/* ================================
   RESUME WEBSITE STYLESHEET
   ================================
   TABLE OF CONTENTS
   ================================
   1. CSS Custom Properties
   2. CSS Reset / Base Styles
   3. Typography
   4. Layout & Containers
   5. Buttons
   6. Navigation
   7. Hero Section
   8. Sections (Placeholder)
   9. Utility Classes
   10. Media Queries
   ================================ */

/* ================================
   1. CSS CUSTOM PROPERTIES
   ================================ */

:root {
    /* Colors - Forest Green */
    --color-primary: #166534;
    --color-secondary: #15803d;
    --color-accent: #22c55e;
    --color-background: #ffffff;
    --color-surface: #f0fdf4;
    --color-border: #dcfce7;
    --color-text-primary: #1f2937;
    --color-text-secondary: #4b5563;
    --color-text-muted: #6b7280;
    --color-primary-rgb: 22, 101, 52;

    /* Typography */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 3rem;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --line-height-tight: 1.25;
    --line-height-normal: 1.6;

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

    /* Layout */
    --container-max-width: 1200px;
    --container-padding: 1rem;
    --nav-height: 64px;
    --nav-height-mobile: 56px;

    /* Borders */
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 1rem;
    --border-radius-full: 9999px;
    --border-width: 1px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;

    /* Z-index */
    --z-fixed: 300;
}

/* Dark Mode Color Overrides */
[data-theme="dark"] {
    /* Dark mode colors */
    --color-background: #0f172a;
    --color-surface: #1e293b;
    --color-border: #334155;
    --color-text-primary: #f1f5f9;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #94a3b8;

    /* Keep brand colors but adjust for dark bg */
    --color-accent: #4ade80;

    /* Adjusted shadows for dark mode */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
}

/* ================================
   2. CSS RESET / BASE STYLES
   ================================ */

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul,
ol {
    list-style: none;
}

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

input,
textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ================================
   3. TYPOGRAPHY
   ================================ */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-family-primary);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

h4 {
    font-size: var(--font-size-xl);
}

h5 {
    font-size: var(--font-size-lg);
}

h6 {
    font-size: var(--font-size-base);
}

p {
    margin-bottom: var(--spacing-md);
}

p:last-child {
    margin-bottom: 0;
}

/* ================================
   4. LAYOUT & CONTAINERS
   ================================ */

.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ================================
   5. BUTTONS
   ================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    border-radius: var(--border-radius-md);
    transition: background-color var(--transition-normal),
                border-color var(--transition-normal),
                color var(--transition-normal),
                transform var(--transition-fast);
    cursor: pointer;
    text-align: center;
    white-space: nowrap;
    text-decoration: none;
}

.btn:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.btn:active {
    transform: translateY(1px);
}

/* Primary Button */
.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-background);
    border: var(--border-width) solid var(--color-primary);
}

.btn-primary:hover {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
}

/* Secondary Button */
.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: var(--border-width) solid var(--color-primary);
}

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-background);
}

/* ================================
   6. NAVIGATION
   ================================ */

.nav-primary {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    height: var(--nav-height);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.95) 0%, rgba(240, 253, 244, 0.9) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: var(--border-width) solid var(--color-border);
    transition: box-shadow var(--transition-normal), background var(--transition-normal);
}

/* Scrolled state - keeps styled background with added shadow */
.nav-primary.nav-scrolled {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(240, 253, 244, 0.95) 100%);
    box-shadow: var(--shadow-md);
    border-bottom-color: var(--color-border);
}

/* Dark mode header */
[data-theme="dark"] .nav-primary {
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 41, 59, 0.9) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: var(--border-width) solid var(--color-border);
}

/* Dark mode scrolled state - keeps styled background with added shadow */
[data-theme="dark"] .nav-primary.nav-scrolled {
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.98) 0%, rgba(30, 41, 59, 0.95) 100%);
    box-shadow: var(--shadow-md);
    border-bottom-color: var(--color-border);
}

.nav-primary .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    position: relative;
}

/* Nav Logo */
.nav-logo {
    flex-shrink: 0;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast), transform var(--transition-fast);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    background: linear-gradient(135deg, var(--color-surface) 0%, transparent 100%);
    border: var(--border-width) solid var(--color-border);
}

.nav-logo:hover {
    color: var(--color-accent);
    transform: scale(1.05);
}

[data-theme="dark"] .nav-logo {
    background: linear-gradient(135deg, var(--color-surface) 0%, transparent 100%);
    border-color: var(--color-border);
    color: var(--color-text-primary);
}

[data-theme="dark"] .nav-logo:hover {
    color: var(--color-accent);
}

/* Nav Menu - Centered */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.nav-menu-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
    position: relative;
    padding: var(--spacing-xs) 0;
}

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

/* Underline effect on hover */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-normal);
}

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

/* Nav CTA Button */
.nav-cta {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    background-color: var(--color-primary);
    color: var(--color-background);
    border-radius: var(--border-radius-md);
    text-decoration: none;
    transition: background-color var(--transition-normal);
}

.nav-cta:hover {
    background-color: var(--color-secondary);
}

/* Nav Toggle (Mobile Menu Button) */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    padding: var(--spacing-xs);
    background: transparent;
    border: none;
    cursor: pointer;
}

.nav-toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
    margin: 3px 0;
    transition: transform var(--transition-fast),
                opacity var(--transition-fast);
}

/* Hamburger to X animation when active */
.nav-toggle.is-active .nav-toggle-bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.is-active .nav-toggle-bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Theme Toggle Button */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: var(--spacing-xs);
    background: transparent;
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast),
                background-color var(--transition-fast);
    flex-shrink: 0;
    margin-left: auto;
}

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

.theme-toggle:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Show/hide icons based on theme */
.theme-toggle .icon-moon {
    display: block;
}

.theme-toggle .icon-sun {
    display: none;
}

[data-theme="dark"] .theme-toggle .icon-moon {
    display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    display: block;
}


/* ================================
   7. HERO SECTION
   ================================ */

/* Animated gradient keyframes */
@keyframes gradient-shift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

#hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-3xl) var(--container-padding);
    padding-top: calc(var(--spacing-3xl) + var(--nav-height));

    /* Animated gradient background */
    background: linear-gradient(
        -45deg,
        #ffffff,
        #f0fdf4,
        #dcfce7,
        #bbf7d0,
        #f0fdf4,
        #ffffff
    );
    background-size: 400% 400%;
    animation: gradient-shift 20s ease infinite;
}

/* Dark mode hero gradient */
[data-theme="dark"] #hero {
    background: linear-gradient(
        -45deg,
        #0f172a,
        #1e293b,
        #0f172a,
        #1e3a2f,
        #1e293b,
        #0f172a
    );
    background-size: 400% 400%;
    animation: gradient-shift 20s ease infinite;
}

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

.hero-name {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-md);
}

.hero-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.hero-tagline {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-normal);
    color: var(--color-text-muted);
    line-height: var(--line-height-normal);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* ================================
   8. SECTIONS
   ================================ */

/* Base Section Styles */
.section {
    padding: var(--spacing-section) 0;
}

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

/* Section Title */
.section-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    position: relative;
    display: inline-block;
}

/* Accent underline for section titles */
.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--color-accent);
    margin: var(--spacing-sm) auto 0;
    border-radius: var(--border-radius-full);
}

/* Section Subtitle */
.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    margin-top: var(--spacing-sm);
}

/* ================================
   8.0.1 PAGE HERO (Secondary Pages)
   ================================ */

.nav-header {
    height: var(--nav-height);
}

.page-hero {
    padding: var(--spacing-3xl) 0;
    padding-top: calc(var(--spacing-3xl) + var(--nav-height));
    background-color: var(--color-surface);
    text-align: center;
}

.page-hero__title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.page-hero__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

.page-hero__back {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.page-hero__back svg {
    transition: transform var(--transition-fast);
}

.page-hero__back:hover svg {
    transform: translateX(-4px);
}

/* ================================
   8.0.2 FOOTER
   ================================ */

.footer {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-surface);
    border-top: var(--border-width) solid var(--color-border);
}

.footer__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer__back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer__copyright {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin: 0;
}

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

.about {
    background-color: var(--color-surface);
}

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

.about-content p {
    color: var(--color-text-secondary);
    line-height: var(--line-height-normal);
    margin-bottom: var(--spacing-lg);
}

.about-content p:last-child {
    margin-bottom: 0;
}

/* ================================
   8.2 PROJECTS SECTION
   ================================ */

/* Projects Section Base */
.projects-section {
    padding: var(--spacing-2xl) 0;
}

.projects-section .section-header {
    margin-bottom: var(--spacing-lg);
}

/* Projects section variants */
.projects-section--highlights {
    background-color: var(--color-surface);
}

/* Highlights grid - centered for 2 items */
.projects-section--highlights .projects-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 400px));
    justify-content: center;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.projects-section--ongoing {
    background-color: var(--color-surface);
}

.projects-section--completed {
    background-color: var(--color-background);
}

/* Homepage projects section */
.projects {
    background-color: var(--color-surface);
}

/* Projects CTA container */
.projects-cta {
    display: flex;
    justify-content: center;
    margin-top: var(--spacing-2xl);
}

/* Projects Page Hero */
.projects-page-hero {
    padding: var(--spacing-xl) 0;
    padding-top: calc(var(--spacing-xl) + var(--nav-height));
    background-color: var(--color-surface);
    text-align: center;
}

.projects-page-hero .section-header {
    margin-bottom: 0;
}

/* --------------------------------
   Projects Grid
   -------------------------------- */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

/* Featured variant - 2 columns, centered */
.projects-grid--featured {
    grid-template-columns: repeat(2, 1fr);
    max-width: 900px;
    margin: 0 auto;
}

/* --------------------------------
   Project Card
   -------------------------------- */

.project-card {
    position: relative;
    background-color: var(--color-background);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition-normal),
                box-shadow var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* Full-card link overlay for clickable cards - stops above the links section */
.project-card__link {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 80px;
    z-index: 1;
}

/* Card Image */
.project-card__image {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background-color: var(--color-surface);
}

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

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

/* Card Content */
.project-card__content {
    padding: var(--spacing-lg);
}

/* Card Header */
.project-card__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

/* Card Title */
.project-card__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    line-height: var(--line-height-tight);
    margin: 0;
}

/* Card Status Badge */
.project-card__status {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    border-radius: var(--border-radius-full);
    white-space: nowrap;
    flex-shrink: 0;
}

.project-card__status--ongoing {
    background-color: rgba(34, 197, 94, 0.15);
    color: var(--color-accent);
}

[data-theme="dark"] .project-card__status--ongoing {
    background-color: rgba(74, 222, 128, 0.15);
    color: var(--color-accent);
}

.project-card__status--development {
    background-color: rgba(59, 130, 246, 0.15);
    color: #3b82f6;
}

[data-theme="dark"] .project-card__status--development {
    background-color: rgba(96, 165, 250, 0.15);
    color: #60a5fa;
}

.project-card__status--completed {
    background-color: var(--color-surface);
    color: var(--color-text-muted);
}

.project-card__status--highlight {
    background-color: rgba(22, 101, 52, 0.1);
    color: var(--color-primary);
}

[data-theme="dark"] .project-card__status--highlight {
    background-color: rgba(74, 222, 128, 0.15);
    color: var(--color-accent);
}

/* Card Description */
.project-card__description {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: var(--line-height-normal);
    margin-bottom: var(--spacing-md);
}

/* Card Tags */
.project-card__tags {
    position: relative;
    z-index: 2;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.project-tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    background-color: var(--color-surface);
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition-fast),
                color var(--transition-fast);
}

.project-tag:hover {
    background-color: var(--color-border);
    color: var(--color-text-primary);
}

/* Card Links */
.project-card__links {
    position: relative;
    z-index: 2;
    display: flex;
    gap: var(--spacing-md);
    padding-top: var(--spacing-sm);
    border-top: var(--border-width) solid var(--color-border);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.project-link:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--border-radius-sm);
}

.project-link svg,
.project-link .icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* Project link icon */
.project-link__icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* GitLab button - GitLab orange brand color */
.project-link--gitlab {
    color: #fc6d26;
}

.project-link--gitlab:hover {
    color: #e24329;
}

/* Demo button - use accent color */
.project-link--demo {
    color: var(--color-accent);
}

.project-link--demo:hover {
    color: var(--color-primary);
}

/* Details/Learn More button */
.project-link--details {
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-medium);
}

.project-link--details:hover {
    color: var(--color-primary);
}

/* Dark mode adjustments for GitLab colors */
[data-theme="dark"] .project-link--gitlab {
    color: #fc6d26;
}

[data-theme="dark"] .project-link--gitlab:hover {
    color: #fca326;
}

[data-theme="dark"] .project-hero__btn--gitlab {
    border-color: #fc6d26;
    color: #fc6d26;
}

[data-theme="dark"] .project-hero__btn--gitlab:hover {
    background-color: #fc6d26;
    border-color: #fc6d26;
    color: white;
}

/* ================================
   9. UTILITY CLASSES
   ================================ */

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Text alignment */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

/* Visibility */
.hidden {
    display: none;
}

.visible {
    display: block;
}

/* ================================
   PROJECT DETAIL PAGE
   ================================ */

/* Project Detail Main Container */
.project-detail {
    min-height: 100vh;
}

/* --------------------------------
   Project Hero
   -------------------------------- */

.project-hero {
    padding: var(--spacing-3xl) 0;
    padding-top: calc(var(--spacing-3xl) + var(--nav-height));
    background-color: var(--color-surface);
}

.project-hero .container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.project-hero__back {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
    align-self: flex-start;
}

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

.project-hero__back svg {
    transition: transform var(--transition-fast);
}

.project-hero__back:hover svg {
    transform: translateX(-4px);
}

.project-hero__content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.project-hero__header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.project-hero__title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    line-height: var(--line-height-tight);
    margin: 0;
}

.project-hero__status {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    border-radius: var(--border-radius-full);
    white-space: nowrap;
}

.project-hero__status--ongoing {
    background-color: rgba(34, 197, 94, 0.15);
    color: var(--color-accent);
}

[data-theme="dark"] .project-hero__status--ongoing {
    background-color: rgba(74, 222, 128, 0.15);
}

.project-hero__status--development {
    background-color: rgba(59, 130, 246, 0.15);
    color: #3b82f6;
}

[data-theme="dark"] .project-hero__status--development {
    background-color: rgba(96, 165, 250, 0.15);
    color: #60a5fa;
}

.project-hero__status--completed {
    background-color: var(--color-surface);
    color: var(--color-text-muted);
    border: var(--border-width) solid var(--color-border);
}

.project-hero__tagline {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: var(--line-height-normal);
    margin-bottom: var(--spacing-lg);
}

.project-hero__tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xl);
}

.project-hero__tags .project-tag {
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
}

.project-hero__actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
}

.project-hero__actions .btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.project-hero__actions .btn svg {
    flex-shrink: 0;
}

/* Demo button in hero - uses primary button styles by default */
.project-hero__btn--demo {
    /* Inherits from .btn .btn-primary */
}

/* GitLab button - secondary style with GitLab orange */
.project-hero__btn--gitlab {
    border-color: #fc6d26;
    color: #fc6d26;
    background-color: transparent;
}

.project-hero__btn--gitlab:hover {
    background-color: #fc6d26;
    border-color: #fc6d26;
    color: white;
}

/* Project Actions Section (bottom of detail page) */
.project-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-2xl) 0;
    margin-top: var(--spacing-2xl);
    border-top: var(--border-width) solid var(--color-border);
}

.project-hero__image {
    max-width: 1000px;
    margin: 0 auto;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: var(--border-width) solid var(--color-border);
}

.project-hero__image img {
    width: 100%;
    height: auto;
    display: block;
}

/* --------------------------------
   Project Sections
   -------------------------------- */

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

.project-section:nth-child(even) {
    background-color: var(--color-surface);
}

.project-section:nth-child(odd) {
    background-color: var(--color-background);
}

.project-section__title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xl);
    position: relative;
    display: inline-block;
}

.project-section__title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--color-accent);
    margin-top: var(--spacing-sm);
    border-radius: var(--border-radius-full);
}

/* --------------------------------
   Overview Section
   -------------------------------- */

.project-overview__content {
    max-width: 800px;
}

.project-overview__content p {
    color: var(--color-text-secondary);
    line-height: var(--line-height-normal);
    margin-bottom: var(--spacing-lg);
}

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

/* --------------------------------
   Challenge Section
   -------------------------------- */

.challenge-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-2xl);
}

.challenge-item {
    padding: var(--spacing-xl);
    background-color: var(--color-background);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--border-radius-lg);
}

.project-section:nth-child(even) .challenge-item {
    background-color: var(--color-surface);
}

.challenge-item__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background-color: rgba(var(--color-primary-rgb), 0.1);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-lg);
    color: var(--color-primary);
}

[data-theme="dark"] .challenge-item__icon {
    background-color: rgba(74, 222, 128, 0.1);
    color: var(--color-accent);
}

.challenge-item__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.challenge-item__content p {
    color: var(--color-text-secondary);
    line-height: var(--line-height-normal);
    margin-bottom: var(--spacing-md);
}

.challenge-item__content p:last-child {
    margin-bottom: 0;
}

.challenge-item__content ul {
    list-style: disc;
    list-style-position: inside;
    color: var(--color-text-secondary);
}

.challenge-item__content li {
    margin-bottom: var(--spacing-xs);
}

/* --------------------------------
   Architecture Section
   -------------------------------- */

.project-architecture__content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

.architecture-diagram {
    max-width: 100%;
    overflow-x: auto;
}

.architecture-diagram img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-md);
    border: var(--border-width) solid var(--color-border);
}

.architecture-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.architecture-category {
    padding: var(--spacing-lg);
    background-color: var(--color-surface);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--border-radius-md);
}

.project-section:nth-child(even) .architecture-category {
    background-color: var(--color-background);
}

.architecture-category__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.architecture-category__list {
    list-style: none;
}

.architecture-category__item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
}

.architecture-category__item::before {
    content: '';
    width: 6px;
    height: 6px;
    background-color: var(--color-accent);
    border-radius: 50%;
    flex-shrink: 0;
}

/* --------------------------------
   Features Section
   -------------------------------- */

.project-features__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    padding: var(--spacing-lg);
    background-color: var(--color-surface);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--border-radius-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.project-section:nth-child(even) .feature-card {
    background-color: var(--color-background);
}

.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.feature-card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background-color: rgba(var(--color-primary-rgb), 0.1);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

[data-theme="dark"] .feature-card__icon {
    background-color: rgba(74, 222, 128, 0.1);
    color: var(--color-accent);
}

.feature-card__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.feature-card__description {
    color: var(--color-text-secondary);
    line-height: var(--line-height-normal);
    font-size: var(--font-size-base);
}

/* --------------------------------
   Highlights Section
   -------------------------------- */

.project-highlights__content {
    max-width: 900px;
}

.highlight-block {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: var(--border-width) solid var(--color-border);
}

.highlight-block:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.highlight-block__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.highlight-block__content p {
    color: var(--color-text-secondary);
    line-height: var(--line-height-normal);
    margin-bottom: var(--spacing-md);
}

.highlight-block__content p:last-child {
    margin-bottom: 0;
}

/* Code Block Styling */
.code-block {
    background-color: #1e293b;
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    overflow-x: auto;
    margin: var(--spacing-md) 0;
}

.code-block code {
    font-family: 'Fira Code', 'Consolas', 'Monaco', monospace;
    font-size: var(--font-size-sm);
    color: #e2e8f0;
    line-height: 1.6;
}

[data-theme="dark"] .code-block {
    background-color: #0f172a;
    border: var(--border-width) solid var(--color-border);
}

/* --------------------------------
   Results Section
   -------------------------------- */

.project-results__content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

.results-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.metric-card {
    padding: var(--spacing-xl);
    background-color: var(--color-surface);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--border-radius-md);
    text-align: center;
}

.project-section:nth-child(even) .metric-card {
    background-color: var(--color-background);
}

.metric-card__value {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

[data-theme="dark"] .metric-card__value {
    color: var(--color-accent);
}

.metric-card__label {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
}

.results-details {
    max-width: 800px;
}

.results-details h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.results-details h3:first-child {
    margin-top: 0;
}

.results-details p {
    color: var(--color-text-secondary);
    line-height: var(--line-height-normal);
    margin-bottom: var(--spacing-md);
}

.results-details ul {
    list-style: disc;
    list-style-position: inside;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.results-details li {
    margin-bottom: var(--spacing-xs);
}

/* --------------------------------
   Gallery Section
   -------------------------------- */

.project-gallery__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.gallery-item {
    position: relative;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: var(--border-width) solid var(--color-border);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.gallery-item:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.gallery-item img {
    width: 100%;
    height: auto;
    display: block;
}

.gallery-item__caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-md);
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
    font-size: var(--font-size-sm);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.gallery-item:hover .gallery-item__caption {
    opacity: 1;
}

/* Video Container */
.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
}

.video-container iframe,
.video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* --------------------------------
   Project Navigation
   -------------------------------- */

.project-nav {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-surface);
    border-top: var(--border-width) solid var(--color-border);
}

.project-nav__links {
    display: flex;
    justify-content: space-between;
    align-items: stretch;
    gap: var(--spacing-md);
}

.project-nav__link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-background);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--border-radius-md);
    text-decoration: none;
    color: var(--color-text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    flex: 1;
    max-width: 300px;
}

.project-nav__link:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.project-nav__link--prev {
    justify-content: flex-start;
}

.project-nav__link--next {
    justify-content: flex-end;
    text-align: right;
}

.project-nav__link--all {
    flex: 0;
    justify-content: center;
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
}

.project-nav__link--all:hover {
    background-color: var(--color-primary);
    color: var(--color-background);
}

.project-nav__text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

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

.project-nav__title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

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

.project-nav__link:hover svg {
    color: var(--color-primary);
}

.project-nav__link--prev:hover svg {
    transform: translateX(-4px);
}

.project-nav__link--next:hover svg {
    transform: translateX(4px);
}

/* ================================
   10. MEDIA QUERIES
   ================================ */

/* Tablet Landscape (max-width: 1024px) */
@media (max-width: 1024px) {
    /* Projects - Tablet Landscape */
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Tablet (max-width: 768px) */
@media (max-width: 768px) {
    :root {
        --font-size-4xl: 2.5rem;
        --font-size-3xl: 1.75rem;
        --font-size-2xl: 1.25rem;
    }

    /* Navigation - Mobile */
    .nav-primary {
        height: var(--nav-height-mobile);
    }

    /* Project Detail - Tablet */
    .project-hero {
        padding-top: calc(var(--spacing-2xl) + var(--nav-height-mobile));
    }

    .project-hero__title {
        font-size: var(--font-size-3xl);
    }

    .project-hero__actions {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }

    .project-hero__actions .btn {
        width: 100%;
    }

    .challenge-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .project-section {
        padding: var(--spacing-3xl) 0;
    }

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

    .project-nav__link {
        max-width: 100%;
    }

    .project-nav__link--prev {
        order: 1;
    }

    .project-nav__link--all {
        order: 2;
    }

    .project-nav__link--next {
        order: 3;
    }

    .nav-toggle {
        display: flex;
    }

    .theme-toggle {
        margin-left: auto;
        margin-right: var(--spacing-sm);
    }

    .nav-menu {
        position: fixed;
        top: var(--nav-height-mobile);
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
        padding: var(--spacing-xl) var(--container-padding);
        background-color: var(--color-background);
        transform: translateX(100%);
        opacity: 0;
        visibility: hidden;
        transition: transform var(--transition-normal),
                    opacity var(--transition-normal),
                    visibility var(--transition-normal);
        gap: var(--spacing-lg);
    }

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

    .nav-menu-list {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }

    .nav-link {
        display: block;
        padding: var(--spacing-md) 0;
        font-size: var(--font-size-lg);
        border-bottom: var(--border-width) solid var(--color-border);
    }

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

    .nav-cta {
        display: block;
        text-align: center;
        padding: var(--spacing-md);
        margin-top: var(--spacing-md);
    }

    /* Hero - Tablet */
    #hero {
        padding-top: calc(var(--spacing-2xl) + var(--nav-height-mobile));
        min-height: 100vh;
    }

    .hero-name {
        font-size: var(--font-size-4xl);
    }

    .hero-title {
        font-size: var(--font-size-2xl);
    }

    .hero-tagline {
        font-size: var(--font-size-base);
    }

    .hero-actions {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .hero-actions .btn {
        width: 100%;
        max-width: 280px;
    }

    /* Sections - Tablet */
    .section {
        padding: var(--spacing-3xl) 0;
    }

    .section-header {
        margin-bottom: var(--spacing-xl);
    }

    /* Projects - Tablet */
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }

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

    .projects-page-hero {
        padding-top: calc(var(--spacing-2xl) + var(--nav-height-mobile));
    }

    /* Page Hero - Tablet */
    .page-hero {
        padding-top: calc(var(--spacing-2xl) + var(--nav-height-mobile));
    }

    /* Footer - Tablet */
    .footer__content {
        flex-direction: column;
        text-align: center;
    }

    .project-card__content {
        padding: var(--spacing-md);
    }

    .project-card__title {
        font-size: var(--font-size-lg);
    }
}

/* Mobile (max-width: 480px) */
@media (max-width: 480px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
        --font-size-2xl: 1.125rem;
        --container-padding: 0.75rem;
    }

    .hero-content {
        padding: 0 var(--spacing-sm);
    }

    .hero-name {
        font-size: var(--font-size-4xl);
        margin-bottom: var(--spacing-sm);
    }

    .hero-title {
        font-size: var(--font-size-xl);
    }

    .hero-tagline {
        font-size: var(--font-size-sm);
    }

    .hero-actions .btn {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-sm);
    }

    /* Projects - Mobile */
    .projects-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .projects-grid--featured {
        grid-template-columns: 1fr;
        max-width: 100%;
    }

    .projects-section--highlights .projects-grid {
        grid-template-columns: 1fr;
        max-width: 100%;
    }

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

    .projects-cta {
        margin-top: var(--spacing-xl);
    }

    .project-card__header {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .project-card__status {
        align-self: flex-start;
    }

    .project-card__links {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }

    /* Project Hero Actions - Mobile */
    .project-hero__actions {
        flex-direction: column;
        align-items: stretch;
    }

    .project-hero__actions .btn {
        text-align: center;
    }

    /* Project Actions Section - Mobile */
    .project-actions {
        flex-direction: column;
        align-items: center;
    }

    /* Project Detail - Mobile */
    .project-hero__title {
        font-size: var(--font-size-2xl);
    }

    .project-hero__tagline {
        font-size: var(--font-size-base);
    }

    .project-hero__status {
        font-size: var(--font-size-xs);
    }

    .project-section__title {
        font-size: var(--font-size-2xl);
    }

    .project-features__grid {
        grid-template-columns: 1fr;
    }

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

    .metric-card__value {
        font-size: var(--font-size-3xl);
    }

    .project-gallery__grid {
        grid-template-columns: 1fr;
    }

    .architecture-details {
        grid-template-columns: 1fr;
    }
}

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

    html {
        scroll-behavior: auto;
    }
}