/* ===================================
   CSS Variables & Reset
   =================================== */
:root {
    /* Colors */
    --color-bg: #0a0a0a;
    --color-text: #ffffff;
    --color-text-muted: #999999;
    --color-accent: #4a9eff;
    --color-accent-green: #6bff8f;
    --color-border: #1a1a1a;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-black: 900;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-2xl: 8rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s ease;
    --transition-slow: 0.6s ease;
}

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

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

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

a {
    color: inherit;
    text-decoration: none;
}

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

/* ===================================
   Loading Screen
   =================================== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

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

.loading-text {
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.2em;
    margin-bottom: 1rem;
    color: var(--color-text-muted);
}

.loading-bar {
    width: 200px;
    height: 2px;
    background-color: var(--color-border);
    margin: 0 auto 1rem;
    overflow: hidden;
}

.loading-progress {
    height: 100%;
    background-color: var(--color-accent);
    width: 0%;
    transition: width 0.3s ease;
}

.loading-percent {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
}

/* ===================================
   Navigation
   =================================== */
.nav-main {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 2rem 3rem;
    z-index: 1000;
    background: linear-gradient(180deg, rgba(10, 10, 10, 0.95) 0%, rgba(10, 10, 10, 0) 100%);
    backdrop-filter: blur(10px);
    transition: all var(--transition-medium);
}

.nav-main.scrolled {
    padding: 1rem 3rem;
    background: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1800px;
    margin: 0 auto;
}

.nav-logo {
    font-size: 1rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
    transition: opacity var(--transition-fast);
}

.nav-logo:hover {
    opacity: 0.7;
}

.nav-logo span {
    font-weight: var(--font-weight-light);
}

.nav-links {
    display: flex;
    gap: 3rem;
}

.nav-link {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    transition: opacity var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    opacity: 0.7;
}

.nav-number {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-weight: var(--font-weight-medium);
}

.nav-label {
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
}

.nav-social {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.social-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-weight: var(--font-weight-medium);
}

.social-link {
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.05em;
    transition: color var(--transition-fast);
}

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

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 8rem 3rem 0 3rem;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 2;
    animation: fadeInUp 1s ease 0.3s both;
}

.hero-subtitle {
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
}

.hero-title {
    font-size: clamp(4rem, 12vw, 10rem);
    font-weight: var(--font-weight-black);
    line-height: 0.95;
    letter-spacing: -0.03em;
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-title-line {
    display: block;
}

.hero-title-and {
    font-size: clamp(2rem, 6vw, 5rem);
    font-weight: var(--font-weight-light);
    margin: 0.5rem 0;
    color: var(--color-text-muted);
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.5rem);
    font-weight: var(--font-weight-light);
    color: var(--color-text-muted);
    margin-bottom: 4rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.hero-scroll {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.2em;
    padding: 1rem 2rem;
    border: 1px solid var(--color-border);
    border-radius: 50px;
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.hero-scroll::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--color-accent);
    transform: translate(-50%, -50%);
    transition: width var(--transition-medium), height var(--transition-medium);
    z-index: -1;
    opacity: 0.1;
}

.hero-scroll:hover::before {
    width: 300px;
    height: 300px;
}

.hero-scroll:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.hero-background {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
    opacity: 0.03;
    pointer-events: none;
}

.hero-bg-text {
    font-size: clamp(10rem, 30vw, 25rem);
    font-weight: var(--font-weight-black);
    white-space: nowrap;
    animation: float 20s ease-in-out infinite;
}

/* ===================================
   Section Utilities
   =================================== */
.section-label {
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.2em;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: var(--font-weight-bold);
    margin-bottom: 4rem;
}

.section-header {
    text-align: center;
    margin-bottom: 6rem;
}

/* ===================================
   Projects Section
   =================================== */
.projects {
    padding: var(--spacing-2xl) 3rem;
    max-width: 1800px;
    margin: 0 auto;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 3rem;
}

.project-card {
    display: block;
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    transition: transform var(--transition-medium);
    cursor: pointer;
}

.project-card:hover {
    transform: translateY(-8px);
}

.project-image {
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    aspect-ratio: 4/3;
    background-color: var(--color-border);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.project-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, var(--color-accent) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-medium);
    pointer-events: none;
    mix-blend-mode: overlay;
}

.project-card:hover::after {
    opacity: 0.3;
}

.project-info {
    padding: 1.5rem 0;
}

.project-client {
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
}

.project-title {
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.project-tag {
    font-size: 0.625rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

/* ===================================
   About Section
   =================================== */
.about {
    padding: var(--spacing-2xl) 3rem;
    max-width: 1400px;
    margin: 0 auto;
}

.about-intro {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.about-headline {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: var(--font-weight-semibold);
    line-height: 1.3;
    margin-bottom: 2rem;
}

.about-description {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.8;
}

.scroll-indicator {
    margin-top: 3rem;
}

.about-profile {
    margin-bottom: var(--spacing-2xl);
    text-align: center;
}

.about-profile-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: var(--font-weight-semibold);
    line-height: 1.4;
    margin-bottom: 2rem;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.about-profile-text {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ===================================
   Experience Section
   =================================== */
.experience {
    margin-bottom: var(--spacing-2xl);
}

.experience-header {
    text-align: center;
    margin-bottom: 4rem;
}

.experience-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: var(--font-weight-bold);
    margin-bottom: 1.5rem;
}

.experience-description {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 700px;
    margin: 0 auto 2rem;
    line-height: 1.8;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background-color: var(--color-text);
    color: var(--color-bg);
    font-weight: var(--font-weight-semibold);
    border-radius: 50px;
    transition: all var(--transition-medium);
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 255, 255, 0.2);
}

.experience-table {
    max-width: 1000px;
    margin: 0 auto;
}

.experience-table-header {
    display: grid;
    grid-template-columns: 2fr 2fr 1fr;
    gap: 2rem;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.experience-row {
    display: grid;
    grid-template-columns: 2fr 2fr 1fr;
    gap: 2rem;
    padding: 2rem;
    border-bottom: 1px solid var(--color-border);
    transition: background-color var(--transition-fast);
}

.experience-row:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.experience-row .role {
    font-weight: var(--font-weight-semibold);
    font-size: 1.125rem;
}

.experience-row .company {
    color: var(--color-text-muted);
}

.experience-row .year {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* ===================================
   Skills Section
   =================================== */
.skills {
    margin-bottom: var(--spacing-2xl);
}

.skills-header {
    text-align: center;
    margin-bottom: 4rem;
}

.skills-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: var(--font-weight-bold);
    margin-bottom: 1.5rem;
}

.skills-description {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.skill-item {
    padding: 3rem 2rem;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    text-align: center;
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.skill-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-green) 100%);
    opacity: 0;
    transition: opacity var(--transition-medium);
    z-index: 0;
}

.skill-item:hover::before {
    opacity: 0.05;
}

.skill-item:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.skill-number {
    display: block;
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-muted);
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.skill-name {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    position: relative;
    z-index: 1;
}

/* ===================================
   Contact Section
   =================================== */
.contact {
    padding: var(--spacing-2xl) 3rem;
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.contact-title {
    font-size: clamp(4rem, 10vw, 8rem);
    font-weight: var(--font-weight-black);
    margin-bottom: 4rem;
    letter-spacing: -0.02em;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 6rem;
    margin-bottom: 6rem;
    flex-wrap: wrap;
}

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

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

.contact-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    text-align: left;
}

.contact-link {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    text-align: left;
    transition: opacity var(--transition-fast);
}

.contact-link:hover {
    opacity: 0.7;
}

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

.contact-value {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    transition: color var(--transition-fast);
}

.contact-value:hover {
    color: var(--color-accent);
}

/* ===================================
   Footer
   =================================== */
.footer {
    padding-top: 4rem;
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.back-to-top {
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.2em;
    padding: 1rem 2rem;
    border: 1px solid var(--color-border);
    border-radius: 50px;
    display: inline-block;
    margin: 0 auto 2rem;
    transition: all var(--transition-medium);
}

.back-to-top:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.footer-credit {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.footer-year {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
}

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

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

@keyframes float {

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

    50% {
        transform: translate(-50%, -50%) translateY(-20px);
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

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

    .nav-social {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-main {
        padding: 1.5rem 2rem;
    }

    .nav-links {
        gap: 2rem;
    }

    .nav-label {
        display: none;
    }

    .hero {
        padding: 0 2rem;
    }

    .projects {
        padding: var(--spacing-xl) 2rem;
    }

    .projects-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about {
        padding: var(--spacing-xl) 2rem;
    }

    .experience-table-header,
    .experience-row {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        padding: 1.5rem 1rem;
    }

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

    .contact {
        padding: var(--spacing-xl) 2rem;
    }

    .contact-info {
        flex-direction: column;
        gap: 3rem;
    }

    .contact-item,
    .contact-link {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .nav-main {
        padding: 1rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .hero-title {
        font-size: 3rem;
    }

    .projects {
        padding: var(--spacing-lg) 1rem;
    }

    .about {
        padding: var(--spacing-lg) 1rem;
    }

    .contact {
        padding: var(--spacing-lg) 1rem;
    }
}

/* ===================================
   Light Rays Background
   =================================== */
.light-rays {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
}

.light-ray {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 2px;
    height: 50%;
    transform-origin: top center;
    opacity: 0;
    animation: rayFadeIn 1s ease forwards;
}

.light-ray::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        rgba(74, 158, 255, 0.3) 0%,
        rgba(74, 158, 255, 0.15) 30%,
        rgba(74, 158, 255, 0.05) 60%,
        transparent 100%
    );
    filter: blur(1px);
}

@keyframes rayFadeIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px) rotate(var(--ray-rotation));
    }
    to {
        opacity: var(--ray-opacity);
        transform: translateX(-50%) translateY(0) rotate(var(--ray-rotation));
    }
}