/* ============================================================
   Portfolio — Dharmit Lakhani
   Senior Frontend Engineer
   Clean, calm, production-grade aesthetic
   ============================================================ */

/* ---- CSS Custom Properties ---- */
:root {
    /* Colors - Light Theme */
    --color-bg: #fafafa;
    --color-bg-alt: #ffffff;
    --color-bg-elevated: #ffffff;
    --color-bg-code: #f4f4f5;
    --color-surface: #f4f4f5;
    --color-surface-hover: #e4e4e7;
    --color-border: #e4e4e7;
    --color-border-subtle: #f4f4f5;

    --color-text: #18181b;
    --color-text-secondary: #52525b;
    --color-text-tertiary: #71717a;
    --color-text-muted: #a1a1aa;

    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-accent-subtle: #eff6ff;
    --color-accent-text: #ffffff;

    --color-tag-bg: #f0f0f3;
    --color-tag-text: #52525b;

    --color-code-keyword: #7c3aed;
    --color-code-string: #059669;
    --color-code-variable: #2563eb;
    --color-code-property: #d97706;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.1);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;

    /* Typography */
    --font-sans:
        "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", monospace;

    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;

    --leading-tight: 1.2;
    --leading-normal: 1.6;
    --leading-relaxed: 1.75;

    --tracking-tight: -0.02em;
    --tracking-normal: 0;
    --tracking-wide: 0.05em;

    /* Borders & Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

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

    /* Layout */
    --container-max: 1120px;
    --nav-height: 64px;
}

/* ---- Dark Theme ---- */
[data-theme="dark"] {
    --color-bg: #0a0a0b;
    --color-bg-alt: #111113;
    --color-bg-elevated: #18181b;
    --color-bg-code: #1e1e22;
    --color-surface: #1e1e22;
    --color-surface-hover: #27272a;
    --color-border: #27272a;
    --color-border-subtle: #1e1e22;

    --color-text: #fafafa;
    --color-text-secondary: #a1a1aa;
    --color-text-tertiary: #71717a;
    --color-text-muted: #52525b;

    --color-accent: #3b82f6;
    --color-accent-hover: #60a5fa;
    --color-accent-subtle: #172554;
    --color-accent-text: #ffffff;

    --color-tag-bg: #27272a;
    --color-tag-text: #a1a1aa;

    --color-code-keyword: #a78bfa;
    --color-code-string: #34d399;
    --color-code-variable: #60a5fa;
    --color-code-property: #fbbf24;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.35);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.4);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-height) + 2rem);
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition:
        background-color var(--transition-slow),
        color var(--transition-slow);
}

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

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

ul,
ol {
    list-style: none;
}

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

/* ---- Skip Link ---- */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-accent);
    color: var(--color-accent-text);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-weight: 500;
    z-index: 10000;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--space-md);
}

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

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-lg);
    }
}

/* ---- Section ---- */
.section {
    padding: var(--space-5xl) 0;
}

.section__header {
    margin-bottom: var(--space-3xl);
    max-width: 640px;
}

.section__label {
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.section__title {
    font-size: var(--text-4xl);
    font-weight: 700;
    letter-spacing: var(--tracking-tight);
    line-height: var(--leading-tight);
    margin-bottom: var(--space-md);
}

.section__desc {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

@media (max-width: 768px) {
    .section {
        padding: var(--space-3xl) 0;
    }

    .section__title {
        font-size: var(--text-3xl);
    }
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(250, 250, 250, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition:
        background var(--transition-slow),
        border-color var(--transition-slow);
}

[data-theme="dark"] .nav {
    background: rgba(10, 10, 11, 0.8);
}

.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
    font-size: var(--text-lg);
}

.nav__logo-img {
    display: block;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
}

/* Show light logo by default, dark logo hidden */
.nav__logo-img--dark {
    display: none;
}

[data-theme="dark"] .nav__logo-img--light {
    display: none;
}

[data-theme="dark"] .nav__logo-img--dark {
    display: block;
}

.nav__links {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.nav__link {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    transition:
        color var(--transition-fast),
        background var(--transition-fast);
}

.nav__link:hover {
    color: var(--color-text);
    background: var(--color-surface);
}

.nav__resume-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-accent);
    background: var(--color-accent-subtle);
    border-radius: var(--radius-full);
    padding: 6px 14px;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.nav__resume-btn:hover {
    background: var(--color-accent);
    color: var(--color-accent-text);
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--color-surface);
    color: var(--color-text);
}

[data-theme="dark"] .theme-toggle__moon,
[data-theme="light"] .theme-toggle__sun {
    display: none;
}

[data-theme="dark"] .theme-toggle__sun,
[data-theme="light"] .theme-toggle__moon {
    display: block;
}

/* Hamburger */
.nav__hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 36px;
    height: 36px;
    gap: 5px;
    z-index: 1001;
}

.nav__hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.nav__hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav__hamburger.active span:nth-child(2) {
    opacity: 0;
}

.nav__hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Nav */
.mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition:
        opacity var(--transition-base),
        visibility var(--transition-base);
}

.mobile-nav.active {
    opacity: 1;
    visibility: visible;
}

.mobile-nav__links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}

.mobile-nav__link {
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--color-text);
    transition: color var(--transition-fast);
}

.mobile-nav__link:hover {
    color: var(--color-accent);
}

.mobile-nav__resume {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--text-xl);
    color: var(--color-accent);
}

.mobile-nav__theme {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    margin-top: var(--space-md);
}

@media (max-width: 768px) {
    .nav__links {
        display: none;
    }

    .nav__hamburger {
        display: flex;
    }
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
    padding-top: calc(var(--nav-height) + var(--space-5xl));
    padding-bottom: var(--space-5xl);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.hero__greeting {
    font-size: var(--text-lg);
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.hero__title {
    font-size: var(--text-6xl);
    font-weight: 700;
    letter-spacing: var(--tracking-tight);
    line-height: 1.1;
    margin-bottom: var(--space-md);
}

.hero__tagline {
    font-size: var(--text-base);
    color: var(--color-text-tertiary);
    font-weight: 400;
    letter-spacing: var(--tracking-wide);
    margin-bottom: var(--space-xl);
}

.hero__summary {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-2xl);
    max-width: 540px;
}

.hero__actions {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
    flex-wrap: wrap;
}

.hero__links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.hero__social {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    transition: color var(--transition-fast);
    width: fit-content;
}

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

.hero__social svg {
    flex-shrink: 0;
}

/* Code Block Visual */
.hero__visual {
    display: flex;
    justify-content: flex-end;
}

.hero__code-block {
    background: var(--color-bg-code);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
    transition:
        background var(--transition-slow),
        border-color var(--transition-slow);
}

.hero__code-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.hero__code-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-border);
}

.hero__code-dot:nth-child(1) {
    background: #ff5f57;
}
.hero__code-dot:nth-child(2) {
    background: #ffbd2e;
}
.hero__code-dot:nth-child(3) {
    background: #28ca41;
}

.hero__code-filename {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.hero__code-content {
    padding: var(--space-lg);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    line-height: 1.8;
    overflow-x: auto;
}

.hero__code-content code {
    font-family: inherit;
}

.code-keyword {
    color: var(--color-code-keyword);
}
.code-string {
    color: var(--color-code-string);
}
.code-variable {
    color: var(--color-code-variable);
}
.code-property {
    color: var(--color-code-property);
}

@media (max-width: 1024px) {
    .hero__inner {
        grid-template-columns: 1fr;
        gap: var(--space-3xl);
    }

    .hero__visual {
        justify-content: flex-start;
    }

    .hero__code-block {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .hero {
        padding-top: calc(var(--nav-height) + var(--space-3xl));
        padding-bottom: var(--space-3xl);
        min-height: auto;
    }

    .hero__title {
        font-size: var(--text-4xl);
    }

    .hero__summary {
        font-size: var(--text-base);
    }

    .hero__actions {
        flex-direction: column;
    }
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 600;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn--primary {
    background: var(--color-accent);
    color: var(--color-accent-text);
}

.btn--primary:hover {
    background: var(--color-accent-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(1px);
    box-shadow: none;
}

.btn--secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn--secondary:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-text-muted);
    transform: translateY(-1px);
}

.btn--lg {
    padding: 14px 28px;
    font-size: var(--text-base);
}

.btn--sm {
    padding: 8px 16px;
    font-size: var(--text-xs);
}

/* ============================================================
   PREVIEW CARDS (Homepage)
   ============================================================ */
.preview-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.preview-card {
    display: flex;
    flex-direction: column;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    text-decoration: none;
    color: inherit;
    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        transform var(--transition-fast);
}

.preview-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.preview-card__meta {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.preview-card__title {
    font-size: var(--text-2xl);
    font-weight: 700;
    letter-spacing: var(--tracking-tight);
    margin-bottom: var(--space-sm);
}

.preview-card__desc {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-lg);
}

.preview-card__impact {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: var(--space-lg);
    padding: 0;
}

.preview-card__impact li {
    position: relative;
    padding-left: var(--space-lg);
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    line-height: var(--leading-relaxed);
}

.preview-card__impact li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 7px;
    width: 5px;
    height: 5px;
    background: var(--color-accent);
    border-radius: 50%;
}

.preview-card__tech {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: var(--space-lg);
}

.preview-card__tech span {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    padding: 3px 8px;
    background: var(--color-surface);
    color: var(--color-text-tertiary);
    border-radius: var(--radius-sm);
}

.preview-card__cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-accent);
    margin-top: auto;
    transition: gap var(--transition-fast);
}

.preview-card:hover .preview-card__cta {
    gap: 10px;
}

.work__all-link {
    text-align: center;
}

/* Active nav link */
.nav__link--active {
    color: var(--color-accent);
}

/* Work page header */
.work-page-header {
    padding-top: calc(var(--nav-height) + var(--space-4xl));
    padding-bottom: 0;
}

@media (max-width: 768px) {
    .preview-grid {
        grid-template-columns: 1fr;
    }

    .work-page-header {
        padding-top: calc(var(--nav-height) + var(--space-2xl));
    }
}

/* ============================================================
   PROJECTS / SELECTED WORK
   ============================================================ */
.work {
    background: var(--color-bg-alt);
}

.project {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-3xl);
    margin-bottom: var(--space-2xl);
    transition:
        background var(--transition-slow),
        border-color var(--transition-slow);
}

.project:last-child {
    margin-bottom: 0;
}

.project__header {
    margin-bottom: var(--space-2xl);
}

.project__meta {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.project__tag {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    padding: 4px 10px;
    background: var(--color-tag-bg);
    color: var(--color-tag-text);
    border-radius: var(--radius-full);
}

.project__title {
    font-size: var(--text-3xl);
    font-weight: 700;
    letter-spacing: var(--tracking-tight);
    margin-bottom: var(--space-xs);
}

.project__subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.project__link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-accent);
    transition: opacity var(--transition-fast);
}

.project__link:hover {
    opacity: 0.8;
}

.project__link--private {
    color: var(--color-text-tertiary);
    cursor: default;
}

.project__body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
}

.project__overview h4 {
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-sm);
    margin-top: var(--space-xl);
}

.project__overview h4:first-child {
    margin-top: 0;
}

.project__overview p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

.project__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.project__list li {
    position: relative;
    padding-left: var(--space-lg);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

.project__list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
}

/* Impact at a glance */
.project__impact-glance {
    background: var(--color-surface);
    border-left: 3px solid var(--color-accent);
    border-radius: var(--radius-sm);
    padding: var(--space-md) var(--space-lg);
    margin-top: var(--space-md);
    margin-bottom: var(--space-sm);
}

.project__impact-glance h4 {
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.project__impact-glance ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.project__impact-glance li {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    padding-left: var(--space-lg);
    position: relative;
}

.project__impact-glance li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
}

/* Project Accordion (details/summary) */
.project__details {
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-md);
}

.project__details-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) 0;
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--color-text-tertiary);
    cursor: pointer;
    list-style: none;
    user-select: none;
    transition: color var(--transition-fast);
}

.project__details-toggle::-webkit-details-marker {
    display: none;
}

.project__details-toggle::after {
    content: "";
    width: 8px;
    height: 8px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(-45deg);
    transition: transform var(--transition-fast);
    flex-shrink: 0;
    margin-left: var(--space-md);
}

.project__details[open] > .project__details-toggle::after {
    transform: rotate(45deg);
}

.project__details-toggle:hover {
    color: var(--color-text);
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    padding-left: var(--space-sm);
    padding-right: var(--space-sm);
    margin-left: calc(-1 * var(--space-sm));
    margin-right: calc(-1 * var(--space-sm));
}

.project__details-toggle:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
    border-radius: 2px;
}

.project__details-content {
    padding-bottom: var(--space-lg);
    animation: accordion-open 0.25s ease;
}

@keyframes accordion-open {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    .project__details-content {
        animation: none;
    }
}

/* Project Gallery */
.project__gallery {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

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

.project__screenshot img {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    display: block;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: transform var(--transition-slow);
}

.project__screenshot:hover img {
    transform: scale(1.015);
}

.project__screenshot figcaption {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    margin-top: var(--space-sm);
    line-height: var(--leading-normal);
}

.project__tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.project__tech span {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-text-tertiary);
    padding: 4px 10px;
    background: var(--color-surface);
    border-radius: var(--radius-sm);
}

@media (max-width: 1024px) {
    .project__body {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .project {
        padding: var(--space-xl);
    }

    .project__title {
        font-size: var(--text-2xl);
    }
}

/* ============================================================
   SKILLS
   ============================================================ */
.skills__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.skill-card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    transition: all var(--transition-base);
}

.skill-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.skill-card__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--color-accent-subtle);
    border-radius: var(--radius-md);
    color: var(--color-accent);
    margin-bottom: var(--space-lg);
}

.skill-card__title {
    font-size: var(--text-lg);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    transition: color var(--transition-fast);
}

.skill-card:hover .skill-card__title {
    color: var(--color-accent);
}

.skill-card__desc {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-lg);
}

.skill-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.skill-card__tags span {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    padding: 3px 8px;
    background: var(--color-surface);
    color: var(--color-text-tertiary);
    border-radius: var(--radius-sm);
}

@media (max-width: 1024px) {
    .skills__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .skills__grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================================
   HOW I WORK
   ============================================================ */
.how-i-work {
    background: var(--color-bg-alt);
}

.principles {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    max-width: 720px;
}

.principles__item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast);
}

.principles__item:hover {
    border-color: var(--color-accent);
}

.principles__item svg {
    color: var(--color-accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.principles__item strong {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 2px;
}

.principles__item span {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

/* ============================================================
   FEATURED PROJECT
   ============================================================ */
.featured {
    background: var(--color-bg-alt);
}

.featured__content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
}

.featured__badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.featured__desc {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-lg);
    max-width: 720px;
}

.featured__link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: var(--space-2xl);
    transition: opacity var(--transition-fast);
}

.featured__link:hover {
    opacity: 0.8;
}

.featured__highlights {
    margin-bottom: var(--space-2xl);
}

.featured__highlights h4,
.featured__evidence h4 {
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-md);
}

.featured__highlights ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.featured__highlights li {
    position: relative;
    padding-left: var(--space-lg);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

.featured__highlights li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
}

.featured__evidence-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
}

.featured__evidence-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.featured__evidence-item svg {
    color: var(--color-accent);
    flex-shrink: 0;
}

.featured__evidence-item:hover {
    border-color: var(--color-accent);
    background: var(--color-accent-subtle);
}

.featured__tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

.featured__tech-stack span {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-text-tertiary);
    padding: 4px 10px;
    background: var(--color-surface);
    border-radius: var(--radius-sm);
}

@media (max-width: 768px) {
    .featured__evidence-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

/* ============================================================
   CONTACT
   ============================================================ */
.contact {
    text-align: center;
}

.contact__inner {
    max-width: 560px;
    margin: 0 auto;
}

.contact__title {
    font-size: var(--text-4xl);
    font-weight: 700;
    letter-spacing: var(--tracking-tight);
    margin-bottom: var(--space-md);
}

.contact__desc {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-2xl);
}

.contact__actions {
    margin-bottom: var(--space-xl);
}

.contact__links {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
}

.contact__social {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-tertiary);
    transition: color var(--transition-fast);
}

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

@media (max-width: 768px) {
    .contact__title {
        font-size: var(--text-3xl);
    }
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
    border-top: 1px solid var(--color-border);
    padding: var(--space-2xl) 0 var(--space-xl);
    transition: border-color var(--transition-slow);
}

.footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-xl);
}

.footer__name {
    font-weight: 700;
    font-size: var(--text-base);
}

.footer__role {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

.footer__center {
    display: flex;
    gap: var(--space-lg);
}

.footer__link {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    transition: color var(--transition-fast);
}

.footer__link:hover {
    color: var(--color-text);
}

.footer__bottom {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.footer__bottom p {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

@media (max-width: 768px) {
    .footer__inner {
        flex-direction: column;
        gap: var(--space-lg);
        text-align: center;
    }

    .footer__center {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition:
        opacity 0.45s ease,
        transform 0.45s ease;
}

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

.fade-in--delay-1 {
    transition-delay: 0.1s;
}

.fade-in--delay-2 {
    transition-delay: 0.2s;
}

.fade-in--delay-3 {
    transition-delay: 0.3s;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .fade-in {
        opacity: 1;
        transform: none;
        transition: none;
    }

    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }

    .skill-card:hover {
        transform: none;
    }

    .preview-card:hover {
        transform: none;
    }

    .btn--primary:hover,
    .btn--secondary:hover {
        transform: none;
    }
}

/* Focus-visible improvements */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
    border-radius: 2px;
}

.btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
    box-shadow: 0 0 0 4px var(--color-accent-subtle);
}

/* ============================================================
   SCROLLBAR (optional refinement)
   ============================================================ */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* ============================================================
   PRINT STYLES
   ============================================================ */
@media print {
    .nav,
    .mobile-nav,
    .theme-toggle,
    .hero__visual,
    .project__gallery,
    .btn {
        display: none !important;
    }

    body {
        color: #000;
        background: #fff;
    }

    .section {
        padding: 1rem 0;
        break-inside: avoid;
    }
}