/* ==========================================
   CSS Custom Properties
   ========================================== */
:root {
    /* Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #121212;
    --bg-card: #1a1a1a;
    --accent: #eb7150;
    --accent-hover: #f58567;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --grid-line: rgba(255, 255, 255, 0.03);
    --border-subtle: rgba(255, 255, 255, 0.08);

    /* Typography */
    --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --section-padding: 120px;
    --container-max: 1200px;

    /* Animation */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-display);
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

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

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

/* ==========================================
   Background Effects
   ========================================== */
.bg-grid,
.bg-noise,
.bg-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.bg-grid {
    background-image:
        repeating-linear-gradient(
            0deg,
            var(--grid-line) 0px,
            var(--grid-line) 1px,
            transparent 1px,
            transparent 80px
        ),
        repeating-linear-gradient(
            90deg,
            var(--grid-line) 0px,
            var(--grid-line) 1px,
            transparent 1px,
            transparent 80px
        );
    opacity: 0.6;
}

.bg-noise {
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.03;
}

.bg-glow {
    background: radial-gradient(
        ellipse 80% 50% at 50% 20%,
        rgba(235, 113, 80, 0.08) 0%,
        transparent 60%
    );
}

/* ==========================================
   Typography Utilities
   ========================================== */
.mono {
    font-family: var(--font-mono);
    font-weight: 400;
    letter-spacing: 0.02em;
}

/* ==========================================
   Layout
   ========================================== */
main {
    position: relative;
    z-index: 1;
}

.section {
    position: relative;
    padding: var(--section-padding) 24px;
    max-width: var(--container-max);
    margin: 0 auto;
}

/* Section Markers (L-shaped brackets) */
.section-marker {
    position: absolute;
    width: 20px;
    height: 20px;
    border-color: var(--border-subtle);
    border-style: solid;
}

.section-marker.left {
    top: var(--section-padding);
    left: 24px;
    border-width: 1px 0 0 1px;
}

.section-marker.right {
    bottom: var(--section-padding);
    right: 24px;
    border-width: 0 1px 1px 0;
}

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

.section-label {
    display: block;
    font-size: 0.75rem;
    color: var(--accent);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 60px 24px;
    position: relative;
}

.hero-content {
    max-width: 700px;
}

.hero-photo-wrapper {
    margin-bottom: 32px;
}

.hero-photo {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--bg-card);
    box-shadow:
        0 0 0 1px var(--border-subtle),
        0 0 60px rgba(235, 113, 80, 0.15);
}

.hero-name {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 20px;
}

.hero-tagline {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.hero-tagline .separator {
    width: 4px;
    height: 4px;
    background-color: var(--accent);
    border-radius: 50%;
}

.hero-intro {
    font-size: 1.125rem;
    font-weight: 300;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 540px;
    margin: 0 auto;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.8); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* ==========================================
   Hero Animations
   ========================================== */
.animate-fade-up {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.6s ease forwards;
    animation-delay: calc(var(--delay, 0) * 100ms + 200ms);
}

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

/* ==========================================
   Projects Section
   ========================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 24px;
}

.project-card {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 24px;
    padding: 32px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    transition:
        transform var(--transition-base),
        border-color var(--transition-base),
        box-shadow var(--transition-base);
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 8px 40px rgba(235, 113, 80, 0.1);
}

.project-content {
    flex: 1;
}

.project-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.project-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.7;
}

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

.project-arrow {
    flex-shrink: 0;
    color: var(--text-muted);
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.project-card:hover .project-arrow {
    color: var(--accent);
    transform: translate(4px, -4px);
}

/* ==========================================
   Skills Section
   ========================================== */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

.skill-item {
    position: relative;
    padding-left: 20px;
}

.skill-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background-color: var(--accent);
    border-radius: 1px;
}

.skill-category {
    display: block;
    font-size: 0.8125rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
}

.skill-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================
   Contact Section
   ========================================== */
.contact {
    text-align: center;
    padding-bottom: 60px;
}

.contact-divider {
    width: 60px;
    height: 1px;
    background: linear-gradient(
        to right,
        transparent,
        var(--accent),
        transparent
    );
    margin: 0 auto 60px;
}

.contact .section-header {
    margin-bottom: 40px;
}

.contact-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    margin-bottom: 60px;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    color: var(--text-secondary);
    transition:
        color var(--transition-fast),
        border-color var(--transition-fast),
        background-color var(--transition-fast);
}

.contact-link:hover {
    color: var(--text-primary);
    border-color: var(--accent);
    background-color: rgba(235, 113, 80, 0.05);
}

.contact-link:hover svg {
    transform: translate(2px, -2px);
}

.contact-link svg {
    transition: transform var(--transition-fast);
}

.contact-link-label {
    font-size: 0.875rem;
    letter-spacing: 0.02em;
}

.copyright {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

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

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children */
.projects-grid .scroll-animate:nth-child(1) { transition-delay: 0ms; }
.projects-grid .scroll-animate:nth-child(2) { transition-delay: 100ms; }
.projects-grid .scroll-animate:nth-child(3) { transition-delay: 200ms; }

.skills-grid .scroll-animate:nth-child(1) { transition-delay: 0ms; }
.skills-grid .scroll-animate:nth-child(2) { transition-delay: 100ms; }
.skills-grid .scroll-animate:nth-child(3) { transition-delay: 200ms; }
.skills-grid .scroll-animate:nth-child(4) { transition-delay: 300ms; }

/* ==========================================
   Responsive - Tablet
   ========================================== */
@media (min-width: 768px) {
    .section {
        padding: var(--section-padding) 48px;
    }

    .section-marker.left {
        left: 48px;
    }

    .section-marker.right {
        right: 48px;
    }

    .hero-photo {
        width: 200px;
        height: 200px;
    }

    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 48px 60px;
    }

    .contact-links {
        flex-direction: row;
        justify-content: center;
    }
}

/* ==========================================
   Responsive - Desktop
   ========================================== */
@media (min-width: 1024px) {
    .section {
        padding: var(--section-padding) 80px;
    }

    .section-marker.left {
        left: 80px;
    }

    .section-marker.right {
        right: 80px;
    }

    .projects-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 32px;
    }

    .project-card {
        flex-direction: column;
        align-items: stretch;
    }

    .project-arrow {
        align-self: flex-end;
        margin-top: auto;
    }

    .project-content {
        display: flex;
        flex-direction: column;
    }

    .project-description {
        flex: 1;
    }
}

/* ==========================================
   Focus States (Accessibility)
   ========================================== */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

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

    .scroll-animate {
        opacity: 1;
        transform: none;
    }

    .animate-fade-up {
        opacity: 1;
        transform: none;
        animation: none;
    }
}