/* Variables & Setup - Premium Light Theme Default */
/* Variables & Setup - Premium Light Theme */
:root {
    --bg-color: #FFFFFF;
    --surface-color: #F8FAFC;
    --border-color: #E5E7EB;
    --text-primary: #111827;
    --text-secondary: #4B5563;
    --accent: #2563EB;
    --gradient: linear-gradient(135deg, #2563EB, #7C3AED);
    
    /* Premium Effects */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --shadow-soft: 0 10px 30px -10px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 20px 40px -10px rgba(37, 99, 235, 0.15);
    
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --spacing-sm: clamp(1rem, 2vw, 1.5rem);
    --spacing-md: clamp(2rem, 5vw, 4rem);
    --spacing-lg: clamp(4rem, 10vw, 8rem);
    --spacing-xl: clamp(6rem, 15vw, 12rem);
}

/* Dark Theme Overrides */
[data-theme="dark"] {
    --bg-color: #050505;
    --surface-color: #0D0D0D;
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #FFFFFF;
    --text-secondary: #A1A1AA;
    --accent: #00F5D4;
    --gradient: linear-gradient(135deg, #00F5D4, #7C3AED);
    --glass-bg: rgba(255, 255, 255, 0.03);
    --shadow-soft: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    cursor: none; 
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    width: 100%;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 5%;
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.section-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    margin-bottom: var(--spacing-md);
}

.body-text {
    color: var(--text-secondary);
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    line-height: 1.7;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
    padding: 1rem 2rem;
    border-radius: 100px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: none;
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--gradient);
    color: #FFFFFF;
    box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px -5px rgba(37, 99, 235, 0.4);
}

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

.btn-secondary:hover {
    border-color: var(--text-primary);
    background: var(--bg-color);
    box-shadow: var(--shadow-soft);
}

/* Glassmorphism Common */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 2.5rem;
    box-shadow: var(--shadow-soft);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s ease, box-shadow 0.4s ease;
}

.glass:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: var(--shadow-hover);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 0;
    z-index: 100;
    transition: background 0.3s ease, backdrop-filter 0.3s ease, padding 0.3s ease;
}

.navbar.scrolled {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 5%;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.05em;
}

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

#theme-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: none;
    transition: all 0.3s ease;
}

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

[data-theme="light"] .sun-icon { display: none; }
[data-theme="dark"] .moon-icon { display: none; }

.hamburger {
    display: none;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--spacing-xl);
    position: relative;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
}

@media (min-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.hero-subtitle {
    color: var(--accent);
    font-family: var(--font-heading);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.hero-title {
    font-size: clamp(3.5rem, 8vw, 7rem);
    margin-bottom: 2rem;
    background: var(--text-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    color: var(--text-secondary);
    font-size: clamp(1.125rem, 1.5vw, 1.25rem);
    max-width: 600px;
    margin-bottom: 3rem;
    line-height: 1.6;
}

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


.social-icons {
    display: flex;
    gap: 1.5rem;
}

.social-icons a {
    color: var(--text-secondary);
    transition: color 0.3s ease, transform 0.3s ease;
}

.social-icons a:hover {
    color: var(--accent);
    transform: translateY(-3px);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-secondary);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); }
    40% { transform: translateY(-15px) translateX(-50%); }
    60% { transform: translateY(-7px) translateX(-50%); }
}

/* Split Layout (About) */
.about {
    padding: var(--spacing-xl) 0;
}

.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.personal-info ul {
    list-style: none;
}
.personal-info li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}
.personal-info i {
    color: var(--accent);
    width: 18px;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.stat-number {
    font-size: 3rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.about-image {
    width: 100%;
    height: 600px;
    border-radius: 32px;
    background: var(--surface-color);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.glass-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, rgba(37,99,235,0.1), transparent);
}

/* Skills Section */
.skills {
    padding: var(--spacing-xl) 0;
}
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}
.skill-category h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}
.skill-category i { color: var(--accent); }
.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}
.skill-list span {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    padding: 0.4rem 1rem;
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}
.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--border-color);
    border-radius: 10px;
    overflow: hidden;
}
.progress {
    height: 100%;
    background: var(--gradient);
    border-radius: 10px;
}

/* Bento Grid (Projects) */
.projects {
    padding: var(--spacing-xl) 0;
}
.projects-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: 1rem;
}
.project-filters {
    display: flex;
    gap: 0.5rem;
}
.filter-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 1.5rem;
    border-radius: 100px;
    cursor: none;
    transition: all 0.3s;
}
.filter-btn.active, .filter-btn:hover {
    background: var(--text-primary);
    color: var(--bg-color);
    border-color: var(--text-primary);
}

.bento-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 400px;
    gap: 1.5rem;
}

.project-card {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    cursor: none;
    group: hover;
}

.project-card.large {
    grid-column: span 2;
    grid-row: span 2;
}

.project-img {
    width: 100%;
    height: 100%;
    background: var(--surface-color); 
    background-image: linear-gradient(120deg, rgba(37,99,235,0.05) 0%, rgba(124,58,237,0.05) 100%);
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.project-card:hover .project-img {
    transform: scale(1.05);
}

.project-info {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 2.5rem;
    background: linear-gradient(to top, var(--bg-color), transparent);
    transform: translateY(10px);
    opacity: 0.9;
    transition: all 0.4s ease;
}

.project-card:hover .project-info {
    transform: translateY(0);
    opacity: 1;
}

.project-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
    font-weight: 500;
}
.project-info h3 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}
.tech-stack {
    display: flex;
    gap: 0.5rem;
    margin: 1rem 0;
}
.tech-stack span {
    font-size: 0.75rem;
    padding: 0.2rem 0.8rem;
    border-radius: 100px;
    border: 1px solid var(--border-color);
    background: var(--glass-bg);
}
.project-links {
    display: flex;
    gap: 1rem;
}
.icon-link {
    background: var(--bg-color);
    color: var(--text-primary);
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
}

/* Certificates */
.certificates { padding: var(--spacing-xl) 0; }
.cert-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}
.cert-icon {
    width: 50px; height: 50px;
    background: var(--surface-color);
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    color: var(--accent);
    margin-bottom: 1.5rem;
}
.cert-card h3 { margin-bottom: 0.5rem; font-size: 1.25rem; }
.cert-card .org { color: var(--text-secondary); font-weight: 500; }
.cert-card .date { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 1.5rem; }
.verify-link {
    display: inline-flex; align-items: center; gap: 0.5rem;
    color: var(--accent); text-decoration: none; font-weight: 500;
}

/* Resume Timeline */
.resume { padding: var(--spacing-xl) 0; }
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 24px;
    top: 0;
    height: 100%;
    width: 2px;
    background: var(--border-color);
}
.timeline-item {
    position: relative;
    padding-left: 4rem;
    margin-bottom: 2rem;
    padding-top: 2rem; padding-bottom: 2rem;
}
.timeline-dot {
    position: absolute;
    left: 17px;
    top: 2.5rem;
    width: 16px;
    height: 16px;
    background: var(--accent);
    border-radius: 50%;
    border: 4px solid var(--bg-color);
    box-shadow: 0 0 0 2px var(--border-color);
}
.timeline-date {
    display: inline-block;
    padding: 0.3rem 1rem;
    background: var(--surface-color);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 1rem;
    font-weight: 500;
}
.timeline-content h3 { margin-bottom: 0.25rem; }
.timeline-content h4 { color: var(--text-secondary); font-weight: 400; margin-bottom: 1rem; }

/* Contact Section */
.contact { padding: var(--spacing-xl) 0; }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--spacing-lg);
}
.contact-cards {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.contact-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem;
}
.contact-card i {
    width: 48px; height: 48px;
    background: var(--surface-color);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: var(--accent);
}

.input-group {
    margin-bottom: 1.5rem;
}
.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}
input, textarea {
    width: 100%;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 1.25rem;
    border-radius: 12px;
    color: var(--text-primary);
    font-family: var(--font-body);
    transition: all 0.3s ease;
}
input:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--bg-color);
    box-shadow: 0 0 0 4px rgba(37,99,235,0.1);
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
    background: var(--surface-color);
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}
.footer-brand p {
    color: var(--text-secondary);
    margin-top: 1rem;
    max-width: 300px;
}
.footer-links h3, .footer-socials h3 {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}
.footer-links a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 0.75rem;
    transition: color 0.3s;
}
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}
.back-to-top {
    width: 40px; height: 40px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: var(--text-primary);
}
.back-to-top {
    transition: all 0.3s;
    cursor: none;
}

.back-to-top:hover {
    background: var(--accent);
    color: #FFFFFF;
}

/* ==========================================================================
   LIQUID GLASS REVEAL EFFECT (HERO)
   ========================================================================== */

.hero-image-reveal-container {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 450px; 
    background: transparent;
    user-select: none;
    --reveal-x: 50%;
    --reveal-y: 50%;
    --reveal-radius: 0px;
}

@media (min-width: 992px) {
    .hero-image-reveal-container {
        min-height: 600px; 
    }
}

.reveal-layer {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.base-layer {
    z-index: 1;
}

.mask-layer {
    z-index: 2;
    mask-image: radial-gradient(circle var(--reveal-radius) at var(--reveal-x) var(--reveal-y), black 0%, rgba(0,0,0,0.8) 40%, transparent 100%);
    -webkit-mask-image: radial-gradient(circle var(--reveal-radius) at var(--reveal-x) var(--reveal-y), black 0%, rgba(0,0,0,0.8) 40%, transparent 100%);
    
    /* Strict sizing locks the mask coordinate system to the container */
    mask-repeat: no-repeat;
    -webkit-mask-repeat: no-repeat;
    mask-size: 100% 100%;
    -webkit-mask-size: 100% 100%;
    mask-position: 0 0;
    -webkit-mask-position: 0 0;
}

.reveal-layer img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center bottom;
    position: absolute;
    inset: 0;
}

.desktop-img { display: block; }
.mobile-img { display: none; }

@media (max-width: 768px) {
    .desktop-img { display: none; }
    .mobile-img { display: block; }
}