/* ========== Reset & Base ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', sans-serif;
    background: #0a0a0a;
    color: #e5e5e5;
    line-height: 1.7;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
::selection { background: #0ea5e9; color: #fff; }

/* ========== NEW: Light Theme ========== */
[data-theme="light"] body {
    background: #f5f5f5;
    color: #171717;
}
[data-theme="light"] #nav {
    background: rgba(245, 245, 245, 0.85);
    border-bottom-color: rgba(0, 0, 0, 0.08);
}
[data-theme="light"] .logo { color: #0284c7; }
[data-theme="light"] .nav-links a { color: #525252; }
[data-theme="light"] .nav-links a:hover,
[data-theme="light"] .nav-links a.active { color: #0284c7; }
[data-theme="light"] .nav-links a.active::after { background: #0284c7; }
[data-theme="light"] #mobile-menu { background: rgba(245, 245, 245, 0.97); }
[data-theme="light"] #mobile-menu a { color: #525252; }
[data-theme="light"] h2 { color: #171717; }
[data-theme="light"] #hero h1 { color: #171717; }
[data-theme="light"] .hero-sub,
[data-theme="light"] #about > p,
[data-theme="light"] .about-list li { color: #404040; }
[data-theme="light"] .stats div { color: #525252; }
[data-theme="light"] .github-graph {
    background: rgba(0, 0, 0, 0.03);
    border-color: rgba(0, 0, 0, 0.08);
}
[data-theme="light"] .timeline-content {
    background: rgba(0, 0, 0, 0.02);
    border-color: rgba(0, 0, 0, 0.08);
}
[data-theme="light"] .timeline-item:hover .timeline-content { border-color: rgba(14, 165, 233, 0.4); }
[data-theme="light"] .timeline-marker {
    background: #f5f5f5;
}
[data-theme="light"] .timeline::before { background: rgba(0, 0, 0, 0.1); }
[data-theme="light"] .timeline-header h3 { color: #171717; }
[data-theme="light"] .timeline-company { color: #737373; }
[data-theme="light"] .timeline-desc,
[data-theme="light"] .timeline-desc li { color: #525252; }
[data-theme="light"] .tags span {
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(0, 0, 0, 0.1);
    color: #404040;
}
[data-theme="light"] .tags span:hover { border-color: #0284c7; color: #0284c7; }
[data-theme="light"] .project-card {
    background: rgba(0, 0, 0, 0.02);
    border-color: rgba(0, 0, 0, 0.08);
}
[data-theme="light"] .project-card h3 { color: #171717; }
[data-theme="light"] .project-card p { color: #737373; }
[data-theme="light"] .project-card:hover { border-color: #0284c7; }
[data-theme="light"] .cert-card {
    background: rgba(0, 0, 0, 0.02);
    border-color: rgba(0, 0, 0, 0.08);
}
[data-theme="light"] .cert-card strong { color: #171717; }
[data-theme="light"] .skill-bar-track { background: rgba(0, 0, 0, 0.07); }
[data-theme="light"] .skill-bar-label { color: #404040; }
[data-theme="light"] #contact p { color: #525252; }
[data-theme="light"] footer {
    border-top-color: rgba(0, 0, 0, 0.08);
    color: #737373;
}
[data-theme="light"] footer a { color: #737373; }
[data-theme="light"] .hero-desc { color: #525252; }
[data-theme="light"] .hero-links a { color: #525252; border-color: rgba(0,0,0,0.12); }
[data-theme="light"] .hero-links a:hover { border-color: #0284c7; color: #0284c7; }
[data-theme="light"] .skill-group h3 { color: #737373; }
[data-theme="light"] #back-to-top {
    background: rgba(0, 0, 0, 0.06);
    border-color: rgba(0, 0, 0, 0.12);
    color: #404040;
}
[data-theme="light"] .modal-content { background: #fff; border-color: rgba(0,0,0,0.1); }
[data-theme="light"] .modal-close { background: #f5f5f5; border-color: rgba(0,0,0,0.1); color: #404040; }
[data-theme="light"] .modal-header-actions { background: #fafafa; border-bottom-color: rgba(0,0,0,0.08); }
[data-theme="light"] .terminal { color: #0284c7; }
[data-theme="light"] #preloader { background: #f5f5f5; }

/* ========== 1. Preloader (Boot Sequence) ========== */
/* ========== 1. Preloader (Boot Sequence) ========== */
#preloader {
    position: fixed; inset: 0; z-index: 9999;
    background: #0a0a0a;
    display: flex; 
    align-items: center; 
    justify-content: center; 
    padding: 2rem; 
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

#preloader.hidden { 
    opacity: 0; 
    visibility: hidden; 
    pointer-events: none; 
}

/* The outer terminal window */
.terminal-window {
    width: 100%;
    max-width: 650px;
    background: #18181b; /* Deep terminal gray */
    border-radius: 10px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(255, 255, 255, 0.1);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* The top title bar */
.terminal-header {
    background: #27272a;
    padding: 0.6rem 1rem;
    display: flex;
    align-items: center;
    border-bottom: 1px solid #111;
}

/* Window control dots */
.terminal-buttons {
    display: flex;
    gap: 8px;
}
.terminal-buttons span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.terminal-buttons .close { background: #ef4444; }
.terminal-buttons .minimize { background: #eab308; }
.terminal-buttons .maximize { background: #22c55e; }

.terminal-title {
    flex-grow: 1;
    text-align: center;
    color: #a1a1aa;
    font-size: 0.85rem;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    margin-right: 44px; /* Offsets the buttons to keep title perfectly centered */
}

/* The actual text area */
.terminal-body {
    padding: 1.5rem;
    min-height: 320px;
    max-height: 60vh;
    overflow-y: auto;
    background: rgba(0, 0, 0, 0.4); 
}



/* The typing text */
#boot-text {
    margin: 0;
    font-family: 'Courier New', Courier, monospace;
    color: #0ea5e9;
    font-size: 0.95rem;
    line-height: 1.6;
    display: inline;
    text-shadow: 0 0 4px rgba(14, 165, 233, 0.3); /* Subtle terminal glow */
}

/* Blinking cursor */
.cursor-block {
    display: inline-block;
    width: 8px;
    height: 1.2em;
    background-color: #0ea5e9;
    vertical-align: middle;
    animation: blink 1s step-end infinite;
    margin-left: 4px;
    box-shadow: 0 0 6px rgba(14, 165, 233, 0.6);
}

@keyframes blink { 
    50% { opacity: 0; } 
}
/* ========== 2. Scroll Progress Bar ========== */
#scroll-progress {
    position: fixed; top: 0; left: 0; height: 3px; width: 0%;
    background: linear-gradient(90deg, #0ea5e9, #38bdf8);
    z-index: 101;
    transition: width 0.1s linear;
}

/* ========== Scroll Reveal Animation ========== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}
.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ========== Nav ========== */
#nav {
    position: fixed; top: 0; width: 100%; z-index: 100;
    display: flex; align-items: center; justify-content: space-between;
    padding: 1rem 2rem;
    background: rgba(10,10,10,0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.logo { font-family: 'Playfair Display', serif; font-size: 1.4rem; font-weight: 600; color: #0ea5e9; }
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a { font-size: 0.875rem; font-weight: 500; color: #a3a3a3; transition: color 0.3s; position: relative; }
.nav-links a:hover, .nav-links a.active { color: #0ea5e9; }
.nav-links a.active::after {
    content: ''; position: absolute; bottom: -5px; left: 0; width: 100%; height: 2px; background: #0ea5e9;
}

/* NEW: Nav actions group (theme toggle + hamburger) */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* NEW: Theme toggle button */
#theme-toggle {
    background: none;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    color: #a3a3a3;
    cursor: pointer;
    padding: 0.35rem 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}
#theme-toggle:hover {
    border-color: #0ea5e9;
    color: #0ea5e9;
}
[data-theme="light"] #theme-toggle {
    border-color: rgba(0,0,0,0.12);
    color: #525252;
}
[data-theme="light"] #theme-toggle:hover {
    border-color: #0284c7;
    color: #0284c7;
}

#menu-toggle {
    display: none; background: none; border: none;
    color: #e5e5e5; cursor: pointer;
}
[data-theme="light"] #menu-toggle { color: #171717; }

/* Mobile Menu */
#mobile-menu {
    display: none; position: fixed; inset: 0; z-index: 200;
    background: rgba(10,10,10,0.97); backdrop-filter: blur(20px);
    flex-direction: column; align-items: center; justify-content: center;
}
#mobile-menu.open { display: flex; }
#menu-close {
    position: absolute; top: 1.2rem; right: 2rem;
    background: none; border: none; color: #e5e5e5; cursor: pointer;
}
[data-theme="light"] #menu-close { color: #171717; }
#mobile-menu ul { list-style: none; text-align: center; }
#mobile-menu li { margin: 1.5rem 0; }
#mobile-menu a { font-size: 1.5rem; font-weight: 500; color: #a3a3a3; transition: color 0.3s; }
#mobile-menu a:hover { color: #0ea5e9; }

/* ========== Sections ========== */
main { padding-top: 80px; }
section {
    max-width: 720px; margin: 0 auto;
    padding: 6rem 2rem;
}
h2 {
    font-family: 'Playfair Display', serif;
    font-size: 2rem; font-weight: 600;
    margin-bottom: 1.5rem;
    color: #fff;
}
h2::after {
    content: ''; display: block;
    width: 32px; height: 3px; margin-top: 0.5rem;
    background: #0ea5e9; border-radius: 2px;
}

/* ========== Hero ========== */
#hero {
    min-height: calc(100vh - 80px); display: flex; flex-direction: column;
    justify-content: center; padding-top: 0;
}
.hero-greeting { font-size: 1rem; color: #0ea5e9; font-weight: 500; margin-bottom: 0.5rem; }
#hero h1 {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 600; color: #fff; line-height: 1.1; margin-bottom: 0.75rem;
}
.hero-sub { font-size: 1.25rem; color: #a3a3a3; margin-bottom: 1rem; min-height: 1.8em; }
.hero-desc { font-size: 0.95rem; color: #737373; max-width: 520px; margin-bottom: 2rem; }
.cursor { color: #0ea5e9; animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }
.hero-links { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.hero-links a {
    display: flex; align-items: center; gap: 0.4rem;
    padding: 0.5rem 1.1rem; border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px; font-size: 0.85rem; font-weight: 500;
    color: #a3a3a3; transition: all 0.3s;
}
.hero-links a:hover { border-color: #0ea5e9; color: #0ea5e9; }

/* ========== About ========== */
#about > p { color: #a3a3a3; font-size: 1rem; margin-bottom: 1.5rem; max-width: 600px; }
.about-list { list-style: none; margin-bottom: 2rem; }
.about-list li {
    display: flex; align-items: center; gap: 0.75rem;
    color: #a3a3a3; margin-bottom: 0.75rem; font-size: 1rem;
}
.about-list svg { flex-shrink: 0; color: #0ea5e9; }
.about-list strong { color: #e5e5e5; font-weight: 500; }
.stats { display: flex; gap: 3rem; margin-top: 0.5rem; }
.stats div { text-align: center; font-size: 0.85rem; color: #737373; }
.stats span { font-size: 1.75rem; font-weight: 700; color: #0ea5e9; }

.github-graph {
    margin-top: 2.5rem;
    padding: 1.5rem;
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: 12px;
}
.github-graph h3 {
    font-size: 0.8rem; text-transform: uppercase; color: #525252;
    margin-bottom: 1rem; letter-spacing: 0.1em; font-family: 'Inter', sans-serif;
}
.github-graph img {
    width: 100%; border-radius: 8px; border: 1px solid rgba(255,255,255,0.05);
}

/* FIX: github-cards-container now inside #about, so it gets proper context */
.github-cards-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
}
.github-cards-container img {
    height: 180px;
    max-width: 100%;
    object-fit: contain;
}

/* ========== Experience Timeline ========== */
.timeline {
    position: relative;
    padding-left: 2rem;
    margin-top: 1rem;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 2px;
}
.timeline-item {
    position: relative;
    margin-bottom: 2.5rem;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-marker {
    position: absolute;
    left: -2rem;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #0a0a0a;
    border: 2px solid #0ea5e9;
    transform: translateX(-5px);
    z-index: 1;
    transition: background 0.3s;
}
[data-theme="light"] .timeline-marker { background: #f5f5f5; }
.timeline-item:hover .timeline-marker {
    background: #0ea5e9;
    box-shadow: 0 0 10px rgba(14, 165, 233, 0.5);
}
.timeline-content {
    padding: 1.25rem 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.02);
    transition: border-color 0.3s, transform 0.3s;
}
.timeline-item:hover .timeline-content {
    border-color: rgba(14, 165, 233, 0.3);
    transform: translateX(4px);
}
.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}
.timeline-header h3 { font-size: 1.05rem; font-weight: 600; color: #fff; }
.timeline-date { font-size: 0.8rem; font-weight: 500; color: #0ea5e9; white-space: nowrap; }
.timeline-company { font-size: 0.875rem; color: #737373; margin-bottom: 0.75rem; }
.timeline-desc { font-size: 0.9rem; color: #a3a3a3; margin-bottom: 0.75rem; line-height: 1.6; }
.timeline-desc ul { padding-left: 1.2rem; margin: 0.5rem 0; }
.timeline-desc li { margin-bottom: 0.5rem; color: #a3a3a3; }
.timeline-desc li::marker { color: #0ea5e9; }

/* ========== Skills ========== */
.skills-grid { display: flex; flex-direction: column; gap: 2rem; }
.skill-group h3 { font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: #525252; margin-bottom: 0.75rem; }
.tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tags span {
    padding: 0.4rem 0.9rem; border-radius: 6px; font-size: 0.85rem;
    background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.06);
    color: #d4d4d4; transition: all 0.3s;
}
.tags span:hover { border-color: #0ea5e9; color: #0ea5e9; }
.tags.small span { font-size: 0.75rem; padding: 0.25rem 0.6rem; }

/* NEW: Skill proficiency bars */
.skill-bars { display: flex; flex-direction: column; gap: 0.9rem; }
.skill-bar-item {}
.skill-bar-label {
    display: flex; justify-content: space-between;
    font-size: 0.85rem; color: #a3a3a3; margin-bottom: 0.3rem;
}
.skill-pct { color: #0ea5e9; font-weight: 500; }
.skill-bar-track {
    background: rgba(255,255,255,0.05);
    border-radius: 99px; height: 6px; overflow: hidden;
}
.skill-bar-fill {
    height: 100%; width: 0%;
    background: linear-gradient(90deg, #0ea5e9, #38bdf8);
    border-radius: 99px;
    transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== Projects (with 3D Tilt setup) ========== */
.projects-grid { display: flex; flex-direction: column; gap: 1rem; }
.project-card {
    display: block; padding: 1.5rem;
    border: 1px solid rgba(255,255,255,0.06); border-radius: 12px;
    background: rgba(255,255,255,0.02);
    transition: transform 0.1s ease, border-color 0.3s;
    transform-style: preserve-3d;
}
.project-card:hover { border-color: #0ea5e9; }
.project-card h3 {
    font-size: 1.1rem; font-weight: 600; color: #fff;
    margin-bottom: 0.4rem; display: flex; justify-content: space-between; align-items: center;
}
.project-card h3 span { color: #525252; transition: color 0.3s; }
.project-card:hover h3 span { color: #0ea5e9; }
.project-card p { font-size: 0.9rem; color: #737373; margin-bottom: 0.75rem; }
.view-all {
    display: inline-block; margin-top: 1.5rem;
    font-size: 0.875rem; font-weight: 500; color: #0ea5e9;
    transition: opacity 0.3s;
}
.view-all:hover { opacity: 0.7; }

/* ========== NEW: Certifications ========== */
.certs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}
.cert-card {
    display: flex; align-items: center; gap: 1rem;
    padding: 1rem 1.25rem;
    border: 1px solid rgba(255,255,255,0.06); border-radius: 12px;
    background: rgba(255,255,255,0.02);
    transition: border-color 0.3s, transform 0.3s;
}
.cert-card:hover {
    border-color: rgba(14, 165, 233, 0.3);
    transform: translateY(-2px);
}
.cert-icon { font-size: 1.5rem; flex-shrink: 0; }
.cert-card strong { font-size: 0.9rem; color: #e5e5e5; display: block; margin-bottom: 0.2rem; }
.cert-card p { font-size: 0.8rem; color: #525252; margin: 0; }

/* ========== Contact ========== */
#contact p { color: #a3a3a3; margin-bottom: 1.5rem; }

/* FIX: contact links wrapper for proper spacing */
.contact-links { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.contact-btn {
    display: inline-block; padding: 0.65rem 1.5rem;
    background: #0ea5e9; color: #fff; border-radius: 8px;
    font-size: 0.9rem; font-weight: 600; transition: background 0.3s;
}
.contact-btn:hover { background: #0284c7; }

/* FIX: .secondary variant moved from inline styles to CSS */
.contact-btn.secondary {
    background: transparent;
    border: 1px solid #0ea5e9;
    color: #0ea5e9;
}
.contact-btn.secondary:hover {
    background: rgba(14, 165, 233, 0.1);
}

/* ========== Footer ========== */
footer {
    text-align: center; padding: 2rem;
    border-top: 1px solid rgba(255,255,255,0.05);
    font-size: 0.8rem; color: #525252;
    display: flex; flex-direction: column; gap: 0.5rem;
    align-items: center;
}
footer a { color: #525252; transition: color 0.3s; }
footer a:hover { color: #0ea5e9; }

/* ========== Floating Buttons ========== */
#resume-btn {
    position: fixed; bottom: 2rem; right: 2rem; z-index: 90;
    display: flex; align-items: center; gap: 0.5rem;
    padding: 0.7rem 1.25rem;
    background: #0ea5e9; color: #fff;
    border: none; border-radius: 50px; font-size: 0.85rem; font-weight: 600;
    box-shadow: 0 4px 20px rgba(14,165,233,0.35);
    transition: all 0.3s; cursor: pointer;
}
#resume-btn:hover {
    background: #0284c7;
    box-shadow: 0 6px 28px rgba(14,165,233,0.5);
    transform: translateY(-2px);
}

#back-to-top {
    position: fixed; bottom: 2rem; left: 2rem; z-index: 90;
    width: 45px; height: 45px; border-radius: 50%;
    background: rgba(255, 255, 255, 0.05); border: 1px solid rgba(255, 255, 255, 0.1);
    color: #e5e5e5; font-size: 1.2rem; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden; transition: all 0.3s ease;
}
#back-to-top.visible { opacity: 1; visibility: visible; }
#back-to-top:hover {
    background: #0ea5e9; border-color: #0ea5e9; color: #fff;
    transform: translateY(-3px);
}

/* ========== Resume Modal ========== */
.modal-overlay {
    position: fixed; inset: 0; z-index: 300;
    background: rgba(0,0,0,0.85); backdrop-filter: blur(8px);
    display: none; align-items: center; justify-content: center;
    padding: 2rem;
}
.modal-overlay.active { display: flex; }
.modal-content {
    background: #141414; border-radius: 12px; border: 1px solid rgba(255,255,255,0.08);
    width: 100%; max-width: 900px; height: 85vh;
    display: flex; flex-direction: column; position: relative;
    box-shadow: 0 25px 50px rgba(0,0,0,0.5);
}
.modal-close {
    position: absolute; top: -14px; right: -14px;
    width: 36px; height: 36px; border-radius: 50%;
    background: #0a0a0a; border: 1px solid rgba(255,255,255,0.1);
    color: #e5e5e5; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.3s; z-index: 10;
}
.modal-close:hover { background: #0ea5e9; border-color: #0ea5e9; }
.modal-header-actions {
    padding: 10px;
    text-align: center;
    background: #141414;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    border-radius: 12px 12px 0 0;
}
#resume-iframe {
    width: 100%; height: 100%; border: none; border-radius: 12px;
    background: #fff;
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
    .nav-links { display: none; }
    #menu-toggle { display: block; }
    .stats { gap: 2rem; }
    .stats span { font-size: 1.4rem; }
    #resume-btn { bottom: 1.2rem; right: 1.2rem; padding: 0.6rem 1rem; font-size: 0.8rem; }
    #back-to-top { bottom: 1.2rem; left: 1.2rem; width: 40px; height: 40px; font-size: 1rem; }
    section { padding: 4rem 1.5rem; }
    .modal-overlay { padding: 1rem; }
    .modal-content { height: 90vh; }
    .modal-close { top: -10px; right: -10px; }
    .timeline { padding-left: 1.5rem; }
    .timeline-marker { left: -1.5rem; }
    .timeline-header { flex-direction: column; gap: 0.15rem; }
    .timeline-content { padding: 1rem 1.25rem; }
    .certs-grid { grid-template-columns: 1fr; }
    .contact-links { flex-direction: column; }
    .contact-btn { text-align: center; }
}