/* ================================
   CSS Custom Properties
   ================================ */
:root {
    /* Colors */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-secondary: #ec4899;
    --color-accent: #f59e0b;

    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f9fafb;
    --color-bg-tertiary: #f3f4f6;
    --color-bg-dark: #111827;

    --color-text-primary: #111827;
    --color-text-secondary: #6b7280;
    --color-text-tertiary: #9ca3af;
    --color-text-inverse: #ffffff;

    --color-border: #e5e7eb;
    --color-border-light: #f3f4f6;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-warm: linear-gradient(135deg, #fa709a 0%, #fee140 100%);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Playfair Display', Georgia, 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: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;

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

    /* Layout */
    --container-max-width: 1280px;
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    --border-radius-full: 9999px;

    /* 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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ================================
   Reset & Base Styles
   ================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

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

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

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

/* ================================
   Accessibility
   ================================ */
.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    background: var(--color-primary);
    color: var(--color-text-inverse);
    padding: var(--space-sm) var(--space-md);
    text-decoration: none;
    z-index: 100;
    border-radius: 0 0 var(--border-radius-md) 0;
}

.skip-link:focus {
    top: 0;
}

/* ================================
   Layout
   ================================ */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding-left: var(--space-md);
    padding-right: var(--space-md);
}

@media (min-width: 768px) {
    .container {
        padding-left: var(--space-lg);
        padding-right: var(--space-lg);
    }
}

/* ================================
   Navigation
   ================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border-light);
    transition: transform var(--transition-base), background var(--transition-base);
}

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

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

.nav-logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    transition: color var(--transition-fast);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: var(--space-xs);
    z-index: 1001;
}

.hamburger {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle[aria-expanded="true"] .hamburger:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .hamburger:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] .hamburger:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    list-style: none;
}

.nav-link {
    position: relative;
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: var(--space-xs) 0;
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.nav-link:hover,
.nav-link:focus {
    color: var(--color-primary);
}

.nav-link.active {
    color: var(--color-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
}

/* Dropdown */
.nav-dropdown {
    position: relative;
}

.dropdown-trigger {
    background: none;
    border: none;
    cursor: pointer;
}

.dropdown-icon {
    transition: transform var(--transition-fast);
}

.dropdown-trigger[aria-expanded="true"] .dropdown-icon {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 1rem);
    left: 50%;
    transform: translateX(-50%);
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--space-sm);
    min-width: 200px;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

.nav-dropdown:hover .dropdown-menu,
.dropdown-trigger[aria-expanded="true"] + .dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.dropdown-item {
    display: block;
    padding: var(--space-sm);
    border-radius: var(--border-radius-md);
    color: var(--color-text-secondary);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.dropdown-item:hover,
.dropdown-item:focus {
    background: var(--color-bg-tertiary);
    color: var(--color-primary);
}

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

    .nav-menu {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: 280px;
        background: white;
        flex-direction: column;
        align-items: flex-start;
        padding: 5rem var(--space-lg) var(--space-lg);
        gap: var(--space-md);
        transform: translateX(100%);
        transition: transform var(--transition-base);
        box-shadow: var(--shadow-2xl);
    }

    .nav-toggle[aria-expanded="true"] ~ .nav-menu {
        transform: translateX(0);
    }

    .dropdown-menu {
        position: static;
        transform: none;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        background: var(--color-bg-secondary);
        margin-top: var(--space-xs);
        display: none;
    }

    .dropdown-trigger[aria-expanded="true"] + .dropdown-menu {
        display: block;
    }
}

/* ================================
   Hero Section
   ================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: var(--space-lg);
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

@media (min-width: 768px) {
    .hero-container {
        grid-template-columns: 1fr 1fr;
    }
}

.hero-title {
    font-family: var(--font-display);
    font-size: var(--font-size-4xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-md);
}

@media (min-width: 768px) {
    .hero-title {
        font-size: var(--font-size-6xl);
    }
}

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

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 500px;
}

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

/* Floating Cards */
.hero-visual {
    position: relative;
    height: 400px;
}

.floating-card {
    position: absolute;
    background: white;
    border-radius: var(--border-radius-xl);
    padding: var(--space-lg);
    box-shadow: var(--shadow-xl);
    animation: float 6s ease-in-out infinite;
}

.card-1 {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 40%;
    right: 20%;
    animation-delay: 2s;
}

.card-3 {
    bottom: 20%;
    left: 30%;
    animation-delay: 4s;
}

.card-label {
    font-weight: 600;
    color: var(--color-primary);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(-3deg);
    }
    50% {
        transform: translateY(-20px) rotate(3deg);
    }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-text-tertiary);
    font-size: var(--font-size-sm);
}

.scroll-line {
    width: 2px;
    height: 40px;
    background: var(--color-text-tertiary);
    animation: scroll 2s ease-in-out infinite;
}

@keyframes scroll {
    0%, 100% {
        transform: scaleY(0.5);
        opacity: 0.5;
    }
    50% {
        transform: scaleY(1);
        opacity: 1;
    }
}

/* ================================
   Buttons
   ================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--border-radius-full);
    transition: all var(--transition-base);
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

.btn-large {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-size-lg);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-icon {
    transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
    transform: translateX(4px);
}

/* ================================
   Sections
   ================================ */
.about-preview,
.projects,
.process,
.cta,
.about-content,
.contact-content,
.page-header {
    padding: var(--space-3xl) 0;
}

.section-title {
    font-family: var(--font-display);
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

@media (min-width: 768px) {
    .section-title {
        font-size: var(--font-size-4xl);
    }
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 700px;
}

.text-center {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}

/* ================================
   About Preview
   ================================ */
.about-preview {
    background: var(--color-bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

@media (min-width: 768px) {
    .about-grid {
        grid-template-columns: 1.5fr 1fr;
    }
}

.link-arrow {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-primary);
    font-weight: 600;
    margin-top: var(--space-lg);
    transition: gap var(--transition-fast);
}

.link-arrow:hover {
    gap: var(--space-sm);
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

.stat-card {
    background: white;
    border-radius: var(--border-radius-xl);
    padding: var(--space-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.stat-number {
    display: block;
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.stat-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ================================
   Projects
   ================================ */
.project-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    margin-top: var(--space-3xl);
}

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

.project-card {
    transition: transform var(--transition-base);
}

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

.project-link {
    display: block;
}

.project-image {
    position: relative;
    aspect-ratio: 16 / 10;
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    margin-bottom: var(--space-md);
}

.project-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-5xl);
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

.project-view {
    color: white;
    font-weight: 600;
    font-size: var(--font-size-lg);
}

.project-tags {
    display: flex;
    gap: var(--space-xs);
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
}

.tag {
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-bg-secondary);
    color: var(--color-primary);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.project-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.project-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ================================
   Process
   ================================ */
.process {
    background: var(--color-bg-secondary);
}

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

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

@media (min-width: 1024px) {
    .process-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.process-step {
    text-align: center;
}

.process-number {
    display: inline-block;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    font-size: var(--font-size-xl);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
}

.process-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.process-description {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* ================================
   CTA Section
   ================================ */
.cta {
    background: var(--gradient-primary);
    color: white;
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    color: white;
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-md);
}

.cta-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-xl);
    opacity: 0.9;
}

/* ================================
   Page Header
   ================================ */
.page-header {
    padding-top: calc(80px + var(--space-3xl));
    padding-bottom: var(--space-xl);
    text-align: center;
    background: var(--color-bg-secondary);
}

.page-title {
    font-family: var(--font-display);
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--space-sm);
}

@media (min-width: 768px) {
    .page-title {
        font-size: var(--font-size-5xl);
    }
}

.page-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

/* ================================
   About Page
   ================================ */
.about-story {
    margin-bottom: var(--space-3xl);
    display: flex;
    gap: var(--space-3xl);
    align-items: flex-start;
}

@media (max-width: 768px) {
    .about-story {
        flex-direction: column;
    }

    .about-story .story-image {
        margin-right: 0 !important;
        margin-bottom: var(--space-xl);
        max-width: 100% !important;
    }
}

.large-text {
    font-size: var(--font-size-xl);
    color: var(--color-text-primary);
    margin-bottom: var(--space-lg);
    line-height: 1.6;
}

.story-text p {
    margin-bottom: var(--space-md);
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.skills-section {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-secondary);
    margin: var(--space-3xl) calc(-1 * var(--space-md));
}

@media (min-width: 768px) {
    .skills-section {
        margin: var(--space-3xl) 0;
        border-radius: var(--border-radius-xl);
    }
}

.skills-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

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

@media (min-width: 1024px) {
    .skills-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.skill-card {
    background: white;
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.skill-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-md);
}

.skill-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.skill-list {
    list-style: none;
}

.skill-list li {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    padding: var(--space-xs) 0;
}

/* Timeline */
.timeline-section {
    margin: var(--space-3xl) 0;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: var(--space-xl) auto 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

@media (min-width: 768px) {
    .timeline::before {
        left: 50%;
        transform: translateX(-50%);
    }
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: var(--space-xl);
}

@media (min-width: 768px) {
    .timeline-item {
        width: 50%;
        padding-left: 0;
        padding-right: var(--space-xl);
    }

    .timeline-item:nth-child(even) {
        margin-left: 50%;
        padding-left: var(--space-xl);
        padding-right: 0;
    }
}

.timeline-dot {
    position: absolute;
    left: 11px;
    top: 0;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 4px solid white;
    box-shadow: 0 0 0 2px var(--color-primary);
}

@media (min-width: 768px) {
    .timeline-dot {
        left: auto;
        right: -10px;
    }

    .timeline-item:nth-child(even) .timeline-dot {
        right: auto;
        left: -10px;
    }
}

.timeline-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.timeline-location {
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.timeline-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Philosophy */
.philosophy-section {
    margin: var(--space-3xl) 0;
}

.philosophy-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

@media (min-width: 768px) {
    .philosophy-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.philosophy-card {
    background: var(--color-bg-secondary);
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.philosophy-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
}

.philosophy-text {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.about-cta {
    margin-top: var(--space-3xl);
    text-align: center;
}

.cta-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-top: var(--space-xl);
    flex-wrap: wrap;
}

/* ================================
   Contact Page
   ================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
}

@media (min-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr 1.5fr;
    }
}

.contact-methods {
    margin-top: var(--space-xl);
}

.contact-method {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.contact-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius-lg);
    background: var(--color-bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
}

.contact-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-xs);
}

.contact-value {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
}

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

/* Contact Form */
.contact-form {
    background: var(--color-bg-secondary);
    padding: var(--space-xl);
    border-radius: var(--border-radius-xl);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--color-text-primary);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-md);
    font-family: inherit;
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-note {
    margin-top: var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.form-message {
    margin-top: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-sm);
    display: none;
}

.form-message.success {
    display: block;
    background: #d1fae5;
    color: #065f46;
}

.form-message.error {
    display: block;
    background: #fee2e2;
    color: #991b1b;
}

/* ================================
   Footer
   ================================ */
.footer {
    background: var(--color-bg-dark);
    color: var(--color-text-inverse);
    padding: var(--space-xl) 0;
}

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

.footer-text {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
}

.footer-link {
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: white;
}

/* ================================
   Back to Top Button
   ================================ */
.back-to-top {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base);
    z-index: var(--z-sticky);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* ================================
   Animations
   ================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}