/* ===================================
   CSS Custom Properties (Design Tokens)
   =================================== */
:root {
    /* Colors */
    --color-bg-primary: #0a0f1a;
    --color-bg-secondary: #111827;
    --color-bg-tertiary: #1f2937;
    --color-bg-card: rgba(17, 24, 39, 0.8);

    --color-accent-primary: #06b6d4;
    --color-accent-secondary: #3b82f6;
    --color-accent-tertiary: #8b5cf6;
    --color-accent-success: #10b981;
    --color-accent-warning: #f59e0b;

    --color-text-primary: #f8fafc;
    --color-text-secondary: #94a3b8;
    --color-text-tertiary: #64748b;

    --color-border: rgba(148, 163, 184, 0.1);
    --color-border-hover: rgba(6, 182, 212, 0.3);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 50%, #8b5cf6 100%);
    --gradient-bg: linear-gradient(180deg, #0a0f1a 0%, #111827 50%, #0a0f1a 100%);
    --gradient-card: linear-gradient(145deg, rgba(17, 24, 39, 0.9), rgba(31, 41, 55, 0.6));
    --gradient-glow: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Outfit', 'Inter', sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 40px rgba(6, 182, 212, 0.3);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Layout */
    --container-max: 1200px;
    --navbar-height: 80px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--navbar-height);
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text-secondary);
    background: var(--color-bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Selection */
::selection {
    background: var(--color-accent-primary);
    color: var(--color-bg-primary);
}

/* Focus styles for accessibility */
:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
}

/* ===================================
   Typography
   =================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    color: var(--color-text-primary);
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

h4 {
    font-size: 1.125rem;
}

p {
    margin-bottom: var(--space-md);
}

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

a:hover {
    color: var(--color-accent-secondary);
}

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

/* ===================================
   Utility Classes
   =================================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.glass-card {
    background: var(--gradient-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

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

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-primary);
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-bg-primary);
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(6, 182, 212, 0.4);
    color: var(--color-bg-primary);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border: 2px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
    background: rgba(6, 182, 212, 0.1);
}

.btn-outline {
    background: transparent;
    color: var(--color-accent-primary);
    border: 2px solid var(--color-accent-primary);
}

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

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    z-index: 1000;
    background: rgba(10, 15, 26, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(10, 15, 26, 0.95);
    box-shadow: var(--shadow-lg);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

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

.logo-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-sm);
}

.nav-link {
    display: block;
    padding: var(--space-sm) var(--space-md);
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 0.9375rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-accent-primary);
    background: rgba(6, 182, 212, 0.1);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.hamburger {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    position: relative;
    transition: all var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    bottom: -8px;
}

.nav-toggle.active .hamburger {
    background: transparent;
}

.nav-toggle.active .hamburger::before {
    transform: rotate(45deg);
    top: 0;
}

.nav-toggle.active .hamburger::after {
    transform: rotate(-45deg);
    bottom: 0;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: calc(var(--navbar-height) + var(--space-2xl)) var(--space-xl) var(--space-2xl);
}

.hero-particles {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 80%, rgba(6, 182, 212, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(139, 92, 246, 0.02) 0%, transparent 50%);
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: var(--gradient-glow);
    opacity: 0.5;
}

.hero-content {
    text-align: center;
    z-index: 1;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-image-wrapper {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto var(--space-xl);
}

.hero-image {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--color-bg-tertiary);
    position: relative;
    z-index: 2;
}

.hero-image-glow {
    position: absolute;
    inset: -10px;
    background: var(--gradient-primary);
    border-radius: 50%;
    opacity: 0.5;
    filter: blur(20px);
    animation: glow 3s ease-in-out infinite;
}

@keyframes glow {

    0%,
    100% {
        opacity: 0.3;
        transform: scale(1);
    }

    50% {
        opacity: 0.6;
        transform: scale(1.05);
    }
}

.hero-image-ring {
    position: absolute;
    inset: -15px;
    border: 2px solid var(--color-accent-primary);
    border-radius: 50%;
    opacity: 0.3;
    animation: spin 20s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.hero-greeting {
    font-size: 1.125rem;
    color: var(--color-accent-primary);
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 3px;
    font-weight: 500;
}

.hero-name {
    margin-bottom: var(--space-md);
}

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

.hero-title {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.hero-tagline {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: var(--radius-full);
    color: var(--color-accent-primary);
    font-size: 0.9375rem;
    margin-bottom: var(--space-xl);
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-xl);
}

.hero-social {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    font-size: 1.25rem;
    border: 1px solid var(--color-border);
    transition: all var(--transition-normal);
}

.social-link:hover {
    background: var(--color-accent-primary);
    color: var(--color-bg-primary);
    border-color: var(--color-accent-primary);
    transform: translateY(-3px);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-tertiary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    animation: bounce 2s infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    50% {
        transform: translateX(-50%) translateY(10px);
    }
}

.scroll-mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-text-tertiary);
    border-radius: 12px;
    position: relative;
}

.scroll-wheel {
    width: 4px;
    height: 8px;
    background: var(--color-accent-primary);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes scroll {

    0%,
    100% {
        top: 6px;
        opacity: 1;
    }

    50% {
        top: 16px;
        opacity: 0.3;
    }
}

/* ===================================
   Section Styles
   =================================== */
.section {
    padding: var(--space-4xl) 0;
    position: relative;
}

.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: var(--radius-full);
    color: var(--color-accent-primary);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--space-md);
}

.section-title {
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-tertiary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===================================
   About Section
   =================================== */
.about-card {
    padding: var(--space-2xl);
    max-width: 800px;
    margin: 0 auto;
}

.about-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--color-bg-primary);
    margin-bottom: var(--space-lg);
}

.about-text {
    font-size: 1.0625rem;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ===================================
   Timeline (Experience)
   =================================== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-primary);
    opacity: 0.3;
}

.timeline-item {
    position: relative;
    padding-left: 80px;
    padding-bottom: var(--space-2xl);
}

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

.timeline-marker {
    position: absolute;
    left: 10px;
    top: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-bg-primary);
    font-size: 1rem;
    box-shadow: 0 0 20px rgba(6, 182, 212, 0.3);
}

.timeline-content {
    padding: var(--space-lg);
}

.timeline-header {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    align-items: center;
    margin-bottom: var(--space-sm);
}

.timeline-title {
    font-size: 1.25rem;
    color: var(--color-text-primary);
}

.timeline-company {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
    color: var(--color-accent-primary);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(6, 182, 212, 0.1);
    border-radius: var(--radius-sm);
}

.timeline-date {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-md);
}

.timeline-description {
    margin-bottom: var(--space-md);
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.tag {
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

/* ===================================
   Education Grid
   =================================== */
.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.education-card {
    padding: var(--space-xl);
    text-align: center;
    position: relative;
}

.education-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    background: var(--color-bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--color-accent-primary);
    margin: 0 auto var(--space-lg);
    border: 1px solid var(--color-border);
}

.education-badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    padding: var(--space-xs) var(--space-sm);
    background: var(--gradient-primary);
    color: var(--color-bg-primary);
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: var(--radius-sm);
}

.education-badge.minor {
    background: var(--color-accent-secondary);
}

.education-badge.associate {
    background: var(--color-accent-tertiary);
}

.education-degree {
    font-size: 1.125rem;
    margin-bottom: var(--space-xs);
}

.education-field {
    color: var(--color-accent-primary);
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.education-school {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-sm);
}

.education-date {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
}

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

.project-card {
    position: relative;
    overflow: hidden;
}

.project-card.featured {
    grid-column: span 1;
}

.project-featured-badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    background: var(--gradient-primary);
    color: var(--color-bg-primary);
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: var(--radius-sm);
    z-index: 10;
}

.project-image {
    position: relative;
    height: 180px;
    overflow: hidden;
}

.project-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    background: linear-gradient(145deg, var(--color-bg-secondary), var(--color-bg-tertiary));
    color: var(--color-accent-primary);
}

.project-image-placeholder.security {
    background: linear-gradient(145deg, #1a1a2e, #16213e);
    color: #e94560;
}

.project-image-placeholder.game {
    background: linear-gradient(145deg, #2a1a4a, #1a1a3e);
    color: #bd93f9;
}

.project-image-placeholder.web {
    background: linear-gradient(145deg, #1a2a1a, #1a3e1a);
    color: #50fa7b;
}

.project-image-placeholder.github {
    background: linear-gradient(145deg, #1a1a1a, #2a2a2a);
    color: #f8f8f2;
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(10, 15, 26, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.project-link {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-accent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-bg-primary);
    font-size: 1.25rem;
    transition: transform var(--transition-fast);
}

.project-link:hover {
    transform: scale(1.1);
    color: var(--color-bg-primary);
}

.project-content {
    padding: var(--space-lg);
}

.project-title {
    font-size: 1.125rem;
    margin-bottom: var(--space-xs);
}

.project-date {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-sm);
}

.project-description {
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

/* ===================================
   Certifications Grid
   =================================== */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.cert-card {
    padding: var(--space-xl);
    text-align: center;
}

.cert-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto var(--space-lg);
}

.cert-icon.google {
    background: linear-gradient(145deg, #4285f4, #34a853);
    color: white;
}

.cert-icon.btk {
    background: linear-gradient(145deg, #1a237e, #303f9f);
    color: white;
}

.cert-icon.tryhackme {
    background: linear-gradient(145deg, #212c42, #1c2538);
    color: #88cc14;
}

.cert-title {
    font-size: 1rem;
    margin-bottom: var(--space-xs);
}

.cert-issuer {
    color: var(--color-accent-primary);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.cert-date {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
}

.cert-date.ongoing {
    background: rgba(16, 185, 129, 0.2);
    color: var(--color-accent-success);
}

.cert-description {
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: var(--space-sm);
}

.cert-id {
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    font-family: monospace;
}

/* ===================================
   Skills Section
   =================================== */
.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-xl);
}

.skills-category {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.skills-category-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.125rem;
    color: var(--color-accent-primary);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border);
}

.skills-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.skill-item {
    width: 100%;
}

.skill-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.skill-name {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 500;
    color: var(--color-text-primary);
}

.skill-name i {
    color: var(--color-accent-primary);
    width: 20px;
    text-align: center;
}

.skill-level {
    font-size: 0.875rem;
    color: var(--color-accent-primary);
    font-weight: 600;
}

.skill-bar {
    height: 8px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}


.languages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-lg);
}

.language-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.language-flag {
    font-size: 2rem;
}

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

.language-level {
    font-size: 0.75rem;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.language-level.native {
    background: rgba(16, 185, 129, 0.2);
    color: var(--color-accent-success);
}

.language-level.advanced {
    background: rgba(6, 182, 212, 0.2);
    color: var(--color-accent-primary);
}

/* ===================================
   Interests Section
   =================================== */
.interests-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.interest-card {
    padding: var(--space-xl);
    text-align: center;
}

.interest-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--color-bg-primary);
    margin: 0 auto var(--space-lg);
    box-shadow: 0 0 30px rgba(6, 182, 212, 0.3);
}

.interest-title {
    font-size: 1.125rem;
    margin-bottom: var(--space-sm);
}

.interest-description {
    font-size: 0.9375rem;
    line-height: 1.7;
    margin: 0;
}

/* ===================================
   Training Section
   =================================== */
.training-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    max-width: 800px;
    margin: 0 auto;
}

.training-item {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg);
}

.training-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    border-radius: var(--radius-lg);
    background: var(--color-bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--color-accent-primary);
    border: 1px solid var(--color-border);
}

.training-content {
    flex: 1;
}

.training-title {
    font-size: 1.0625rem;
    margin-bottom: var(--space-xs);
}

.training-issuer {
    font-size: 0.875rem;
    color: var(--color-accent-primary);
    margin-bottom: var(--space-sm);
}

.training-description {
    font-size: 0.9375rem;
    margin: 0;
}

/* ===================================
   References Section
   =================================== */
.references-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-lg);
}

.reference-card {
    padding: var(--space-xl);
}

.reference-quote {
    position: relative;
    margin-bottom: var(--space-xl);
}

.reference-quote i {
    position: absolute;
    top: -10px;
    left: -10px;
    font-size: 2rem;
    color: var(--color-accent-primary);
    opacity: 0.3;
}

.reference-quote p {
    font-size: 1.0625rem;
    font-style: italic;
    line-height: 1.8;
    color: var(--color-text-secondary);
    padding-left: var(--space-lg);
    margin: 0;
}

.reference-author {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.reference-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--color-bg-primary);
}

.reference-info {
    flex: 1;
}

.reference-name {
    font-size: 1rem;
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
}

.reference-title {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-xs);
}

.reference-email {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
    color: var(--color-accent-primary);
}

/* Simple reference card (no quote) */
.reference-card.simple {
    max-width: 500px;
}

.reference-card.simple .reference-author {
    padding-top: 0;
    border-top: none;
}

/* ===================================
   Contact Section
   =================================== */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-2xl);
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.contact-item {
    display: flex;
    gap: var(--space-md);
}

.contact-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--color-bg-primary);
    flex-shrink: 0;
}

.contact-details h3 {
    font-size: 1rem;
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
}

.contact-details a,
.contact-details p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin: 0;
}

.contact-social h3 {
    font-size: 1rem;
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
}

.social-links {
    display: flex;
    gap: var(--space-md);
}

.social-btn {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all var(--transition-normal);
    border: 1px solid var(--color-border);
}

.social-btn.github {
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
}

.social-btn.github:hover {
    background: #333;
    border-color: #333;
    color: white;
}

.social-btn.linkedin {
    background: var(--color-bg-secondary);
    color: #0077b5;
}

.social-btn.linkedin:hover {
    background: #0077b5;
    border-color: #0077b5;
    color: white;
}

.social-btn.twitter {
    background: var(--color-bg-secondary);
    color: #1da1f2;
}

.social-btn.twitter:hover {
    background: #1da1f2;
    border-color: #1da1f2;
    color: white;
}

/* Contact Form */
.contact-form {
    padding: var(--space-xl);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-md);
    font-family: var(--font-primary);
    font-size: 1rem;
    color: var(--color-text-primary);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    width: 100%;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-xl);
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.footer-tagline {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    margin-top: var(--space-xs);
}

.footer-links {
    display: flex;
    gap: var(--space-lg);
}

.footer-links a {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-accent-primary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    margin: 0;
}

.footer-credit i {
    color: var(--color-accent-primary);
}

/* ===================================
   Back to Top Button
   =================================== */
.back-to-top {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: var(--color-bg-primary);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: 1000;
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
}

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

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(6, 182, 212, 0.4);
}

/* ===================================
   Animations
   =================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    .contact-container {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {
    :root {
        --navbar-height: 70px;
    }

    .container {
        padding: 0 var(--space-md);
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: var(--navbar-height);
        left: 0;
        right: 0;
        background: rgba(10, 15, 26, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-sm);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        border-bottom: 1px solid var(--color-border);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        padding: var(--space-md);
        text-align: center;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        padding-left: 60px;
    }

    .timeline-marker {
        left: 0;
        width: 40px;
        height: 40px;
    }

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

    .skills-container {
        grid-template-columns: 1fr;
    }

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

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .section {
        padding: var(--space-3xl) 0;
    }

    .hero-image-wrapper {
        width: 160px;
        height: 160px;
    }

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

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

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

    .training-item {
        flex-direction: column;
        text-align: center;
    }

    .training-icon {
        margin: 0 auto;
    }

    .contact-item {
        flex-direction: column;
        text-align: center;
    }

    .contact-icon {
        margin: 0 auto;
    }

    .social-links {
        justify-content: center;
    }

    .back-to-top {
        bottom: var(--space-md);
        right: var(--space-md);
        width: 40px;
        height: 40px;
    }
}