/* ============================================
   NullDev Portfolio - Main Stylesheet
   Theme: Dark Cybersecurity Premium
   ============================================ */

/* --- CSS Variables / Theme --- */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #0d0d1a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-glass: rgba(255, 255, 255, 0.04);
    --bg-nav: rgba(10, 10, 15, 0.85);
    --text-primary: #e8e8f0;
    --text-secondary: #8888a0;
    --text-muted: #555570;
    --accent-cyan: #00d4ff;
    --accent-blue: #0a6cff;
    --accent-purple: #7c3aed;
    --accent-green: #10b981;
    --gradient-1: linear-gradient(135deg, #00d4ff, #0a6cff);
    --gradient-2: linear-gradient(135deg, #7c3aed, #00d4ff);
    --gradient-3: linear-gradient(135deg, #0a0a0f, #0d0d1a);
    --border-color: rgba(255, 255, 255, 0.06);
    --border-glow: rgba(0, 212, 255, 0.2);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --nav-height: 70px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: var(--accent-cyan);
    color: var(--bg-primary);
}

::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--accent-cyan);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: #00b8e6;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 120px 0;
    position: relative;
}

/* --- Section Headers --- */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.08);
    padding: 6px 16px;
    border-radius: 100px;
    border: 1px solid rgba(0, 212, 255, 0.15);
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.section-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.divider-line {
    width: 40px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
}

.divider-icon {
    color: var(--accent-cyan);
    font-size: 1rem;
    opacity: 0.8;
}

/* --- Loading Screen --- */
#loading-screen {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

#loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
}

.loader-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid transparent;
    animation: loader-spin 1.2s linear infinite;
}
.loader-ring:nth-child(1) {
    border-top-color: var(--accent-cyan);
    animation-delay: 0s;
}
.loader-ring:nth-child(2) {
    width: 70%;
    height: 70%;
    border-top-color: var(--accent-purple);
    animation-delay: 0.15s;
    animation-direction: reverse;
}
.loader-ring:nth-child(3) {
    width: 50%;
    height: 50%;
    border-top-color: var(--accent-green);
    animation-delay: 0.3s;
}

.loader-text {
    font-family: var(--font-display);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--accent-cyan);
    animation: pulse-text 1.5s ease-in-out infinite;
}

@keyframes loader-spin {
    to { transform: rotate(360deg); }
}
@keyframes pulse-text {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

/* --- Cursor Glow --- */
#cursor-glow {
    position: fixed;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.06) 0%, transparent 70%);
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease;
    mix-blend-mode: screen;
}

/* --- Scroll-Spy Dots --- */
#scroll-spy {
    position: fixed;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 8000;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.spy-link {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--text-muted);
    opacity: 0.3;
    transition: all var(--transition);
    position: relative;
}

.spy-link:hover,
.spy-link.active {
    opacity: 1;
    background: var(--accent-cyan);
    box-shadow: 0 0 8px rgba(0, 212, 255, 0.4);
    transform: scale(1.3);
}

.spy-link::after {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 1px solid transparent;
    transition: border-color var(--transition);
}

.spy-link.active::after {
    border-color: var(--accent-cyan);
}

/* --- Scroll Progress --- */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--gradient-1);
    z-index: 9999;
    transition: width 0.1s linear;
}

/* --- Navbar --- */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 9000;
    background: transparent;
    transition: all var(--transition);
}

#navbar.scrolled {
    background: var(--bg-nav);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 2px;
}

.logo-bracket {
    color: var(--accent-cyan);
    font-weight: 300;
    opacity: 0.6;
}

.logo-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition);
    position: relative;
    padding: 4px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: width var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}
.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-cta {
    background: var(--gradient-1);
    color: #fff !important;
    padding: 8px 20px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 0.8rem;
    transition: transform var(--transition), box-shadow var(--transition);
}
.nav-cta::after { display: none; }
.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 100;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition);
    transform-origin: center;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
}
.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero Section --- */
#hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--bg-primary);
}

#particle-canvas {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    z-index: 2;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(124, 58, 237, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(0, 108, 255, 0.06) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    max-width: 900px;
    padding: 0 24px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    padding: 8px 20px;
    border-radius: 100px;
    margin-bottom: 28px;
    backdrop-filter: blur(10px);
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #10b981;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5); }
    50% { opacity: 0.8; box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
}

.hero-title {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-size: clamp(1.1rem, 2.5vw, 1.6rem);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}

.hero-subtitle-top {
    color: var(--text-primary);
}

.hero-separator {
    color: var(--accent-cyan);
    opacity: 0.4;
    font-weight: 300;
}

.hero-subtitle {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.15;
    font-family: var(--font-display);
    margin-bottom: 28px;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-typing {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    min-height: 2rem;
}

.typing-label {
    font-weight: 400;
}

.typing-text {
    color: var(--accent-cyan);
    font-weight: 600;
}

.typing-cursor {
    color: var(--accent-cyan);
    animation: blink-cursor 0.8s step-end infinite;
    font-weight: 300;
    margin-left: 2px;
}

@keyframes blink-cursor {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.cta-primary, .cta-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all var(--transition);
}

.cta-primary {
    background: var(--gradient-1);
    color: #fff;
    box-shadow: 0 4px 25px rgba(0, 212, 255, 0.25);
}
.cta-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 35px rgba(0, 212, 255, 0.35);
}

.cta-secondary {
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
}
.cta-secondary:hover {
    border-color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.06);
    transform: translateY(-2px);
}

.hero-stats-mini {
    display: flex;
    justify-content: center;
    gap: 48px;
}

.hero-stat {
    text-align: center;
}

.hero-stat-num {
    display: block;
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
}

.hero-stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.7rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    animation: float-down 2s ease-in-out infinite;
}

.scroll-mouse {
    width: 24px;
    height: 38px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    position: relative;
}

.scroll-dot {
    width: 3px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll-dot 2s ease-in-out infinite;
}

@keyframes scroll-dot {
    0% { transform: translateX(-50%) translateY(0); opacity: 1; }
    100% { transform: translateX(-50%) translateY(16px); opacity: 0; }
}

@keyframes float-down {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(6px); }
}

/* --- About Section --- */
#about {
    background: var(--bg-secondary);
}

/* Profile Photo */
.profile-frame {
    position: relative;
    width: 160px;
    height: 160px;
    margin: 0 auto 24px;
}

.profile-glow {
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    background: var(--gradient-1);
    opacity: 0.3;
    filter: blur(12px);
    animation: profile-glow-pulse 3s ease-in-out infinite;
}

@keyframes profile-glow-pulse {
    0%, 100% { opacity: 0.2; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(1.05); }
}

.profile-image-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--border-glow);
    background: var(--bg-card);
}

.profile-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-3);
}

.profile-initials {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.profile-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 8px;
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #10b981;
    animation: pulse-dot 2s ease-in-out infinite;
}

.about-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.about-text {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.95rem;
    line-height: 1.8;
}

.about-text strong {
    color: var(--text-primary);
    font-weight: 600;
}

.about-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 32px;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 10px 16px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.highlight-item i {
    color: var(--accent-cyan);
    font-size: 0.9rem;
}

.highlight-item:hover {
    border-color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.04);
    transform: translateX(4px);
}

.about-card {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.about-card-glow {
    position: absolute;
    inset: 0;
    background: var(--gradient-1);
    opacity: 0.08;
    filter: blur(40px);
}

.about-card-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
    backdrop-filter: blur(10px);
}

.about-card-header {
    display: flex;
    gap: 8px;
    padding: 12px 16px;
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid var(--border-color);
}

.terminal-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.terminal-dot.red { background: #ef4444; }
.terminal-dot.yellow { background: #eab308; }
.terminal-dot.green { background: #22c55e; }

.about-card-body {
    padding: 20px 24px;
    font-family: 'Monaco', 'Cascadia Code', monospace;
    font-size: 0.82rem;
    line-height: 1.9;
}

.terminal-line {
    margin-bottom: 4px;
}

.prompt {
    color: #22c55e;
    margin-right: 8px;
}

.command {
    color: var(--text-primary);
}

.output {
    color: var(--text-muted);
}

.output .highlight {
    color: var(--accent-cyan);
}

.blink {
    animation: blink-cursor 1s step-end infinite;
}

/* --- Skills Section --- */
#skills {
    background: var(--bg-primary);
}

.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: all var(--transition);
}

.skill-category:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.skill-category-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.skill-category-header i {
    font-size: 1.2rem;
    color: var(--accent-cyan);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.08);
    border-radius: var(--radius-sm);
}

.skill-category-header h3 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
}

.skill-item {
    margin-bottom: 16px;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.82rem;
    margin-bottom: 6px;
}

.skill-info span:first-child {
    color: var(--text-secondary);
}

.skill-pct {
    color: var(--accent-cyan);
    font-weight: 600;
}

.skill-bar {
    height: 4px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 4px;
    overflow: hidden;
}

.skill-fill {
    height: 100%;
    width: 0;
    background: var(--gradient-1);
    border-radius: 4px;
    transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Services Section --- */
#services {
    background: var(--bg-primary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.service-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.08);
    border-radius: var(--radius-sm);
    font-size: 1.3rem;
    color: var(--accent-cyan);
    transition: all var(--transition);
}

.service-card:hover .service-icon {
    background: rgba(0, 212, 255, 0.15);
    transform: scale(1.1);
}

.service-card h3 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.service-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-cyan);
    transition: gap var(--transition);
}

.service-cta:hover {
    gap: 10px;
}

.service-cta i {
    font-size: 0.7rem;
}

/* --- Projects Section --- */
#projects {
    background: var(--bg-secondary);
}

/* Project Filters */
.project-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 24px;
    border-radius: 100px;
    font-family: var(--font-body);
    font-size: 0.82rem;
    font-weight: 500;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

.filter-btn:hover {
    border-color: var(--accent-cyan);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--gradient-1);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
    transition: opacity 0.3s ease;
}

.project-card.hidden {
    display: none;
}

.project-card.filtering {
    animation: card-fade-in 0.4s ease;
}

@keyframes card-fade-in {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.project-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 32px;
    transition: all var(--transition);
    overflow: hidden;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.project-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-1);
    opacity: 0;
    transition: opacity var(--transition);
}

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

.project-badge {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 100px;
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent-cyan);
    border: 1px solid rgba(0, 212, 255, 0.15);
    margin-bottom: 16px;
}

.project-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.project-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.06);
    border-radius: var(--radius-sm);
    font-size: 1.1rem;
    color: var(--accent-cyan);
}

.project-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
}

.project-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.tech-badge {
    font-size: 0.7rem;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 100px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    transition: all var(--transition);
}

.tech-badge:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.06);
}

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

.project-link {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
    transition: color var(--transition);
}

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

.project-link i {
    font-size: 0.9rem;
}

/* --- Experience Timeline --- */
#experience {
    background: var(--bg-primary);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-cyan), var(--accent-purple), transparent);
}

.timeline-item {
    position: relative;
    margin-bottom: 48px;
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.timeline-item.visible {
    opacity: 1;
    transform: translateX(0);
}

.timeline-dot {
    position: absolute;
    left: -33px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-cyan);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.2);
}

.timeline-date {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-cyan);
    margin-bottom: 8px;
    font-family: var(--font-display);
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 28px;
    backdrop-filter: blur(10px);
    transition: all var(--transition);
}

.timeline-content:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.timeline-content-inner h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.timeline-content-inner h4 {
    font-size: 0.85rem;
    color: var(--accent-cyan);
    font-weight: 500;
    margin-bottom: 12px;
}

.timeline-content-inner p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.timeline-tags span {
    font-size: 0.7rem;
    padding: 4px 12px;
    border-radius: 100px;
    background: rgba(0, 212, 255, 0.06);
    color: var(--accent-cyan);
    border: 1px solid rgba(0, 212, 255, 0.1);
}

/* --- Certifications --- */
#certifications {
    background: var(--bg-secondary);
}

.certs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
}

.cert-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.cert-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow);
}

.cert-card:hover::before {
    transform: scaleX(1);
}

.cert-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.cert-icon {
    font-size: 2rem;
    color: var(--accent-cyan);
    margin-bottom: 16px;
    opacity: 0.8;
}

.cert-card h3 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.cert-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.cert-date {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.cert-id {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-family: 'Monaco', 'Cascadia Code', monospace;
    letter-spacing: 0.5px;
    background: rgba(255, 255, 255, 0.03);
    padding: 2px 10px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

/* --- Statistics Section --- */
#stats {
    background: var(--bg-primary);
    padding: 80px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.stat-item {
    text-align: center;
    padding: 32px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    position: relative;
    overflow: hidden;
    transition: all var(--transition);
}

.stat-item:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.stat-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-1);
    opacity: 0;
    transition: opacity var(--transition);
}

.stat-item:hover::after {
    opacity: 1;
}

.stat-icon {
    font-size: 1.5rem;
    color: var(--accent-cyan);
    margin-bottom: 12px;
    opacity: 0.7;
}

.stat-number {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-plus {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-cyan);
    margin-left: 2px;
}

.stat-label {
    display: block;
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* --- Tech Stack Section --- */
#techstack {
    background: var(--bg-secondary);
}

.tech-marquee {
    overflow: hidden;
    padding: 20px 0;
    position: relative;
}

.tech-marquee::before,
.tech-marquee::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 80px;
    z-index: 2;
    pointer-events: none;
}

.tech-marquee::before {
    left: 0;
    background: linear-gradient(90deg, var(--bg-secondary), transparent);
}

.tech-marquee::after {
    right: 0;
    background: linear-gradient(270deg, var(--bg-secondary), transparent);
}

.tech-track {
    display: flex;
    gap: 16px;
    animation: marquee-scroll 30s linear infinite;
    width: max-content;
}

.tech-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    padding: 10px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    color: var(--text-secondary);
    white-space: nowrap;
    transition: all var(--transition);
}

.tech-item i {
    font-size: 1rem;
    color: var(--accent-cyan);
}

.tech-item:hover {
    border-color: var(--accent-cyan);
    color: var(--text-primary);
    background: rgba(0, 212, 255, 0.06);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.1);
}

@keyframes marquee-scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* --- Contact Section --- */
#contact {
    background: var(--bg-primary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.contact-info h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.contact-info > p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 32px;
    line-height: 1.7;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.contact-item:hover {
    border-color: var(--border-glow);
    background: rgba(0, 212, 255, 0.04);
}

.contact-item-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.08);
    border-radius: var(--radius-sm);
    color: var(--accent-cyan);
    font-size: 0.9rem;
}

.contact-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 2px;
}

.contact-item-text a {
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: color var(--transition);
}

.contact-item-text a:hover {
    color: var(--accent-cyan);
}

.contact-form-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 36px;
}

.form-group {
    position: relative;
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    outline: none;
    transition: all var(--transition);
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.03);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.06);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-highlight {
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: all var(--transition);
    transform: translateX(-50%);
}

.form-group input:focus ~ .form-highlight,
.form-group textarea:focus ~ .form-highlight {
    width: 80%;
}

.submit-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    background: var(--gradient-1);
    color: #fff;
    border: none;
    border-radius: 100px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 4px 25px rgba(0, 212, 255, 0.25);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 35px rgba(0, 212, 255, 0.35);
}

.submit-btn i {
    font-size: 0.85rem;
}

/* Availability Badge */
.availability-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: #10b981;
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.15);
    padding: 6px 16px;
    border-radius: 100px;
    margin-bottom: 20px;
}

/* Resume Download Link */
.form-footer {
    text-align: center;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.resume-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: color var(--transition);
}

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

/* Tertiary CTA (Hero resume button) */
.cta-tertiary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: all var(--transition);
}

.cta-tertiary:hover {
    color: var(--accent-cyan);
}

/* Animated Gradient Text */
.gradient-text {
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple), var(--accent-cyan));
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 4s ease infinite;
}

@keyframes gradient-shift {
    0% { background-position: 0% center; }
    50% { background-position: 100% center; }
    100% { background-position: 0% center; }
}

/* Cert Card Accent Colors */
.cert-card {
    --cert-accent: var(--accent-cyan);
}

.cert-card::before {
    background: var(--cert-accent) !important;
}

.cert-card .cert-icon {
    color: var(--cert-accent);
}

/* --- Footer --- */
#footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 48px 0;
}

.footer-content {
    text-align: center;
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.footer-tagline {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 24px;
}

.footer-socials {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
}

.footer-social {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: all var(--transition);
}

.footer-social:hover {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.15);
}

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

.footer-copy a {
    color: var(--text-secondary);
    transition: color var(--transition);
}

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

.footer-sep {
    margin: 0 8px;
    opacity: 0.4;
}

.footer-heart {
    color: #ef4444;
}

/* --- Back to Top --- */
#back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    z-index: 8000;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition);
    backdrop-filter: blur(10px);
}

#back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

#back-to-top:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.2);
    transform: translateY(-2px);
}

/* --- Scroll Reveal Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-scale.visible {
    opacity: 1;
    transform: scale(1);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .skills-grid {
        grid-template-columns: 1fr;
    }
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .hero-stats-mini {
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(10, 10, 15, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        padding: 40px;
        gap: 24px;
        transition: right var(--transition);
        border-left: 1px solid var(--border-color);
    }

    .nav-links.open {
        right: 0;
    }

    .hamburger {
        display: flex;
    }

    .section {
        padding: 80px 0;
    }

    .hero-title {
        flex-direction: column;
        gap: 4px;
    }

    .hero-separator {
        display: none;
    }

    .hero-subtitle {
        font-size: clamp(1.5rem, 6vw, 2.2rem);
    }

    .hero-stats-mini {
        gap: 24px;
    }

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

    #scroll-spy {
        display: none;
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .timeline {
        padding-left: 32px;
    }

    .contact-form-wrapper {
        padding: 24px;
    }

    .about-highlights {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .cta-primary,
    .cta-secondary,
    .cta-tertiary {
        width: 100%;
        justify-content: center;
    }

    .project-filters {
        gap: 8px;
    }

    .filter-btn {
        padding: 6px 16px;
        font-size: 0.75rem;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

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

    .hero-stat-num {
        font-size: 1.4rem;
    }

    #back-to-top {
        bottom: 20px;
        right: 20px;
        width: 38px;
        height: 38px;
    }
}