/* ========================================
   CSS CUSTOM PROPERTIES (Variables)
   - Define colors, fonts, spacing once
   - Easy to change theme later
======================================== */
:root {
    /* Colors - Dark theme with neon accents */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: rgba(26, 26, 37, 0.6);
    
    /* Accent colors - Web3/Blockchain vibes */
    --accent-primary: #8b5cf6;      /* Purple */
    --accent-secondary: #06b6d4;    /* Cyan */
    --accent-tertiary: #10b981;     /* Green */
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 100%);
    --gradient-text: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 50%, #10b981 100%);
    --gradient-glow: linear-gradient(135deg, rgba(139, 92, 246, 0.3) 0%, rgba(6, 182, 212, 0.3) 100%);
    
    /* Text colors */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', sans-serif;
    
    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;
    --container-padding: 0 24px;
    
    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.3);
}

/* ========================================
   CSS RESET & BASE STYLES
   - Remove browser defaults
   - Set consistent baseline
======================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Container utility */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: var(--container-padding);
}

/* Section base */
.section {
    padding: var(--section-padding);
    position: relative;
}

/* ========================================
   NAVIGATION BAR
   - Fixed at top
   - Glassmorphism effect
======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-normal);
}

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(10, 10, 15, 0.95);
}

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

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

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

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 10px 16px;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-link.nav-cta {
    background: var(--gradient-primary);
    color: white;
    padding: 10px 20px;
}

.nav-link.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* Mobile menu toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

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

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

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

/* Mobile menu open state */
.nav-toggle.active .hamburger {
    background: transparent;
}

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

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

/* ========================================
   HERO SECTION
   - Full viewport height
   - Animated background
======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 120px 24px 80px;
    overflow: hidden;
}

/* Background grid effect */
.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
}

.hero-grid {
    position: absolute;
    inset: -50%;
    background-image: 
        linear-gradient(rgba(139, 92, 246, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(139, 92, 246, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(50px, 50px) rotate(0deg); }
}

/* Gradient orbs */
.hero-bg::before {
    content: '';
    position: absolute;
    top: 10%;
    left: 10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
    filter: blur(60px);
    animation: float 8s ease-in-out infinite;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: 10%;
    right: 10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
    filter: blur(60px);
    animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -30px); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
}

/* Availability badge */
.availability-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--accent-tertiary);
    margin-bottom: 32px;
    animation: fadeInDown 0.6s ease;
}

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

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.5); opacity: 0.5; }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Hero name */
.hero-name {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 16px;
    animation: fadeInUp 0.6s ease 0.1s backwards;
}

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

/* Typewriter title */
.hero-title {
    font-family: var(--font-display);
    font-size: clamp(1.25rem, 4vw, 1.75rem);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 24px;
    min-height: 2em;
    animation: fadeInUp 0.6s ease 0.2s backwards;
}

.typewriter {
    color: var(--accent-secondary);
}

.cursor {
    color: var(--accent-primary);
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Hero description */
.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    animation: fadeInUp 0.6s ease 0.3s backwards;
}

/* Hero buttons */
.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
    animation: fadeInUp 0.6s ease 0.4s backwards;
}

/* Button styles */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: var(--transition-normal);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-large {
    padding: 18px 36px;
    font-size: 1.1rem;
}

/* Hero stats */
.hero-stats {
    display: flex;
    gap: 48px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease 0.5s backwards;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-tertiary);
    font-size: 0.75rem;
    animation: fadeInUp 0.6s ease 0.6s backwards;
}

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

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

@keyframes scroll {
    0%, 100% { opacity: 1; transform: translateX(-50%) translateY(0); }
    50% { opacity: 0.5; transform: translateX(-50%) translateY(10px); }
}

/* ========================================
   SECTION TITLES
======================================== */
.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 60px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.title-number {
    font-size: 1rem;
    font-weight: 500;
    color: var(--accent-primary);
}

.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, rgba(139, 92, 246, 0.3), transparent);
    max-width: 300px;
}

/* ========================================
   ABOUT SECTION
======================================== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 60px;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.about-intro {
    font-size: 1.25rem;
    color: var(--text-primary) !important;
}

.about-text .highlight {
    color: var(--accent-secondary);
    font-weight: 500;
}

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

.company-name {
    color: var(--accent-primary);
    font-weight: 600;
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 32px;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
    backdrop-filter: blur(10px);
}

.highlight-icon {
    font-size: 1.25rem;
}

/* About image */
.about-image {
    position: sticky;
    top: 120px;
    max-width: 280px;
}

.image-frame {
    position: relative;
    width: 280px;
    height: 280px;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.placeholder-text {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 700;
    color: white;
}

/* Profile image */
.profile-image {
    width: 280px;
    height: 280px;
    object-fit: cover;
    object-position: center top;
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    border: 3px solid var(--accent-primary);
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.3);
}

.profile-image:hover {
    transform: scale(1.02);
    box-shadow: 0 0 50px rgba(139, 92, 246, 0.5);
}

.frame-border {
    position: absolute;
    inset: -8px;
    border: 2px solid var(--accent-primary);
    border-radius: var(--radius-lg);
    transform: translate(12px, 12px);
    z-index: -1;
    pointer-events: none;
}

/* ========================================
   SKILLS SECTION
======================================== */
.skills {
    background: var(--bg-secondary);
}

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

.skill-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: 32px;
    backdrop-filter: blur(10px);
    transition: var(--transition-normal);
}

.skill-card:hover {
    transform: translateY(-5px);
    border-color: rgba(139, 92, 246, 0.3);
    box-shadow: var(--shadow-glow);
}

.skill-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.skill-category {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.skill-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-list li {
    padding: 6px 14px;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.skill-list li:hover {
    background: rgba(139, 92, 246, 0.2);
    color: var(--text-primary);
}

/* ========================================
   EXPERIENCE SECTION
======================================== */
.timeline {
    position: relative;
    max-width: 900px;
}

.timeline-item {
    display: grid;
    grid-template-columns: 32px 1fr;
    gap: 32px;
    margin-bottom: 48px;
}

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

.timeline-marker {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.marker-dot {
    width: 16px;
    height: 16px;
    background: var(--gradient-primary);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.5);
}

.marker-line {
    width: 2px;
    flex: 1;
    background: linear-gradient(to bottom, rgba(139, 92, 246, 0.5), transparent);
    margin-top: 8px;
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: 32px;
    backdrop-filter: blur(10px);
    transition: var(--transition-normal);
}

.timeline-content:hover {
    border-color: rgba(139, 92, 246, 0.2);
}

.timeline-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 8px;
}

.job-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.job-type {
    padding: 4px 12px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.job-company {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.company {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 1rem;
}

.job-period {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.job-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.job-achievements {
    list-style: none;
    margin-bottom: 20px;
}

.job-achievements li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.job-achievements li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-secondary);
}

.job-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-tag {
    padding: 4px 12px;
    background: rgba(6, 182, 212, 0.1);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    color: var(--accent-secondary);
}

/* ========================================
   PROJECTS SECTION
======================================== */
.projects {
    background: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

/* Featured project - full width */
.project-card.featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: 40px;
    backdrop-filter: blur(10px);
}

.project-image {
    border-radius: var(--radius-md);
    overflow: hidden;
}

.project-placeholder {
    width: 100%;
    aspect-ratio: 16/10;
    background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-primary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    border-radius: var(--radius-md);
}

.project-label {
    font-size: 0.8rem;
    color: var(--accent-tertiary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.project-content .project-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.project-tech span {
    padding: 4px 12px;
    background: rgba(139, 92, 246, 0.1);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    color: var(--accent-primary);
}

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

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

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

/* Regular project cards */
.project-card:not(.featured) {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: 32px;
    backdrop-filter: blur(10px);
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.project-card:not(.featured):hover {
    transform: translateY(-5px);
    border-color: rgba(139, 92, 246, 0.3);
}

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

.project-icon {
    font-size: 2rem;
}

.project-links-small a {
    color: var(--text-tertiary);
    transition: var(--transition-fast);
}

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

.project-card:not(.featured) .project-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.project-card:not(.featured) .project-description {
    font-size: 0.9rem;
    flex: 1;
}

.project-card:not(.featured) .project-tech {
    margin-bottom: 0;
    margin-top: auto;
}

/* Projects CTA */
.projects-cta {
    text-align: center;
    margin-top: 48px;
}

/* Upcoming Projects Section */
.upcoming-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-top: 60px;
    margin-bottom: 24px;
    text-align: center;
    position: relative;
}

.upcoming-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    margin: 12px auto 0;
    border-radius: 2px;
}

.upcoming-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.upcoming-card {
    background: linear-gradient(135deg, rgba(26, 26, 37, 0.8), rgba(18, 18, 26, 0.9));
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-lg);
    padding: 28px;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.upcoming-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

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

.upcoming-card:hover {
    transform: translateY(-8px);
    border-color: rgba(139, 92, 246, 0.5);
    box-shadow: 0 20px 40px rgba(139, 92, 246, 0.15),
                0 0 60px rgba(139, 92, 246, 0.1);
}

.upcoming-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.upcoming-card:nth-child(2) .upcoming-icon {
    animation-delay: 0.5s;
}

.upcoming-card:nth-child(3) .upcoming-icon {
    animation-delay: 1s;
}

.upcoming-card h4 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 12px;
    font-weight: 600;
}

.upcoming-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.upcoming-tech {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
}

.upcoming-tech span {
    padding: 4px 12px;
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--accent-secondary);
    transition: all 0.3s ease;
}

.upcoming-card:hover .upcoming-tech span {
    background: rgba(6, 182, 212, 0.2);
    border-color: rgba(6, 182, 212, 0.4);
}

/* Enhanced project card animations */
.project-card.featured {
    position: relative;
    overflow: hidden;
    transition: all 0.4s ease;
}

.project-card.featured::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, rgba(139, 92, 246, 0.1), transparent 30%);
    animation: rotate 8s linear infinite;
    opacity: 0;
    transition: opacity 0.4s ease;
}

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

@keyframes rotate {
    100% { transform: rotate(360deg); }
}

.project-card.featured:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 50px rgba(139, 92, 246, 0.2);
}

.project-placeholder {
    transition: transform 0.4s ease;
}

.project-card.featured:hover .project-placeholder {
    transform: scale(1.05);
}

/* Stagger animation for project cards */
.project-card:not(.featured) {
    opacity: 0;
    animation: fadeSlideUp 0.6s ease forwards;
}

.project-card:not(.featured):nth-child(2) { animation-delay: 0.1s; }
.project-card:not(.featured):nth-child(3) { animation-delay: 0.2s; }
.project-card:not(.featured):nth-child(4) { animation-delay: 0.3s; }
.project-card:not(.featured):nth-child(5) { animation-delay: 0.4s; }

@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive for upcoming grid */
@media (max-width: 900px) {
    .upcoming-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   EDUCATION SECTION
======================================== */
.education-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.education-card,
.certifications-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: 32px;
    backdrop-filter: blur(10px);
}

.edu-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.education-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.edu-field {
    color: var(--accent-primary);
    font-weight: 500;
    margin-bottom: 4px;
}

.edu-school {
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.edu-period {
    color: var(--text-tertiary);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.edu-grade {
    color: var(--accent-tertiary);
    font-weight: 600;
}

.certifications-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.cert-list {
    list-style: none;
}

.cert-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.cert-list li:last-child {
    border-bottom: none;
}

.cert-icon {
    font-size: 1.25rem;
}

/* ========================================
   CONTACT SECTION
======================================== */
.contact {
    background: var(--bg-secondary);
}

.contact-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.contact-intro {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.contact-intro .highlight {
    color: var(--accent-secondary);
    font-weight: 500;
}

.contact-highlights {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.contact-highlight {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.contact-highlight span:first-child {
    font-size: 1.25rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    margin-top: 40px;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
}

.contact-link:hover {
    color: var(--accent-primary);
    background: rgba(139, 92, 246, 0.1);
}

/* ========================================
   FOOTER
======================================== */
.footer {
    padding: 40px 24px;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

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

/* ========================================
   ANIMATIONS - Scroll reveal
======================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========================================
   RESPONSIVE DESIGN
   - Breakpoints for different screens
======================================== */

/* Tablet and below */
@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        order: -1;
        max-width: 300px;
        margin: 0 auto;
        position: static;
    }
    
    .project-card.featured {
        grid-template-columns: 1fr;
    }
    
    .education-grid {
        grid-template-columns: 1fr;
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --section-padding: 80px 0;
    }
    
    /* Mobile navigation */
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: var(--bg-primary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 24px;
        transition: var(--transition-normal);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-link {
        font-size: 1.25rem;
    }
    
    .nav-toggle {
        display: block;
        z-index: 1001;
    }
    
    /* Hero adjustments */
    .hero {
        padding: 100px 24px 60px;
    }
    
    .hero-stats {
        gap: 24px;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    /* About */
    .about-highlights {
        grid-template-columns: 1fr;
    }
    
    /* Timeline */
    .timeline-item {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .timeline-marker {
        flex-direction: row;
        margin-bottom: 8px;
    }
    
    .marker-line {
        width: auto;
        height: 2px;
        flex: 1;
        margin-top: 0;
        margin-left: 8px;
    }
    
    .timeline-header {
        flex-direction: column;
    }
    
    /* Projects */
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .project-card.featured {
        padding: 24px;
    }
    
    /* Contact */
    .contact-highlights {
        flex-direction: column;
        gap: 16px;
    }
    
    .contact-links {
        flex-direction: column;
        align-items: center;
    }
}

/* Small mobile */
@media (max-width: 480px) {
    .section-title {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .section-title::after {
        display: none;
    }
    
    .hero-name {
        font-size: 2rem;
    }
}