img {
    transform: scale(1.08);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(9, 13, 22, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-normal);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.project-tags {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.badge {
    font-size: 0.75rem;
    padding: 0.2rem 0.6rem;
    background: rgba(6, 182, 212, 0.15);
    color: var(--accent-cyan);
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.project-title {
    font-size: 1.3rem;
    margin-bottom: 0.6rem;
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    flex: 1;
}

.project-footer {
    display: flex;
    justify-content: space-between;
    padding-top: 1rem;
    border-top: 1px solid var(--glass-border);
}

.project-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

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

/* --- Experience Timeline --- */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20px;
    height: 100%;
    width: 2px;
    background: var(--glass-border);
}

.timeline-item {
    position: relative;
    padding: 1.8rem;
    margin-left: 50px;
    margin-bottom: 2rem;
}

.timeline-dot {
    position: absolute;
    left: -39px;
    top: 2rem;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-cyan);
    box-shadow: 0 0 12px var(--accent-cyan);
}

.timeline-date {
    font-size: 0.85rem;
    color: var(--accent-cyan);
    font-weight: 600;
    margin-bottom: 0.4rem;
}

.timeline-title {
    font-size: 1.3rem;
    margin-bottom: 0.2rem;
}

.timeline-subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 0.8rem;
}

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

/* --- Contact Section --- */
.contact-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.contact-card {
    padding: 1.2rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: rgba(6, 182, 212, 0.1);
    border-radius: 50%;
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.contact-card h4 {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.contact-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
}

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

.contact-form-container {
    padding: 2.5rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input, .form-group textarea {
    padding: 0.8rem 1rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition-fast);
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 10px rgba(6, 182, 212, 0.2);
}

/* --- Footer --- */
.footer {
    padding: 3rem 0;
    border-top: 1px solid var(--glass-border);
    background: rgba(9, 13, 22, 0.9);
}

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

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-cyan);
}

.back-to-top {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.back-to-top:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    transform: translateY(-3px);
}

/* --- Modal & Toast System --- */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.toast {
    padding: 1rem 1.5rem;
    background: var(--bg-surface);
    border: 1px solid var(--accent-cyan);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    gap: 0.8rem;
    animation: slideInRight 0.3s ease forwards;
}

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    z-index: 3000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    width: 90%;
    max-width: 650px;
    padding: 2.5rem;
    position: relative;
    max-height: 85vh;
    overflow-y: auto;
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
}

.modal-close:hover { color: var(--text-primary); }

/* --- Responsive Breakpoints --- */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-subtitle { margin: 0 auto 2.5rem auto; }
    .hero-buttons { justify-content: center; }
    .social-links { justify-content: center; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid { grid-template-columns: 1fr; }
    .skills-categories { grid-template-columns: 1fr; }
    .projects-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .hero-title { font-size: 2.5rem; }
    .projects-grid { grid-template-columns: 1fr; }
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--bg-primary);
        flex-direction: column;
        justify-content: center;
        transition: var(--transition-normal);
    }
    .nav-menu.active { left: 0; }
    .mobile-toggle { display: block; }
    .footer-container { flex-direction: column; gap: 1.5rem; text-align: center; }
}