/* ========================================
   Design System — maxtybar.dev
   ======================================== */

/* --- Custom Properties --- */
:root {
    --color-bg: #0a0a0f;
    --color-bg-light: #111118;
    --color-bg-card: rgba(17, 17, 24, 0.7);
    --color-text: #ccd6f6;
    --color-text-muted: #8892b0;
    --color-text-bright: #e6f1ff;
    --color-accent: #64ffda;
    --color-accent-secondary: #7b61ff;
    --color-gradient-1: #64ffda;
    --color-gradient-2: #7b61ff;
    --color-gradient-3: #00b4d8;
    --color-border: rgba(100, 255, 218, 0.1);
    --color-glass: rgba(17, 17, 24, 0.6);
    --color-glass-border: rgba(100, 255, 218, 0.08);

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --fs-xs: clamp(0.75rem, 1.5vw, 0.8125rem);
    --fs-sm: clamp(0.8125rem, 1.8vw, 0.875rem);
    --fs-base: clamp(0.9375rem, 2vw, 1rem);
    --fs-md: clamp(1rem, 2.2vw, 1.125rem);
    --fs-lg: clamp(1.125rem, 2.5vw, 1.25rem);
    --fs-xl: clamp(1.25rem, 3vw, 1.5rem);
    --fs-2xl: clamp(1.5rem, 4vw, 2rem);
    --fs-3xl: clamp(2rem, 5vw, 3rem);
    --fs-hero: clamp(2.5rem, 7vw, 5rem);

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 5rem;
    --space-3xl: 8rem;

    --nav-height: 70px;
    --transition: 0.3s ease;
    --transition-slow: 0.6s ease;
    --border-radius: 8px;
    --border-radius-lg: 16px;
}

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

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

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

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

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

ul {
    list-style: none;
}

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

/* --- Noise Overlay --- */
.noise-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    pointer-events: none;
    opacity: 0.03;
    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");
    background-repeat: repeat;
    background-size: 256px 256px;
}

/* --- Gradient Mesh Background --- */
.gradient-mesh {
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(ellipse 80% 50% at 20% 20%, rgba(100, 255, 218, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse 60% 40% at 80% 80%, rgba(123, 97, 255, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse 50% 60% at 50% 50%, rgba(0, 180, 216, 0.04) 0%, transparent 50%),
        var(--color-bg);
}

/* --- Navigation --- */
.nav-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    background: var(--color-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-glass-border);
    transition: transform var(--transition), box-shadow var(--transition);
}

.nav-header--hidden {
    transform: translateY(-100%);
}

.nav-header--scrolled {
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: var(--fs-xl);
    font-weight: 700;
    color: var(--color-text-bright);
    letter-spacing: -0.02em;
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-link {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--color-text-muted);
    position: relative;
    padding: 0.25rem 0;
    transition: color var(--transition);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width var(--transition);
}

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

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

.nav-link--resume {
    border: 1px solid var(--color-accent);
    border-radius: var(--border-radius);
    padding: 0.5rem 1rem;
    color: var(--color-accent);
}

.nav-link--resume::after {
    display: none;
}

.nav-link--resume:hover {
    background: rgba(100, 255, 218, 0.08);
}

/* Mobile Nav Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.nav-toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle--active .nav-toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle--active .nav-toggle-bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle--active .nav-toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* --- Hero --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--nav-height) var(--space-lg) 0;
}

.hero-content {
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
}

.hero-greeting {
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.hero-name {
    font-size: var(--fs-hero);
    font-weight: 700;
    line-height: 1.05;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.03em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-gradient-1), var(--color-gradient-2), var(--color-gradient-3));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradient-shift 6s ease infinite;
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-tagline {
    font-size: var(--fs-3xl);
    font-weight: 600;
    color: var(--color-text-muted);
    line-height: 1.15;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
    min-height: 1.2em;
}

.typewriter-cursor {
    color: var(--color-accent);
    font-weight: 300;
    animation: blink 1s step-end infinite;
}

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

.hero-description {
    max-width: 540px;
    font-size: var(--fs-md);
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    font-weight: 500;
    padding: 0.875rem 1.75rem;
    border-radius: var(--border-radius);
    transition: all var(--transition);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn--primary {
    background: transparent;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
}

.btn--primary:hover {
    background: rgba(100, 255, 218, 0.08);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(100, 255, 218, 0.15);
}

.btn--outline {
    background: transparent;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
}

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

.btn--lg {
    padding: 1.125rem 2.25rem;
    font-size: var(--fs-base);
}

/* --- Sections --- */
.section {
    padding: var(--space-3xl) var(--space-lg);
}

.section-container {
    max-width: 1000px;
    margin: 0 auto;
}

.section-container--narrow {
    max-width: 600px;
    text-align: center;
}

.section-heading {
    font-size: var(--fs-2xl);
    font-weight: 700;
    color: var(--color-text-bright);
    margin-bottom: var(--space-xl);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    white-space: nowrap;
    letter-spacing: -0.02em;
}

.section-heading::after {
    content: '';
    display: block;
    width: 100%;
    max-width: 300px;
    height: 1px;
    background: linear-gradient(90deg, var(--color-border), transparent);
}

.section-heading--center {
    justify-content: center;
    flex-direction: column;
    gap: var(--space-xs);
}

.section-heading--center::after {
    display: none;
}

.section-number {
    font-family: var(--font-mono);
    font-size: var(--fs-lg);
    font-weight: 400;
    color: var(--color-accent);
}

/* --- About --- */
.about-grid {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: var(--space-xl);
    align-items: start;
}

.about-text p {
    color: var(--color-text-muted);
    font-size: var(--fs-md);
    margin-bottom: var(--space-md);
    line-height: 1.7;
}

.about-photo-wrapper {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 2px solid var(--color-glass-border);
    transition: border-color var(--transition);
}

.about-photo-wrapper:hover {
    border-color: var(--color-accent);
}

.about-photo-wrapper img {
    width: 100%;
    display: block;
    filter: grayscale(20%) contrast(1.05);
    transition: filter var(--transition);
}

.about-photo-wrapper:hover img {
    filter: none;
}

/* --- Skills --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
}

.skill-category {
    background: var(--color-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-lg);
    transition: border-color var(--transition), transform var(--transition);
}

.skill-category:hover {
    border-color: rgba(100, 255, 218, 0.2);
    transform: translateY(-4px);
}

.skill-category-title {
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--color-accent);
    margin-bottom: var(--space-md);
    font-weight: 500;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.skill-tag {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--color-text-muted);
    background: rgba(100, 255, 218, 0.05);
    border: 1px solid rgba(100, 255, 218, 0.08);
    border-radius: 20px;
    padding: 0.3rem 0.75rem;
    transition: all var(--transition);
}

.skill-tag:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: rgba(100, 255, 218, 0.1);
}

/* --- Projects Bento Grid --- */
.projects-bento {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-md);
}

.project-card {
    background: var(--color-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--border-radius-lg);
    padding: 1px;
    background: linear-gradient(135deg, transparent 40%, rgba(100, 255, 218, 0.15), transparent 60%);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition);
    pointer-events: none;
}

.project-card:hover {
    transform: translateY(-6px);
    border-color: rgba(100, 255, 218, 0.15);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
}

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

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

.project-card-inner {
    padding: var(--space-lg);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.project-card--featured .project-card-inner {
    flex-direction: row;
    gap: var(--space-lg);
    align-items: center;
}

.project-card--featured .project-card-content {
    flex: 1;
}

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

.project-card--featured .project-image {
    flex: 0 0 45%;
    max-width: 45%;
    margin-bottom: 0;
}

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

.project-card:hover .project-image img {
    transform: scale(1.03);
}

.project-image--sm {
    max-height: 160px;
}

.project-image--sm img {
    height: 160px;
}

.project-overline {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
}

.project-icon {
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.project-title {
    font-size: var(--fs-xl);
    font-weight: 600;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.01em;
}

.project-title a {
    color: var(--color-text-bright);
    transition: color var(--transition);
    text-decoration: none;
    position: relative;
}

.project-title a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width var(--transition);
}

.project-title a:hover,
.project-card:hover .project-title a {
    color: var(--color-accent);
}

.project-title a:hover::after,
.project-card:hover .project-title a::after {
    width: 100%;
}

.project-description {
    flex-grow: 1;
}

.project-description p {
    font-size: var(--fs-sm);
    color: var(--color-text-muted);
    line-height: 1.7;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-top: var(--space-md);
    margin-bottom: var(--space-md);
}

.project-tech li {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--color-text-muted);
}

.project-tech li::after {
    content: '\00b7';
    margin-left: var(--space-xs);
    color: var(--color-accent);
}

.project-tech li:last-child::after {
    display: none;
}

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

.project-link {
    color: var(--color-text-muted);
    transition: color var(--transition), transform var(--transition);
}

.project-link:hover {
    color: var(--color-accent);
    transform: translateY(-2px);
}

/* --- Contact --- */
.contact-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}

.contact-text {
    font-size: var(--fs-md);
    color: var(--color-text-muted);
    line-height: 1.7;
    max-width: 500px;
}

/* --- Footer --- */
.footer {
    padding: var(--space-xl) var(--space-lg);
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-md);
}

.footer-link {
    color: var(--color-text-muted);
    transition: color var(--transition), transform var(--transition);
    display: flex;
}

.footer-link:hover {
    color: var(--color-accent);
    transform: translateY(-3px);
}

.footer-credit {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--color-text-muted);
}

/* --- Side Elements --- */
.side-element {
    position: fixed;
    bottom: 0;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
}

.side-element::after {
    content: '';
    display: block;
    width: 1px;
    height: 90px;
    background: var(--color-text-muted);
}

.side-element--left {
    left: 40px;
}

.side-element--right {
    right: 40px;
}

.side-email {
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
    transition: color var(--transition), transform var(--transition);
}

.side-email:hover {
    color: var(--color-accent);
    transform: translateY(-4px);
}

.side-socials {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.side-socials a {
    color: var(--color-text-muted);
    transition: color var(--transition), transform var(--transition);
    display: flex;
}

.side-socials a:hover {
    color: var(--color-accent);
    transform: translateY(-3px);
}

/* --- Scroll Animations --- */
[data-animate] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

[data-animate].is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger delays */
[data-delay="1"] { transition-delay: 0.1s; }
[data-delay="2"] { transition-delay: 0.2s; }
[data-delay="3"] { transition-delay: 0.3s; }
[data-delay="4"] { transition-delay: 0.4s; }
[data-delay="5"] { transition-delay: 0.15s; }
[data-delay="6"] { transition-delay: 0.2s; }
[data-delay="7"] { transition-delay: 0.25s; }
[data-delay="8"] { transition-delay: 0.3s; }
[data-delay="9"] { transition-delay: 0.35s; }

/* --- Responsive --- */
@media (max-width: 1080px) {
    .side-element {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        width: min(75vw, 400px);
        height: 100vh;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--space-lg);
        background: var(--color-bg-light);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        transform: translateX(100%);
        transition: transform var(--transition);
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
    }

    .nav-links--open {
        transform: translateX(0);
    }

    .nav-link {
        font-size: var(--fs-lg);
    }

    .hero {
        padding-top: calc(var(--nav-height) + var(--space-xl));
    }

    .section {
        padding: var(--space-2xl) var(--space-md);
    }

    .section-heading::after {
        max-width: 100px;
    }

    .project-card--featured {
        grid-column: auto;
    }

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

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

    .about-photo-wrapper {
        max-width: 300px;
    }

    .project-card--featured .project-card-inner {
        flex-direction: column;
    }

    .project-card--featured .project-image {
        flex: none;
        max-width: 100%;
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .skills-grid {
        grid-template-columns: 1fr;
    }
}

/* --- 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-behavior: auto !important;
    }

    [data-animate] {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .gradient-text {
        animation: none;
        background-position: 0% 50%;
    }
}

/* --- Color Scheme: Light (if user prefers) --- */
@media (prefers-color-scheme: light) {
    :root {
        --color-bg: #f8f9fa;
        --color-bg-light: #ffffff;
        --color-bg-card: rgba(255, 255, 255, 0.7);
        --color-text: #334155;
        --color-text-muted: #64748b;
        --color-text-bright: #0f172a;
        --color-accent: #0d9488;
        --color-accent-secondary: #6d28d9;
        --color-gradient-1: #0d9488;
        --color-gradient-2: #6d28d9;
        --color-gradient-3: #0284c7;
        --color-border: rgba(13, 148, 136, 0.15);
        --color-glass: rgba(255, 255, 255, 0.6);
        --color-glass-border: rgba(13, 148, 136, 0.1);
    }

    .gradient-mesh {
        background:
            radial-gradient(ellipse 80% 50% at 20% 20%, rgba(13, 148, 136, 0.06) 0%, transparent 50%),
            radial-gradient(ellipse 60% 40% at 80% 80%, rgba(109, 40, 217, 0.06) 0%, transparent 50%),
            radial-gradient(ellipse 50% 60% at 50% 50%, rgba(2, 132, 199, 0.04) 0%, transparent 50%),
            var(--color-bg);
    }

    .noise-overlay {
        opacity: 0.015;
    }
}

/* --- Selection --- */
::selection {
    background: rgba(100, 255, 218, 0.2);
    color: var(--color-text-bright);
}