/* ==========================================================================
   DESIGN SYSTEM & CUSTOM PROPERTIES
   ========================================================================== */
:root {
    /* Color Palette */
    --color-bg-dark: #07090e;
    --color-bg-card: rgba(14, 20, 35, 0.55);
    --color-bg-card-hover: rgba(20, 28, 48, 0.75);
    
    --color-text-primary: #f8fafc;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    
    --color-cyan: #00f2fe;
    --color-blue: #4facfe;
    --color-purple: #c471ed;
    --color-pink: #f857a6;
    
    --gradient-primary: linear-gradient(135deg, var(--color-cyan) 0%, var(--color-blue) 100%);
    --gradient-accent: linear-gradient(135deg, var(--color-purple) 0%, var(--color-pink) 100%);
    --gradient-card-border: linear-gradient(135deg, rgba(0, 242, 254, 0.2) 0%, rgba(196, 113, 237, 0.1) 100%);
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Space Grotesk', var(--font-sans);
    
    /* Layout & Shadows */
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    
    --box-shadow-glow: 0 0 30px rgba(0, 242, 254, 0.15);
    --box-shadow-glow-alt: 0 0 30px rgba(196, 113, 237, 0.15);
    --backdrop-blur-val: 16px;
    
    /* Animations */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   BASE STYLES & RESET
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    background-color: var(--color-bg-dark);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: #1e293b;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-blue);
    box-shadow: 0 0 10px var(--color-blue);
}

/* Typography Overrides */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-mono);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

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

img {
    max-width: 100%;
    height: auto;
}

/* ==========================================================================
   BACKGROUND ORBS GLOW
   ========================================================================== */
.glow-bg-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(150px);
    z-index: -1;
    pointer-events: none;
    opacity: 0.35;
}

.orb-1 {
    top: 5%;
    right: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(0,242,254,0.4) 0%, rgba(79,172,254,0) 70%);
    animation: pulseOrb 20s infinite alternate;
}

.orb-2 {
    top: 40%;
    left: -15%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(196,113,237,0.3) 0%, rgba(248,87,166,0) 70%);
    animation: pulseOrb 25s infinite alternate-reverse;
}

.orb-3 {
    bottom: 5%;
    right: -5%;
    width: 45vw;
    height: 45vw;
    background: radial-gradient(circle, rgba(0,242,254,0.3) 0%, rgba(196,113,237,0.1) 70%);
}

@keyframes pulseOrb {
    0% { transform: scale(1) translate(0, 0); opacity: 0.3; }
    50% { transform: scale(1.1) translate(3%, 5%); opacity: 0.45; }
    100% { transform: scale(0.9) translate(-3%, -5%); opacity: 0.3; }
}

/* ==========================================================================
   REUSABLE UTILITIES & COMPONENTS
   ========================================================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-padding {
    padding: 100px 0;
}

/* Section Headers */
.section-header {
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.section-underline {
    height: 4px;
    width: 60px;
    background: var(--gradient-primary);
    margin: 0 auto 24px auto;
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

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

/* Gradient & Glow Text */
.gradient-text {
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.text-glow {
    background-image: var(--gradient-primary);
    text-shadow: 0 0 40px rgba(0, 242, 254, 0.4);
}

.text-glow-alt {
    background-image: var(--gradient-accent);
    text-shadow: 0 0 40px rgba(196, 113, 237, 0.4);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.hero-badge {
    background: rgba(0, 242, 254, 0.08);
    border: 1px solid rgba(0, 242, 254, 0.2);
    color: var(--color-cyan);
    margin-bottom: 24px;
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.05);
}

.badge-icon {
    width: 14px;
    height: 14px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #000;
    box-shadow: var(--box-shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 35px rgba(0, 242, 254, 0.4);
}

.btn-primary i {
    transition: transform var(--transition-fast);
}

.btn-primary:hover i {
    transform: translateX(4px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

/* Cards (Glassmorphism Core) */
.card {
    background: var(--color-bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--border-radius-md);
    backdrop-filter: blur(var(--backdrop-blur-val));
    -webkit-backdrop-filter: blur(var(--backdrop-blur-val));
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card:hover {
    background: var(--color-bg-card-hover);
    border-color: rgba(255, 255, 255, 0.12);
}

/* ==========================================================================
   NAVIGATION BAR
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(7, 9, 14, 0.7);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition-normal);
}

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(7, 9, 14, 0.85);
    border-color: rgba(0, 242, 254, 0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: -0.03em;
}

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

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

.nav-menu ul {
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    position: relative;
    padding: 8px 0;
}

.nav-link:hover, .nav-link.active {
    color: var(--color-cyan);
}

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

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
    position: relative;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin: 0 auto;
    max-width: 800px;
    gap: 20px;
}

.hero-text {
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-title {
    font-size: 3.8rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    margin: 0 auto 40px auto;
    max-width: 680px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* Mock IDE Graphic */
.hero-graphic-container {
    position: relative;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
}

.hero-card-glow {
    position: relative;
    border-radius: var(--border-radius-md);
    background: var(--gradient-primary);
    padding: 1px;
    box-shadow: var(--box-shadow-glow);
    animation: cardGlowFloat 6s ease-in-out infinite alternate;
}

@keyframes cardGlowFloat {
    0% { transform: translateY(0); box-shadow: 0 0 30px rgba(0, 242, 254, 0.15); }
    100% { transform: translateY(-12px); box-shadow: 0 15px 40px rgba(0, 242, 254, 0.3); }
}

.hero-card-inner {
    background: #0b0f19;
    border-radius: calc(var(--border-radius-md) - 1px);
    overflow: hidden;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #0f1524;
    padding: 12px 18px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.card-dots {
    display: flex;
    gap: 6px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.card-title-text {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.card-body-code {
    padding: 24px;
    font-family: 'Consolas', 'Courier New', Courier, monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    overflow-x: auto;
}

.code-keyword { color: #f857a6; }
.code-class { color: #00f2fe; }
.code-method { color: #4facfe; }
.code-string { color: #a5f3fc; }
.code-comment { color: #475569; }

/* Scroll Down Indicator */
.scroll-down {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

.mouse-icon {
    width: 26px;
    height: 42px;
    border: 2px solid var(--color-text-secondary);
    border-radius: 20px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--color-cyan);
    border-radius: 2px;
    animation: scrollMouse 1.8s infinite;
}

@keyframes scrollMouse {
    0% { transform: translateY(0); opacity: 1; }
    50% { transform: translateY(6px); opacity: 0.3; }
    100% { transform: translateY(0); opacity: 1; }
}

/* ==========================================================================
   ABOUT SECTION
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    gap: 40px;
    align-items: stretch;
}

.about-info-panel {
    padding: 40px;
}

.card-h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--color-text-primary);
}

.about-text {
    color: var(--color-text-secondary);
    margin-bottom: 24px;
    font-size: 1.05rem;
}

.tech-stack-container {
    margin-top: 32px;
}

.skills-h4 {
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-primary);
    margin-bottom: 16px;
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.skill-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    padding: 8px 16px;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.skill-tag i {
    width: 14px;
    height: 14px;
    color: var(--color-cyan);
}

.skill-tag:hover {
    background: rgba(0, 242, 254, 0.05);
    border-color: rgba(0, 242, 254, 0.2);
    transform: translateY(-2px);
}

/* Stats Cards */
.about-stats-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 30px;
}

.stat-icon-wrapper {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-icon-wrapper.cyan {
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid rgba(0, 242, 254, 0.2);
    color: var(--color-cyan);
}

.stat-icon-wrapper.purple {
    background: rgba(196, 113, 237, 0.1);
    border: 1px solid rgba(196, 113, 237, 0.2);
    color: var(--color-purple);
}

.stat-icon-wrapper.blue {
    background: rgba(79, 172, 254, 0.1);
    border: 1px solid rgba(79, 172, 254, 0.2);
    color: var(--color-blue);
}

.stat-num {
    display: block;
    font-family: var(--font-mono);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

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

/* ==========================================================================
   PROJECTS SECTION
   ========================================================================== */
.filter-controls {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 50px;
}

.filter-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: var(--color-text-secondary);
    padding: 10px 24px;
    border-radius: 30px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.filter-btn:hover, .filter-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: #000;
    box-shadow: 0 0 20px rgba(0, 242, 254, 0.2);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 30px;
}

/* Interactive Project Cards with Border Mouse Tracking */
.project-card {
    padding: 36px;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(800px circle at var(--mouse-x, 0px) var(--mouse-y, 0px), rgba(0, 242, 254, 0.08), transparent 40%);
    z-index: 1;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.5s;
}

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

.project-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.project-icon-box {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.project-icon-box.cyan {
    background: rgba(0, 242, 254, 0.1);
    color: var(--color-cyan);
}

.project-icon-box.purple {
    background: rgba(196, 113, 237, 0.1);
    color: var(--color-purple);
}

.project-icon-box.blue {
    background: rgba(79, 172, 254, 0.1);
    color: var(--color-blue);
}

.project-icon-box.pink {
    background: rgba(248, 87, 166, 0.1);
    color: var(--color-pink);
}

.project-badge {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.project-title {
    font-size: 1.5rem;
    margin-bottom: 16px;
    transition: var(--transition-fast);
}

.project-card:hover .project-title {
    color: var(--color-cyan);
}

.project-desc {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin-bottom: 24px;
    flex-grow: 1;
}

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

.project-tech span {
    font-size: 0.75rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    padding: 4px 10px;
    border-radius: 4px;
    color: var(--color-text-secondary);
}

.project-links {
    margin-top: auto;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-primary);
}

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

.project-link.disabled {
    color: var(--color-text-muted);
    cursor: default;
    pointer-events: none;
}

.project-link i {
    width: 14px;
    height: 14px;
}

/* ==========================================================================
   EXPERIENCE SECTION & TIMELINE
   ========================================================================== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 40px auto 0 auto;
    padding: 20px 0;
}

/* Timeline Vertical Line */
.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 31px;
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom, var(--color-cyan), var(--color-purple), transparent);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    padding-left: 80px;
}

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

/* Dot on timeline line */
.timeline-dot {
    position: absolute;
    left: 20px;
    top: 24px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #07090e;
    border: 3px solid var(--color-cyan);
    box-shadow: 0 0 10px var(--color-cyan);
    z-index: 2;
    transition: var(--transition-normal);
}

.timeline-item:nth-child(even) .timeline-dot {
    border-color: var(--color-purple);
    box-shadow: 0 0 10px var(--color-purple);
}

.timeline-item:hover .timeline-dot {
    transform: scale(1.2);
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-cyan);
    margin-bottom: 8px;
}

.timeline-item:nth-child(even) .timeline-date {
    color: var(--color-purple);
}

.timeline-content {
    padding: 30px;
}

.timeline-title {
    font-size: 1.4rem;
    margin-bottom: 6px;
}

.timeline-subtitle {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    font-weight: 500;
}

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

/* ==========================================================================
   CERTIFICATIONS SECTION
   ========================================================================== */
.cert-filter-controls {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.cert-filter-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: var(--color-text-secondary);
    padding: 10px 24px;
    border-radius: 30px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.cert-filter-btn:hover, .cert-filter-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: #000;
    box-shadow: 0 0 20px rgba(0, 242, 254, 0.2);
}

.certs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.cert-card {
    padding: 28px;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.cert-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(600px circle at var(--mouse-x, 0px) var(--mouse-y, 0px), rgba(0, 242, 254, 0.06), transparent 40%);
    z-index: 1;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.5s;
}

.cert-card:hover::before {
    opacity: 1;
}

.cert-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.cert-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.cert-icon-wrapper {
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
}

.cert-icon-wrapper.cyan {
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid rgba(0, 242, 254, 0.2);
    color: var(--color-cyan);
}

.cert-icon-wrapper.purple {
    background: rgba(196, 113, 237, 0.1);
    border: 1px solid rgba(196, 113, 237, 0.2);
    color: var(--color-purple);
}

.cert-icon-wrapper.blue {
    background: rgba(79, 172, 254, 0.1);
    border: 1px solid rgba(79, 172, 254, 0.2);
    color: var(--color-blue);
}

.cert-icon-wrapper.pink {
    background: rgba(248, 87, 166, 0.1);
    border: 1px solid rgba(248, 87, 166, 0.2);
    color: var(--color-pink);
}

.cert-icon-wrapper i {
    width: 18px;
    height: 18px;
}

.cert-date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.cert-title {
    font-size: 1.2rem;
    margin-bottom: 8px;
    line-height: 1.3;
    transition: var(--transition-fast);
}

.cert-card:hover .cert-title {
    color: var(--color-cyan);
}

.cert-issuer {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 6px;
}

.cert-meta {
    color: var(--color-text-muted);
    font-size: 0.8rem;
    margin-bottom: 20px;
    flex-grow: 1;
}

.cert-links {
    margin-top: auto;
}

.cert-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 8px 16px;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
}

.cert-link-btn:hover {
    background: rgba(0, 242, 254, 0.08);
    border-color: rgba(0, 242, 254, 0.2);
    color: var(--color-cyan);
    transform: translateY(-2px);
}

.cert-link-btn i {
    width: 12px;
    height: 12px;
}

.cert-meta-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    padding: 4px 10px;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 40px;
}

.contact-info {
    padding: 40px;
}

.contact-desc-text {
    color: var(--color-text-secondary);
    margin-bottom: 36px;
    font-size: 1.05rem;
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 40px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.info-icon {
    width: 46px;
    height: 46px;
    border-radius: var(--border-radius-sm);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--color-cyan);
}

.info-label {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-value {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-primary);
}

a.info-value:hover {
    color: var(--color-cyan);
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-sm);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.social-link i {
    width: 18px;
    height: 18px;
}

.social-link:hover {
    background: rgba(0, 242, 254, 0.08);
    border-color: rgba(0, 242, 254, 0.2);
    color: var(--color-cyan);
    transform: translateY(-3px);
}

/* Contact Form */
.contact-form-container {
    padding: 40px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-group input, .form-group textarea {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--border-radius-sm);
    padding: 12px 16px;
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--color-cyan);
    background: rgba(255, 255, 255, 0.04);
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.1);
}

.form-feedback {
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
}

.form-feedback.success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: #34d399;
}

.form-feedback.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #f87171;
}

.hidden {
    display: none;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 40px 0;
    background: rgba(5, 7, 10, 0.8);
    position: relative;
    z-index: 10;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

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

/* ==========================================================================
   SCROLL ANIMATIONS (INTERSECTION OBSERVER CLASS)
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ==========================================================================
   RESPONSIVE MEDIA QUERIES
   ========================================================================== */
@media (max-width: 992px) {
    html {
        font-size: 15px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-description {
        margin: 0 auto 30px auto;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-graphic-container {
        max-width: 440px;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .section-padding {
        padding: 70px 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    /* Navigation Hamburger Menu */
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(7, 9, 14, 0.95);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        padding: 40px 24px;
        transition: var(--transition-normal);
        border-top: 1px solid rgba(255, 255, 255, 0.05);
    }
    
    .nav-menu.open {
        left: 0;
    }
    
    .nav-menu ul {
        flex-direction: column;
        gap: 24px;
        align-items: center;
    }
    
    .nav-link {
        font-size: 1.2rem;
    }
    
    /* Timeline adjustments */
    .timeline::before {
        left: 15px;
    }
    
    .timeline-dot {
        left: 4px;
    }
    
    .timeline-item {
        padding-left: 40px;
    }
    
    .form-group-row {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

/* ==========================================================================
   SCROLL TO TOP BUTTON
   ========================================================================== */
.scroll-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(14, 20, 35, 0.7);
    border: 1px solid rgba(0, 242, 254, 0.2);
    color: var(--color-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(15px);
    transition: opacity var(--transition-fast), transform var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.05);
}

.scroll-top-btn:hover {
    background: rgba(0, 242, 254, 0.1);
    border-color: var(--color-cyan);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 0 25px rgba(0, 242, 254, 0.25);
    color: #fff;
}

.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top-btn i {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-fast);
}

.scroll-top-btn:hover i {
    transform: translateY(-2px);
}