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

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #0a0a0a;
    color: #ffffff;
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ============================================
   CUSTOM PROPERTIES
   ============================================ */

:root {
    /* Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    
    /* Gradient Colors */
    --gradient-primary: linear-gradient(135deg, #7c3aed 0%, #3b82f6 100%);
    --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #14b8a6 100%);
    --gradient-text: linear-gradient(135deg, #a78bfa 0%, #60a5fa 100%);
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    
    /* Border Colors */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 255, 255, 0.2);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   NAVIGATION
   ============================================ */

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

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

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

.nav-logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 0.5rem 0;
}

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

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
    background: transparent;
    border: none;
    cursor: pointer;
}

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

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

.hamburger::before {
    transform: translateY(-8px);
}

.hamburger::after {
    transform: translateY(8px);
}

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

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

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

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

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    padding: var(--spacing-xl) var(--spacing-md);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    z-index: -2;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(124, 58, 237, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(6, 182, 212, 0.05) 0%, transparent 70%);
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -30px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

.hero-content {
    text-align: center;
    max-width: 800px;
    z-index: 1;
}

.hero-greeting {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 1rem;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.hero-title {
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 0.5rem;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 2rem);
    font-weight: 300;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2.5rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.btn:hover::before {
    opacity: 1;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(124, 58, 237, 0.4);
}

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

.btn-secondary:hover {
    border-color: #7c3aed;
    color: #7c3aed;
    transform: translateY(-2px);
}

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

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

/* ============================================
   HOBBIES SECTION
   ============================================ */

.hobbies-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.hobby-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.hobby-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.hobby-summary {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    cursor: pointer;
    list-style: none;
    user-select: none;
}

.hobby-summary::-webkit-details-marker {
    display: none;
}

.hobby-icon {
    font-size: 2.5rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(124, 58, 237, 0.1);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.hobby-info {
    flex: 1;
}

.hobby-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

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

.hobby-content {
    padding: 0 1.5rem 1.5rem;
    border-top: 1px solid var(--border-color);
}

.hobby-text {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.hobby-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

.tag {
    background: rgba(124, 58, 237, 0.2);
    color: #a78bfa;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
}

.hobby-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: #60a5fa;
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.hobby-link:hover {
    color: #93c5fd;
}

.packed-gallery {
    column-count: 4;
    column-gap: 8px;
}

.packed-gallery img {
    width: 100%;
    margin-bottom: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.packed-gallery img:hover {
    transform: scale(1.02);
    opacity: 0.9;
}

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

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all var(--transition-normal);
}

.skill-category:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.skill-category-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 1rem;
}

.tool-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem 1rem;
    text-align: center;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.tool-card:hover {
    border-color: #7c3aed;
    transform: translateY(-4px);
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.2);
}

.tool-card img {
    width: 50px;
    height: 50px;
    object-fit: contain;
    filter: brightness(0.9);
    transition: filter var(--transition-normal);
}

.tool-card:hover img {
    filter: brightness(1);
}

.tool-name {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ============================================
   EXAMPLES OF WORK SECTION
   ============================================ */

.work-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.work-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.work-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.work-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.work-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.work-icon svg {
    color: white;
    width: 24px;
    height: 24px;
}

.work-info {
    flex: 1;
}

.work-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

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

.work-embed {
    padding: 1.5rem;
    background: rgba(0, 0, 0, 0.2);
}

.pdf-embed {
    position: relative;
    width: 100%;
    aspect-ratio: 16/10;
    background: #1a1a1a;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.pdf-embed iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.work-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
}

.work-download {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: #60a5fa;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.work-download:hover {
    background: rgba(96, 165, 250, 0.1);
    color: #93c5fd;
}

.work-download svg {
    width: 16px;
    height: 16px;
}

/* ============================================
   RESUME SECTION
   ============================================ */

.resume-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.resume-embed {
    position: relative;
    width: 100%;
    aspect-ratio: 21/29.7;
    background: #1a1a1a;
    max-height: 85vh;
}

.resume-embed iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.resume-actions {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.resume-actions .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* ============================================
   AWARDS SECTION
   ============================================ */

.awards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.award-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    display: flex;
    gap: 1.5rem;
    transition: all var(--transition-normal);
}

.award-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(124, 58, 237, 0.2);
}

.award-icon {
    width: 80px;
    height: 80px;
    background: rgba(124, 58, 237, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.award-icon img {
    width: 60px;
    height: 60px;
    object-fit: contain;
}

.award-content {
    flex: 1;
}

.award-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.award-organization {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.award-description {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

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

.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0;
    margin-top: var(--spacing-xl);
}

.footer-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-subtitle {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-normal);
}

.contact-card:hover {
    border-color: #7c3aed;
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(124, 58, 237, 0.2);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.contact-icon svg {
    color: white;
    width: 28px;
    height: 28px;
}

.contact-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.contact-link {
    color: #60a5fa;
    font-weight: 500;
    word-break: break-all;
}

.contact-link:hover {
    color: #93c5fd;
}

/* ============================================
   ANIMATIONS
   ============================================ */

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

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

/* Stagger animations for hero */
.hero-content .fade-in:nth-child(1) { transition-delay: 0.1s; }
.hero-content .fade-in:nth-child(2) { transition-delay: 0.2s; }
.hero-content .fade-in:nth-child(3) { transition-delay: 0.3s; }
.hero-content .fade-in:nth-child(4) { transition-delay: 0.4s; }
.hero-content .fade-in:nth-child(5) { transition-delay: 0.5s; }

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 10, 0.98);
        flex-direction: column;
        align-items: center;
        padding: 2rem;
        gap: 1.5rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        border-bottom: 1px solid var(--border-color);
    }

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

    .nav-toggle {
        display: flex;
    }

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

    .btn {
        width: 100%;
    }

    .award-card {
        flex-direction: column;
        text-align: center;
    }

    .award-icon {
        margin: 0 auto;
    }

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

    .work-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .pdf-embed {
        aspect-ratio: 4/3;
    }

    .resume-embed {
        aspect-ratio: 4/5.6;
    }

    .hobby-summary {
        flex-direction: column;
        text-align: center;
    }

    .packed-gallery {
        column-count: 2;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .section {
        padding: var(--spacing-lg) 0;
    }

    .hero {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

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

    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-content {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
a:focus-visible,
button:focus-visible {
    outline: 2px solid #7c3aed;
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: rgba(255, 255, 255, 0.3);
        --text-secondary: #d4d4d8;
    }
}