/* ==========================================================================
   DESIGN SYSTEM & VARIABLES
   ========================================================================== */

:root {
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    
    /* Font Weight */
    --fw-light: 300;
    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;
    --fw-extrabold: 800;
    
    /* Layout Sizes */
    --header-height: 80px;
    --container-width: 1100px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
}

/* Light Theme Variables (Default) */
:root, html[data-theme="light"] {
    --bg-primary: #f0f4f8;
    --bg-secondary: #e1e8f0;
    --bg-card: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --border-color: #cbd5e1;
    --accent-color: #0ea5e9;
    --accent-hover: #0284c7;
    --glow-color: rgba(14, 165, 233, 0.15);
    --header-bg: rgba(240, 244, 248, 0.85);
    --card-hover-bg: #f8fafc;
    --input-bg: #ffffff;
    --logo-filter: none;
}

/* Dark Theme Variables */
html[data-theme="dark"] {
    --bg-primary: #050b14;
    --bg-secondary: #0a1120;
    --bg-card: #0f192b;
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --text-muted: #aaaaaa;
    --border-color: #1a2a44;
    --accent-color: #00ffcc;
    --accent-hover: #00ccaa;
    --glow-color: rgba(0, 255, 204, 0.05);
    --header-bg: rgba(5, 11, 20, 0.85);
    --card-hover-bg: #15243d;
    --input-bg: #07101d;
    --logo-filter: invert(1);
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */

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

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

body {
    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

button, input, textarea {
    font-family: inherit;
    color: inherit;
    background: none;
    border: none;
    outline: none;
}

button {
    cursor: pointer;
}

img, svg {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Background Grid Effect */
.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    opacity: 0.4;
    pointer-events: none;
    background-size: 40px 40px;
    background-image: 
        linear-gradient(to right, var(--border-color) 1px, transparent 1px),
        linear-gradient(to bottom, var(--border-color) 1px, transparent 1px);
    mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, #000 70%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, #000 70%, transparent 100%);
}

.glow-effect {
    position: fixed;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--glow-color) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
}

/* ==========================================================================
   LAYOUT UTILITIES
   ========================================================================== */

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section-header {
    margin-bottom: 3.5rem;
}

.section-tag {
    font-size: 0.85rem;
    font-weight: var(--fw-semibold);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    display: inline-block;
    margin-bottom: 0.75rem;
}

.section-title {
    font-size: 2.25rem;
    font-weight: var(--fw-bold);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

/* ==========================================================================
   BUTTONS & CTA
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.75rem;
    font-size: 0.95rem;
    font-weight: var(--fw-semibold);
    border-radius: 6px;
    transition: all var(--transition-fast);
}

.btn-primary {
    background-color: var(--accent-color);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    margin-left: 1rem;
}

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

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: var(--header-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
    transition: border-color var(--transition-normal), background-color var(--transition-normal);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.logo {
    font-size: 1.25rem;
    font-weight: var(--fw-extrabold);
    letter-spacing: -0.03em;
    display: flex;
    align-items: center;
}

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

.nav-links {
    display: flex;
    gap: 2.25rem;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: var(--fw-medium);
    color: var(--text-secondary);
    position: relative;
    padding: 0.25rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1.5px;
    background-color: var(--text-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-fast);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
    transform-origin: left;
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* Theme Toggle Button */
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--text-primary);
    border-color: var(--text-primary);
    background-color: var(--bg-secondary);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-normal);
}

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

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    z-index: 102;
}

.mobile-menu-toggle .bar {
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.mobile-menu-toggle.open .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.mobile-menu-toggle.open .bar:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.open .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Menu Drawer */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 75%;
    max-width: 320px;
    height: 100vh;
    background-color: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    padding: 7rem 2.5rem;
    z-index: 101;
    transition: right var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.mobile-menu.open {
    right: 0;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.mobile-nav-link {
    font-size: 1.25rem;
    font-weight: var(--fw-semibold);
    color: var(--text-secondary);
}

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

/* ==========================================================================
   HERO SECTION
   ========================================================================== */

.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: var(--header-height);
}

.hero-container {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    position: relative;
}

.hero-badge {
    font-size: 0.8rem;
    font-weight: var(--fw-semibold);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    margin-bottom: 2rem;
    background-color: var(--bg-secondary);
    display: inline-flex;
    align-items: center;
}

.hero-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: #2ec4b6;
    margin-right: 0.5rem;
    animation: pulse 2s infinite;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: var(--fw-extrabold);
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--text-secondary);
    max-width: 620px;
    margin-bottom: 3rem;
    font-weight: var(--fw-light);
    line-height: 1.6;
}

.hero-ctas {
    display: flex;
    margin-bottom: 4rem;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 4rem;
    margin-bottom: 2rem;
}

.hero-text-block {
    flex: 1.2;
}

.hero-image-block {
    flex: 0.8;
    display: flex;
    justify-content: center;
    align-items: center;
}

.profile-image-container {
    position: relative;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    padding: 6px;
    border: 1.5px dashed var(--text-muted);
    background-color: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.profile-image-container:hover {
    border-color: var(--text-primary);
    transform: scale(1.02);
}

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

.profile-image-placeholder {
    position: absolute;
    top: 6px;
    left: 6px;
    right: 6px;
    bottom: 6px;
    border-radius: 50%;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-card);
    text-align: center;
    padding: 1.5rem;
}

.profile-image-placeholder svg {
    width: 90px;
    height: 90px;
    margin-bottom: 0.75rem;
}

.placeholder-text {
    font-size: 0.75rem;
    font-weight: var(--fw-semibold);
    color: var(--text-secondary);
    line-height: 1.4;
}

.placeholder-text code {
    display: inline-block;
    margin-top: 0.25rem;
    padding: 0.1rem 0.3rem;
    font-family: monospace;
    background: var(--bg-primary);
    border-radius: 3px;
    color: var(--text-primary);
}

.scroll-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: var(--fw-medium);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.mouse {
    width: 18px;
    height: 28px;
    border: 1.5px solid var(--text-muted);
    border-radius: 10px;
    position: relative;
}

.wheel {
    width: 3px;
    height: 6px;
    background-color: var(--text-muted);
    border-radius: 2px;
    position: absolute;
    top: 5px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll-wheel 1.6s infinite;
}

/* ==========================================================================
   ABOUT SECTION
   ========================================================================== */

.about-section {
    padding: 8rem 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 5rem;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.about-text p.lead {
    font-size: 1.35rem;
    color: var(--text-primary);
    font-weight: var(--fw-light);
    line-height: 1.5;
    margin-bottom: 2rem;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.stat-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 8px;
    transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.stat-card:hover {
    transform: translateX(5px);
    border-color: var(--text-primary);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: var(--fw-extrabold);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: var(--fw-medium);
}

/* ==========================================================================
   SKILLS SECTION
   ========================================================================== */

.skills-section {
    padding: 6rem 0;
    position: relative;
    overflow: hidden;
}

.skills-marquee-container {
    width: 100vw;
    max-width: 100%;
    overflow: hidden;
    position: relative;
    margin-top: 3rem;
    padding: 3rem 0;
    /* Cyber grid background */
    background-color: var(--bg-primary);
    background-image: 
        linear-gradient(var(--glow-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--glow-color) 1px, transparent 1px);
    background-size: 30px 30px;
}

/* Fading edges effect */
.skills-marquee-container::before,
.skills-marquee-container::after {
    content: "";
    position: absolute;
    top: 0;
    width: 150px;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.skills-marquee-container::before {
    left: 0;
    background: linear-gradient(to right, var(--bg-primary) 0%, transparent 100%);
}

.skills-marquee-container::after {
    right: 0;
    background: linear-gradient(to left, var(--bg-primary) 0%, transparent 100%);
}

.skills-marquee-track {
    display: flex;
    width: max-content;
    animation: scroll-left-to-right 30s linear infinite;
}

.skills-marquee-track:hover {
    animation-play-state: paused;
}

.skills-marquee-item {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 100px;
    margin: 0 30px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

/* Custom Tooltip */
.skills-marquee-item::after {
    content: attr(data-name);
    position: absolute;
    bottom: -35px;
    background-color: var(--accent-color);
    color: var(--bg-primary);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: var(--fw-bold);
    opacity: 0;
    transform: translateY(10px);
    transition: all var(--transition-fast);
    pointer-events: none;
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(0, 255, 204, 0.3);
}

.skills-marquee-item img {
    width: 50px;
    height: 50px;
    object-fit: contain;
    transition: filter var(--transition-normal), transform var(--transition-normal);
    /* Make logos grayscale by default, colored on hover */
    filter: grayscale(100%) opacity(0.7) var(--logo-filter);
}

.skills-marquee-item:hover {
    transform: translateY(-10px);
    border-color: var(--accent-color);
    box-shadow: 0 10px 30px rgba(0, 255, 204, 0.1);
}

.skills-marquee-item:hover::after {
    opacity: 1;
    transform: translateY(0);
}

.skills-marquee-item:hover img {
    filter: grayscale(0%) opacity(1) var(--logo-filter);
    transform: scale(1.1);
}

@keyframes scroll-left-to-right {
    0% {
        transform: translateX(0);
    }
    100% {
        /* Translate by exactly half the track width (the duplicated portion) */
        transform: translateX(-50%);
    }
}

/* ==========================================================================
   WORK EXPERIENCE TIMELINE
   ========================================================================== */

.experience-section {
    padding: 8rem 0;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 2rem;
}

.timeline-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 1px;
    background-color: var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 4rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -2rem;
    top: 6px;
    transform: translateX(-50%);
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background-color: var(--bg-primary);
    border: 2px solid var(--text-primary);
    transition: background-color var(--transition-fast);
}

.timeline-item:hover .timeline-marker {
    background-color: var(--text-primary);
}

.timeline-content {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 2.25rem;
    border-radius: 8px;
    transition: border-color var(--transition-fast);
}

.timeline-item:hover .timeline-content {
    border-color: var(--text-secondary);
}

.timeline-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.timeline-date {
    font-size: 0.85rem;
    font-weight: var(--fw-semibold);
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

.timeline-company {
    font-size: 0.85rem;
    font-weight: var(--fw-semibold);
    background-color: var(--bg-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.timeline-role {
    font-size: 1.35rem;
    font-weight: var(--fw-bold);
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

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

/* ==========================================================================
   PROJECTS GRID & FILTERS
   ========================================================================== */

.projects-section {
    padding: 8rem 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.project-filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 4rem;
    flex-wrap: wrap;
}

.filter-btn {
    font-size: 0.85rem;
    font-weight: var(--fw-semibold);
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    background-color: var(--bg-primary);
    transition: all var(--transition-fast);
}

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

.filter-btn.active {
    background-color: var(--accent-color);
    color: var(--bg-primary);
    border-color: var(--accent-color);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2.5rem;
}

.project-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: all var(--transition-normal);
}

.project-card:hover {
    border-color: var(--text-secondary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

/* Force filtering animation */
.project-card.hide {
    display: none;
}

.project-card-image {
    position: relative;
    overflow: hidden;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.project-card-image svg {
    transition: transform var(--transition-normal);
    width: 100%;
    height: auto;
}

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

.project-tag {
    position: absolute;
    bottom: 1.25rem;
    left: 1.25rem;
    font-size: 0.75rem;
    font-weight: var(--fw-semibold);
    color: var(--text-secondary);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 0.3rem 0.75rem;
    border-radius: 4px;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.project-card-content {
    padding: 2.25rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-card-title {
    font-size: 1.25rem;
    font-weight: var(--fw-bold);
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}

.project-card-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 2rem;
    flex-grow: 1;
}

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

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    font-weight: var(--fw-semibold);
    color: var(--text-secondary);
}

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

.project-link svg {
    transition: transform var(--transition-fast);
}

.project-link:hover svg {
    transform: translate(2px, -2px);
}

/* ==========================================================================
   CERTIFICATES SECTION
   ========================================================================== */

.certificates-section {
    padding: 8rem 0;
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.certificate-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: all var(--transition-normal);
}

.certificate-card:hover {
    border-color: var(--text-secondary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.certificate-image {
    position: relative;
    overflow: hidden;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
}

.certificate-image svg {
    transition: transform var(--transition-normal);
    width: 100%;
    height: auto;
}

.certificate-card:hover .certificate-image svg {
    transform: scale(1.03);
}

.certificate-badge {
    position: absolute;
    bottom: 1.25rem;
    left: 1.25rem;
    font-size: 0.75rem;
    font-weight: var(--fw-semibold);
    color: var(--text-secondary);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 0.3rem 0.75rem;
    border-radius: 4px;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.certificate-content {
    padding: 2.25rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.certificate-title {
    font-size: 1.25rem;
    font-weight: var(--fw-bold);
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}

.certificate-issuer {
    font-size: 0.85rem;
    font-weight: var(--fw-semibold);
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.certificate-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 2rem;
    flex-grow: 1;
}

.certificate-verify-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    font-weight: var(--fw-semibold);
    color: var(--text-secondary);
    align-self: flex-start;
}

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

.certificate-verify-link svg {
    transition: transform var(--transition-fast);
}

.certificate-verify-link:hover svg {
    transform: translate(2px, -2px);
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */

.contact-section {
    padding: 8rem 0;
}

.connect-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.connect-header {
    align-items: center;
}

.connect-lead {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: var(--fw-light);
    margin-bottom: 3.5rem;
    line-height: 1.5;
}

.social-links-center {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.social-links-center .social-link {
    font-size: 1.1rem;
    font-weight: var(--fw-medium);
    color: var(--text-secondary);
    position: relative;
}

.social-links-center .social-link:hover {
    color: var(--text-primary);
}

.social-links-center .social-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--text-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-fast);
}

.social-links-center .social-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.contact-lead {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: var(--fw-light);
    margin-bottom: 3.5rem;
    line-height: 1.5;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.contact-detail-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.detail-label {
    font-size: 0.75rem;
    font-weight: var(--fw-semibold);
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.1em;
}

.detail-value {
    font-size: 1.25rem;
    font-weight: var(--fw-medium);
}

.detail-value:hover {
    color: var(--text-primary);
    text-decoration: underline;
}

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

.social-link {
    font-size: 0.95rem;
    font-weight: var(--fw-medium);
    color: var(--text-secondary);
    position: relative;
}

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

.social-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--text-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-fast);
}

.social-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.form-group {
    position: relative;
    border-bottom: 1px solid var(--border-color);
    padding-top: 1.25rem;
    transition: border-color var(--transition-fast);
}

.form-group:focus-within {
    border-color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.5rem 0 0.75rem;
    font-size: 1rem;
    color: var(--text-primary);
    background: transparent;
    border: none;
    resize: none;
}

.form-group label {
    position: absolute;
    top: 1.75rem;
    left: 0;
    font-size: 0.95rem;
    color: var(--text-muted);
    pointer-events: none;
    transition: all var(--transition-fast);
}

/* Floating labels effect */
.form-group input:focus ~ label,
.form-group input:not(:placeholder-shown) ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:not(:placeholder-shown) ~ label {
    top: 0;
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: var(--fw-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn-submit {
    align-self: flex-start;
    gap: 0.75rem;
    margin-top: 1rem;
}

.send-icon {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
}

.btn-submit:hover .send-icon {
    transform: translate(3px, -3px);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.footer {
    border-top: 1px solid var(--border-color);
    padding: 4rem 0;
    background-color: var(--bg-primary);
    transition: background-color var(--transition-normal);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.copyright {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.footer-tagline {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: var(--fw-medium);
}

/* ==========================================================================
   TOAST NOTIFICATION
   ========================================================================== */

.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--text-primary);
    color: var(--bg-primary);
    padding: 1rem 1.75rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: var(--fw-semibold);
    box-shadow: var(--shadow-md);
    transform: translateY(150%);
    opacity: 0;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
    z-index: 1000;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

/* ==========================================================================
   ANIMATIONS & SCROLL REVEALS
   ========================================================================== */

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(46, 196, 182, 0.4);
    }
    70% {
        box-shadow: 0 0 0 8px rgba(46, 196, 182, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(46, 196, 182, 0);
    }
}

@keyframes scroll-wheel {
    0% {
        transform: translate(-50%, 0);
        opacity: 1;
    }
    50% {
        transform: translate(-50%, 8px);
        opacity: 0.3;
    }
    100% {
        transform: translate(-50%, 0);
        opacity: 1;
    }
}

/* Intro Animations */
.animate-fade-in {
    opacity: 0;
    animation: fade-in 1s forwards cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    animation: fade-in-up 1s forwards cubic-bezier(0.16, 1, 0.3, 1);
}

.delay-1 {
    animation-delay: 0.2s;
}

.delay-2 {
    animation-delay: 0.4s;
}

.delay-3 {
    animation-delay: 0.6s;
}

@keyframes fade-in {
    to {
        opacity: 1;
    }
}

@keyframes fade-in-up {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll reveal items */
.scroll-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.scroll-reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   MEDIA QUERIES (RESPONSIVENESS)
   ========================================================================== */

@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .section-title {
        font-size: 1.85rem;
    }
    
    .about-stats {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .stat-card {
        flex: 1 1 200px;
    }
    
    .hero-content {
        flex-direction: column-reverse;
        gap: 2.5rem;
        text-align: left;
        align-items: flex-start;
        margin-top: 2rem;
    }

    .profile-image-container {
        width: 200px;
        height: 200px;
    }

    .profile-image-placeholder svg {
        width: 70px;
        height: 70px;
    }
    
    .hero-ctas {
        width: 100%;
        flex-direction: column;
        gap: 1rem;
    }
    
    .btn {
        width: 100%;
    }
    
    .btn-secondary {
        margin-left: 0;
    }
}