/* ===== CSS Custom Properties (Design Tokens) ===== */
:root {
    /* Color Palette — Light Minimalist */
    --bg-primary: #f5f5f7;
    --bg-secondary: #eeeef0;
    --bg-tertiary: #e8e8ec;
    --bg-card: #ffffff;
    --bg-card-hover: #fafafa;
    --bg-tag: #eeeef0;

    /* Accent — Restrained Charcoal */
    --accent-primary: #1a1a1a;
    --accent-secondary: #555555;
    --accent-border: #d8d8d8;
    --accent-border-hover: #bbb;

    /* Text Colors */
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-muted: #999999;
    --text-accent: #1a1a1a;

    /* Borders & Shadows */
    --card-border: #e5e5e5;
    --card-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
    --card-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.08);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1100px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    /* Color Palette — Deep Slate Dark Mode */
    --bg-primary: #0a0a0c;
    --bg-secondary: #16161a;
    --bg-tertiary: #22222a;
    --bg-card: #121215;
    --bg-card-hover: #1c1c22;
    --bg-tag: #22222a;

    /* Accent — Premium Silver */
    --accent-primary: #f5f5f7;
    --accent-secondary: #aaaaaa;
    --accent-border: #2c2c35;
    --accent-border-hover: #444455;

    /* Text Colors */
    --text-primary: #f5f5f7;
    --text-secondary: #a0a0ab;
    --text-muted: #71717a;
    --text-accent: #f5f5f7;

    /* Borders & Shadows */
    --card-border: #22222a;
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    --card-shadow-hover: 0 8px 35px rgba(0, 0, 0, 0.6);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    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: rgba(26, 26, 26, 0.12);
    color: #000;
}

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #aaa;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0 2rem;
    transition: var(--transition-smooth);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(245, 245, 247, 0.85);
    backdrop-filter: blur(16px) saturate(1.6);
    border-bottom: 1px solid var(--card-border);
}

[data-theme="dark"] .navbar.scrolled {
    background: rgba(10, 10, 12, 0.85);
}

/* Theme Toggle Button */
.theme-toggle {
    background: transparent;
    border: 1px solid var(--accent-border);
    color: var(--text-primary);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    padding: 0;
    margin-right: 1.5rem;
    margin-left: auto;
}

.theme-toggle:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-border-hover);
    transform: translateY(-1px);
}

/* Toggle icon display based on theme */
[data-theme="dark"] .sun-icon {
    display: block;
}
[data-theme="dark"] .moon-icon {
    display: none;
}

html:not([data-theme="dark"]) .sun-icon {
    display: none;
}
html:not([data-theme="dark"]) .moon-icon {
    display: block;
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
    transition: var(--transition-fast);
}

.logo-bracket,
.logo-dot {
    color: var(--text-primary);
}

.nav-logo:hover {
    opacity: 0.7;
}

.nav-links {
    display: flex;
    gap: 0.25rem;
}

.nav-link {
    position: relative;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 450;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: var(--transition-fast);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--transition-smooth);
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: translateX(-50%) scaleX(1);
}

.nav-resume-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--bg-card);
    background: var(--accent-primary);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.5rem 1.25rem;
    border-radius: 8px;
    transition: var(--transition-smooth);
}

.nav-resume-btn:hover {
    background: #333;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

[data-theme="dark"] .nav-resume-btn:hover {
    background: #e5e5e7;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.mobile-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-smooth);
}

.mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 2rem 80px;
    overflow: hidden;
    background: var(--bg-primary);
}

.hero-container {
    max-width: var(--container-width);
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    gap: 4rem;
    position: relative;
    z-index: 1;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    border-radius: 50px;
    padding: 0.5rem 1.25rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    width: fit-content;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.3); }
    50% { box-shadow: 0 0 0 6px rgba(34, 197, 94, 0); }
}

.hero-greeting {
    display: block;
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.hero-name {
    display: block;
    font-size: clamp(3rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.05;
    color: var(--text-primary);
    letter-spacing: -2px;
}

.name-letter {
    display: inline-block;
}

.hero-title {
    line-height: 1.15;
}

.hero-roles {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.15rem;
    min-height: 2.5rem;
}

.role-prefix {
    color: var(--text-secondary);
    font-weight: 400;
}

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

.typewriter-cursor {
    color: var(--text-muted);
    animation: blink 1s step-end infinite;
    font-weight: 300;
}

@keyframes blink {
    50% { opacity: 0; }
}

.hero-description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 540px;
    line-height: 1.75;
}

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

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--accent-primary);
    color: var(--bg-card);
    text-decoration: none;
    padding: 0.85rem 2rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.92rem;
    transition: var(--transition-smooth);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background: #333;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

[data-theme="dark"] .btn-primary:hover {
    background: #e5e5e7;
}

.btn-primary span,
.btn-primary svg {
    position: relative;
    z-index: 1;
}

.btn-primary svg {
    transition: transform var(--transition-smooth);
}

.btn-primary:hover svg {
    transform: translateX(3px);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: transparent;
    color: var(--text-primary);
    text-decoration: none;
    padding: 0.85rem 2rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.92rem;
    border: 1.5px solid var(--accent-border);
    transition: var(--transition-smooth);
}

.btn-secondary:hover {
    border-color: var(--text-primary);
    background: rgba(0, 0, 0, 0.03);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1rem;
    margin-top: 1rem;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-top: 1.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--card-border);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 1.85rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-plus {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-divider {
    width: 1px;
    height: 36px;
    background: var(--card-border);
}

/* ===== Profile Visual ===== */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.profile-card {
    position: relative;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.profile-ring {
    display: none;
}

.profile-ring.ring-2 {
    display: none;
}

.profile-image {
    width: 280px;
    height: 280px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center top;
    border: 3px solid var(--card-border);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
    transition: var(--transition-smooth);
}

.profile-image:hover {
    transform: scale(1.03);
    box-shadow: 0 12px 50px rgba(0, 0, 0, 0.12);
}

.profile-badge {
    position: absolute;
    bottom: 20px;
    right: 30px;
    width: 36px;
    height: 36px;
    background: var(--accent-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-card);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Floating Icons — hidden in clean design */
.floating-icon {
    display: none;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    z-index: 1;
}

.scroll-indicator span {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 500;
}

.scroll-line {
    width: 1px;
    height: 36px;
    background: linear-gradient(to bottom, var(--text-muted), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; opacity: 1; }
    50% { transform: scaleY(1); transform-origin: top; opacity: 1; }
    50.01% { transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* ===== Section Styles ===== */
.section {
    padding: var(--section-padding);
    position: relative;
    z-index: 1;
}

.section-alt {
    background: var(--bg-secondary);
}

.section-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 3.5rem;
}

.section-number {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

.section-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    letter-spacing: -0.5px;
}

.section-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(to right, var(--card-border), transparent);
    max-width: 300px;
}

/* ===== Card Base ===== */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    transition: var(--transition-smooth);
    box-shadow: var(--card-shadow);
}

.glass-card:hover {
    border-color: var(--accent-border-hover);
    box-shadow: var(--card-shadow-hover);
}

/* ===== About Section ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 1.25rem;
    line-height: 1.85;
}

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

.about-details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.detail-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    transition: var(--transition-smooth);
    box-shadow: var(--card-shadow);
}

.detail-card:hover {
    border-color: var(--accent-border-hover);
    transform: translateX(6px);
    box-shadow: var(--card-shadow-hover);
}

.detail-icon {
    width: 44px;
    height: 44px;
    min-width: 44px;
    background: var(--bg-secondary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.detail-info {
    display: flex;
    flex-direction: column;
}

.detail-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 600;
}

.detail-value {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 600;
}

.detail-sub {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ===== Experience Timeline ===== */
.timeline {
    position: relative;
    padding-left: 3rem;
}

.timeline-item {
    display: flex;
    gap: 2rem;
    position: relative;
}

.timeline-marker {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: absolute;
    left: -3rem;
    top: 0;
    height: 100%;
}

.timeline-dot {
    width: 14px;
    height: 14px;
    min-height: 14px;
    background: var(--accent-primary);
    border-radius: 50%;
    position: relative;
    z-index: 1;
}

.timeline-line-connector {
    width: 2px;
    flex: 1;
    background: linear-gradient(to bottom, var(--accent-border), transparent);
    margin-top: 4px;
}

.timeline-content {
    padding: 2rem;
    width: 100%;
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.timeline-role {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.timeline-company {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

.timeline-date {
    font-size: 0.8rem;
    color: var(--text-muted);
    white-space: nowrap;
    background: var(--bg-tag);
    padding: 0.35rem 1rem;
    border-radius: 20px;
    font-weight: 500;
}

.timeline-details {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    margin-bottom: 1.5rem;
}

.timeline-details li {
    display: flex;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
}

.detail-arrow {
    color: var(--text-muted);
    font-size: 1rem;
    min-width: 16px;
    margin-top: 2px;
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: var(--bg-tag);
    border: 1px solid var(--card-border);
    padding: 0.3rem 0.85rem;
    border-radius: 20px;
    transition: var(--transition-fast);
    font-weight: 500;
}

.tag:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* ===== Projects Grid ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 1.5rem;
}

.project-card {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.project-card:hover {
    transform: translateY(-4px);
}

.project-card-inner {
    position: relative;
    z-index: 1;
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    height: 100%;
    display: flex;
    flex-direction: column;
    transition: var(--transition-smooth);
    box-shadow: var(--card-shadow);
}

.project-card:hover .project-card-inner {
    border-color: var(--accent-border-hover);
    box-shadow: var(--card-shadow-hover);
}

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

.project-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.project-icon {
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.project-card:hover .project-icon {
    color: var(--text-primary);
}

.project-links {
    display: flex;
    gap: 0.75rem;
}

.project-link {
    color: var(--text-muted);
    transition: var(--transition-fast);
    padding: 4px;
}

.project-link:hover {
    color: var(--text-primary);
    transform: translateY(-2px);
}

.project-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    transition: var(--transition-fast);
}

.project-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.75;
    margin-bottom: 1rem;
    flex: 1;
}

.project-features {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.82rem;
    margin-bottom: 0.5rem;
}

.feature-dot {
    width: 4px;
    height: 4px;
    background: var(--text-muted);
    border-radius: 50%;
    min-width: 4px;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--card-border);
}

.project-tech span {
    font-size: 0.75rem;
    color: var(--text-muted);
    transition: var(--transition-fast);
}

.project-tech span:hover {
    color: var(--text-primary);
}

/* ===== Skills Section ===== */
.skills-showcase {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    max-width: 800px;
    margin: 0 auto;
}

.skill-group-header {
    margin-bottom: 1rem;
}

.skill-group-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.35rem;
}

.skill-group-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 400;
}

.skill-group-divider {
    height: 1px;
    background: var(--card-border);
    margin-bottom: 1.25rem;
}

.skill-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
}

.skill-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.55rem 1.1rem;
    background: var(--bg-primary);
    border: 1px solid var(--card-border);
    border-radius: 50px;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: default;
    transition: all 0.3s ease;
}

.skill-chip:hover {
    transform: translateY(-2px);
    background: var(--bg-secondary);
    border-color: var(--text-muted);
    color: var(--text-primary);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.skill-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* ===== Certifications ===== */
.certs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 1rem;
}

.cert-card {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.25rem;
    transition: var(--transition-smooth);
}

.cert-card:hover {
    transform: translateX(6px);
}

.cert-badge {
    width: 48px;
    height: 48px;
    min-width: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.cert-badge.oracle {
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.cert-badge.nptel {
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.cert-badge.udemy {
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.cert-badge.openhpi {
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.cert-card:hover .cert-badge {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.cert-info {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.cert-title {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
}

.cert-issuer {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.cert-date {
    font-size: 0.72rem;
    color: var(--text-muted);
}

.certs-view-all {
    text-align: center;
    margin-top: 2.5rem;
}

/* ===== Contact Section ===== */
.contact-header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.contact-heading {
    font-size: clamp(2.25rem, 5vw, 3.25rem);
    font-weight: 300;
    color: var(--text-primary);
    letter-spacing: -1px;
    margin-bottom: 0.75rem;
}

.contact-subheading {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.7;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem 1.25rem;
    background: var(--bg-secondary);
    border: 1px solid transparent;
    border-radius: 10px;
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
    outline: none;
    resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
    font-weight: 400;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent-border-hover);
    background: var(--bg-card);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.04);
}

.contact-send-btn {
    width: 100%;
    padding: 1rem 2rem;
    background: #333;
    color: #fff;
    border: none;
    border-radius: 10px;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    margin-top: 0.5rem;
}

.contact-send-btn:hover {
    background: var(--accent-primary);
    color: var(--bg-card);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.contact-send-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.contact-send-btn.loading {
    position: relative;
    color: transparent;
}

.contact-send-btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: btn-spin 0.6s linear infinite;
}

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

.form-status {
    margin-top: 1rem;
    padding: 0;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1.5;
    text-align: center;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.3s ease, transform 0.3s ease, padding 0.3s ease;
}

.form-status.visible {
    opacity: 1;
    transform: translateY(0);
    padding: 0.85rem 1rem;
}

.form-status.success {
    background: rgba(34, 197, 94, 0.1);
    color: #16a34a;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.form-status.error {
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Connect Info Panel */
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
    padding-top: 0.5rem;
}

.connect-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
}

.connect-socials {
    display: flex;
    gap: 1.25rem;
}

.social-icon-link {
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-icon-link:hover {
    color: var(--text-secondary);
    transform: translateY(-2px);
}

.connect-details {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.connect-detail-item {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.connect-label {
    font-weight: 600;
    color: var(--text-primary);
}

/* ===== Footer ===== */
.footer {
    padding: 3rem 2rem;
    background: var(--accent-primary);
    position: relative;
    z-index: 1;
}

[data-theme="dark"] .footer {
    background: var(--bg-secondary);
}

.footer-container {
    max-width: var(--container-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.footer-social {
    display: flex;
    gap: 1.25rem;
}

.footer-social a {
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition-smooth);
    padding: 8px;
    border-radius: 8px;
}

.footer-social a:hover {
    color: #fff;
    transform: translateY(-2px);
}

.footer-text {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-text strong {
    color: #fff;
}

.footer-copyright {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.4);
}

/* ===== Scroll Animations ===== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease,
                transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

.animate-on-scroll:nth-child(1) { transition-delay: 0s; }
.animate-on-scroll:nth-child(2) { transition-delay: 0.08s; }
.animate-on-scroll:nth-child(3) { transition-delay: 0.16s; }
.animate-on-scroll:nth-child(4) { transition-delay: 0.24s; }
.animate-on-scroll:nth-child(5) { transition-delay: 0.32s; }

/* Hidden elements from old theme */
.cursor-glow,
#particleCanvas {
    display: none !important;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }

    .hero-content {
        align-items: center;
    }

    .hero-description {
        max-width: 100%;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }


    .profile-card {
        width: 260px;
        height: 260px;
    }

    .profile-image {
        width: 230px;
        height: 230px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 80px 0;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        right: 0;
        width: 75%;
        max-width: 320px;
        height: 100vh;
        background: rgba(245, 245, 247, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 6rem 2rem 2rem;
        gap: 0.25rem;
        border-left: 1px solid var(--card-border);
        z-index: 999;
    }

    .nav-links.active {
        display: flex;
        animation: slideIn 0.3s ease;
    }

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

    .nav-link {
        font-size: 1rem;
        padding: 0.85rem 1rem;
    }

    .mobile-toggle {
        display: flex;
    }

    .nav-resume-btn {
        display: none;
    }

    .hero {
        padding: 100px 1.5rem 60px;
    }

    .hero-name {
        font-size: clamp(2.25rem, 8vw, 3.5rem);
    }

    .hero-roles {
        flex-direction: column;
        gap: 0.25rem;
    }

    .hero-stats {
        gap: 1.25rem;
    }

    .profile-card {
        width: 200px;
        height: 200px;
    }

    .profile-image {
        width: 180px;
        height: 180px;
    }

    .section-header {
        margin-bottom: 2.5rem;
    }

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

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

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

    .timeline {
        padding-left: 2rem;
    }

    .timeline-marker {
        left: -2rem;
    }

    .timeline-header {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        flex-wrap: wrap;
        gap: 1rem;
    }

    .stat-divider {
        display: none;
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

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

    .section-container {
        padding: 0 1.25rem;
    }
}

/* ===== Case Studies Section ===== */
.case-studies-section {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 100px 0;
}

.case-studies-section .section-container {
    max-width: 1200px;
}

/* Hero */
.cs-hero {
    margin-bottom: 3.5rem;
}

.cs-label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.25em;
    color: var(--text-muted);
    text-transform: uppercase;
    display: block;
    margin-bottom: 1.5rem;
}

.cs-heading {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.cs-subtext {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 620px;
}

/* Stats */
.cs-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 4rem;
}

.cs-stat {
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.cs-stat:hover {
    border-color: var(--accent-border-hover);
    box-shadow: var(--card-shadow-hover);
}

.cs-stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.cs-stat-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* Case Study Card */
.cs-card {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 0;
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 3rem;
    box-shadow: var(--card-shadow);
    transition: border-color 0.35s ease, box-shadow 0.35s ease;
}

.cs-card:hover {
    border-color: var(--accent-border-hover);
    box-shadow: var(--card-shadow-hover);
}

.cs-card-reverse {
    grid-template-columns: 1fr 400px;
}

.cs-card-reverse .cs-card-image {
    order: 2;
}

.cs-card-reverse .cs-card-content {
    order: 1;
}

/* Card Image */
.cs-card-image {
    position: relative;
    min-height: 420px;
    overflow: hidden;
}

.cs-card-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.8s cubic-bezier(0.25, 1, 0.5, 1);
}

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

.cs-card-image-placeholder {
    position: absolute;
    inset: 0;
    background: linear-gradient(145deg, var(--bg-tertiary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-border);
    overflow: hidden;
}

.cs-card-image-placeholder svg {
    opacity: 0.12;
    z-index: 1;
}

.cs-image-pattern {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(26, 26, 26, 0.04) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(26, 26, 26, 0.03) 0%, transparent 50%);
    z-index: 0;
}

.cs-card-image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem 1.5rem;
    background: linear-gradient(transparent, rgba(26, 26, 26, 0.85));
    z-index: 2;
}

.cs-study-number {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: rgba(255, 255, 255, 0.7);
    display: block;
    margin-bottom: 0.5rem;
}

.cs-study-name {
    font-size: 1.05rem;
    font-weight: 600;
    color: #ffffff;
    line-height: 1.4;
    margin: 0;
}

/* Card Content */
.cs-card-content {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
}

.cs-card-badges {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.cs-badge-selected {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    color: var(--text-primary);
    background: var(--bg-tag);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    border: 1px solid var(--card-border);
    font-weight: 600;
}

.cs-badge-category {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

.cs-card-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.25;
    font-style: italic;
}

.cs-card-desc {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* Pillars: Challenge / Delivery / Impact */
.cs-pillars {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.cs-pillar {
    background: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 1.25rem;
}

.cs-pillar-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    font-weight: 700;
    display: block;
    margin-bottom: 0.75rem;
}

.cs-pillar-label.cs-challenge {
    color: #7c3aed;
}

.cs-pillar-label.cs-delivery {
    color: #2563eb;
}

.cs-pillar-label.cs-impact {
    color: #16a34a;
}

.cs-pillar p {
    font-size: 0.82rem;
    line-height: 1.65;
    color: var(--text-secondary);
    margin: 0;
}

/* Tech Stack */
.cs-tech-section {
    margin-bottom: 1rem;
}

.cs-tech-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    display: block;
    margin-bottom: 0.6rem;
}

.cs-tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.cs-tech-tags span {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    color: var(--text-primary);
    background: var(--bg-tag);
    padding: 0.35rem 0.7rem;
    border-radius: 6px;
    border: 1px solid var(--card-border);
    transition: border-color 0.2s ease;
}

.cs-tech-tags span:hover {
    border-color: var(--accent-border-hover);
}

/* Feature highlights */
.cs-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1.5rem;
}

.cs-features span {
    font-size: 0.78rem;
    color: #16a34a;
    background: rgba(22, 163, 74, 0.06);
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    border: 1px solid rgba(22, 163, 74, 0.18);
}

/* Action buttons */
.cs-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: auto;
}

.cs-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.25s ease;
    cursor: pointer;
}

.cs-btn-source {
    color: var(--text-primary);
    background: var(--bg-tag);
    border: 1px solid var(--card-border);
}

.cs-btn-source:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-border-hover);
}

.cs-btn-demo {
    color: var(--bg-card);
    background: var(--accent-primary);
    border: 1px solid transparent;
}

.cs-btn-demo:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

/* ===== Case Studies Responsive ===== */
@media (max-width: 1024px) {
    .cs-card {
        grid-template-columns: 1fr;
    }

    .cs-card-reverse {
        grid-template-columns: 1fr;
    }

    .cs-card-reverse .cs-card-image {
        order: 0;
    }

    .cs-card-reverse .cs-card-content {
        order: 0;
    }

    .cs-card-image {
        min-height: 280px;
    }
}

@media (max-width: 768px) {
    .case-studies-section {
        padding: 60px 0;
    }

    .cs-heading {
        font-size: 2rem;
    }

    .cs-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.75rem;
    }

    .cs-stat {
        padding: 1.25rem 1rem;
    }

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

    .cs-pillars {
        grid-template-columns: 1fr;
    }

    .cs-card-content {
        padding: 1.5rem;
    }

    .cs-card-title {
        font-size: 1.3rem;
    }

    .cs-card-image {
        min-height: 220px;
    }
}

@media (max-width: 480px) {
    .cs-stats {
        grid-template-columns: 1fr;
    }

    .cs-heading {
        font-size: 1.6rem;
    }
}

/* ===== Email Sending Modal ===== */
.email-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    padding: 1.5rem;
}

.email-modal.active {
    opacity: 1;
    visibility: visible;
}

.email-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.email-modal-dialog {
    position: relative;
    width: 100%;
    max-width: 480px;
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 1.75rem;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    z-index: 1;
    transform: translateY(20px) scale(0.97);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.email-modal.active .email-modal-dialog {
    transform: translateY(0) scale(1);
}

.email-modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.email-modal-title-wrap {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.email-modal-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: 1px solid var(--card-border);
}

.email-modal-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.2rem 0;
}

.email-modal-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0;
}

.email-modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.4rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.email-modal-close:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.email-address-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 0.85rem 1rem;
    margin-bottom: 1.25rem;
}

.email-address-meta {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 0;
}

.email-address-label {
    font-size: 0.68rem;
    font-family: var(--font-mono);
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--text-muted);
}

.email-address-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.email-copy-action {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.85rem;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.email-copy-action:hover {
    border-color: var(--text-primary);
    transform: translateY(-1px);
}

.email-copy-action.copied {
    background: #10b981;
    color: #ffffff;
    border-color: #10b981;
}

.email-client-grid {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.email-client-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

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

.client-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    flex-shrink: 0;
    color: var(--text-primary);
}

.email-client-card:hover .client-icon {
    background: var(--bg-card);
}

.client-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.client-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.client-hint {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.client-arrow {
    color: var(--text-muted);
    transition: transform var(--transition-fast);
}

.email-client-card:hover .client-arrow {
    color: var(--text-primary);
    transform: translateX(3px);
}