/* ========================================
   Design Studio - Global Styles
   Dark Theme Portfolio Website
   ======================================== */

/* ========================================
   CSS Custom Properties (Variables)
   ======================================== */
:root {
    /* Colors */
    --color-bg-primary: #0B0B0F;
    --color-bg-secondary: #121214;
    --color-bg-tertiary: #1A1A1D;
    --color-border: #27272A;
    --color-border-light: #2A2A2A;
    
    --color-text-primary: #EDEDED;
    --color-text-secondary: #9AA4B2;
    --color-text-tertiary: #6B7280;
    
    --color-accent-from: #6366F1;
    --color-accent-to: #22D3EE;
    --color-accent-hover: #818CF8;
    
    /* Gradients */
    --gradient-accent: linear-gradient(135deg, var(--color-accent-from), var(--color-accent-to));
    --gradient-overlay: linear-gradient(180deg, transparent 0%, rgba(11, 11, 15, 0.9) 100%);
    
    /* Border Radius */
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --radius-pill: 999px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-accent: 0 4px 20px rgba(99, 102, 241, 0.3);
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    
    /* Container */
    --container-max-width: 1280px;
    --container-padding: 1.5rem;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    
    /* Z-index layers */
    --z-header: 1000;
    --z-modal: 2000;
}

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

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

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    overflow-x: hidden;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 700;
    color: var(--color-text-primary);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
}

h4 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
    font-weight: 600;
}

p {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

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

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

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

/* ========================================
   Layout & Container
   ======================================== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

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

/* ========================================
   Header & Navigation
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-header);
    padding: var(--space-md) 0;
    transition: background-color var(--transition-base), backdrop-filter var(--transition-base);
}

.header.scrolled {
    background-color: rgba(11, 11, 15, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.navbar {
    position: relative;
}

.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: rgba(18, 18, 20, 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-pill);
    padding: 0.75rem 1.5rem;
    box-shadow: var(--shadow-md);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.125rem;
    transition: transform var(--transition-base);
}

.logo:hover {
    transform: scale(1.02);
}

.logo-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-primary);
    font-size: 1.25rem;
    font-weight: 700;
}

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

/* Navigation Menu */
.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 0.938rem;
    padding: 0.5rem 0;
    position: relative;
    transition: color var(--transition-base);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    transition: width var(--transition-base);
}

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

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

.nav-cta {
    margin-left: 1rem;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: rotate(45deg) translateY(7px);
}

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

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: rotate(-45deg) translateY(-7px);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.938rem;
    font-weight: 600;
    border-radius: var(--radius-pill);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
    white-space: nowrap;
}

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

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

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

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

.btn-secondary:hover {
    border-color: var(--color-accent-from);
    box-shadow: 0 0 0 1px var(--color-accent-from);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn svg {
    width: 20px;
    height: 20px;
}

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

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    margin-bottom: var(--space-lg);
}

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

.hero-title-gradient {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.95;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   Page Hero (Internal Pages)
   ======================================== */
.page-hero {
    padding-top: 140px;
    padding-bottom: var(--space-2xl);
    text-align: center;
}

.page-title {
    margin-bottom: var(--space-md);
}

.page-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

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

.section-title {
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

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

/* ========================================
   Service Cards (Home)
   ======================================== */
.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

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

.service-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-accent-from);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    color: var(--color-text-primary);
}

.service-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.service-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ========================================
   Project Cards
   ======================================== */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.project-card {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: transform var(--transition-base);
}

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

.project-image {
    position: relative;
    width: 100%;
    height: 400px;
    overflow: hidden;
    border-radius: var(--radius-xl);
}

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

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

.project-overlay {
    position: absolute;
    inset: 0;
    background: var(--gradient-overlay);
    display: flex;
    align-items: flex-end;
    padding: var(--space-xl);
    opacity: 1;
    transition: opacity var(--transition-base);
}

.project-content {
    width: 100%;
}

.project-tag {
    display: inline-block;
    font-size: 0.813rem;
    font-weight: 600;
    color: var(--color-accent-to);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-xs);
}

.project-title {
    font-size: 1.75rem;
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-primary);
    font-weight: 600;
    font-size: 0.938rem;
    transition: gap var(--transition-base);
}

.project-link:hover {
    gap: 0.75rem;
    color: var(--color-accent-to);
}

/* ========================================
   Contact Teaser Cards
   ======================================== */
.contact-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto var(--space-xl);
}

.contact-card {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    text-align: center;
    transition: all var(--transition-base);
}

.contact-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent-from);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--space-md);
    border-radius: var(--radius-md);
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-primary);
}

.contact-card-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.contact-card-text {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.contact-card-link {
    display: inline-flex;
    align-items: center;
    color: var(--color-accent-to);
    font-weight: 600;
    font-size: 0.938rem;
}

/* ========================================
   Service Detail Page
   ======================================== */
.service-detail {
    border-bottom: 1px solid var(--color-border);
}

.service-detail:last-of-type {
    border-bottom: none;
}

.service-detail-content {
    max-width: 900px;
    margin: 0 auto;
}

.service-detail-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.service-icon-large {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-lg);
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--color-text-primary);
}

.service-detail-title {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    margin-bottom: var(--space-xs);
}

.service-detail-subtitle {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
}

.service-detail-description {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: var(--space-xl);
}

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

.service-features-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
    color: var(--color-text-primary);
}

.service-features-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.service-features-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: var(--color-text-secondary);
}

.service-features-list svg {
    flex-shrink: 0;
    margin-top: 0.2rem;
    color: var(--color-accent-to);
}

.service-pricing {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.service-price-label {
    color: var(--color-text-secondary);
    font-size: 0.938rem;
}

.service-price {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   FAQ Section
   ======================================== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.faq-item {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.faq-question {
    font-size: 1.125rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.faq-answer {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ========================================
   Portfolio Page
   ======================================== */
.portfolio-filter {
    padding: 100px 0 var(--space-xl);
    position: sticky;
    top: 80px;
    z-index: 100;
    background-color: var(--color-bg-primary);
}

.filter-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.938rem;
    font-weight: 600;
    background-color: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: all var(--transition-base);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-accent);
    color: var(--color-text-primary);
    border-color: transparent;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.portfolio-item {
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.portfolio-item.hidden {
    display: none;
}

.portfolio-image {
    position: relative;
    width: 100%;
    height: 450px;
    border-radius: var(--radius-xl);
    overflow: hidden;
    cursor: pointer;
}

.portfolio-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    font-size: 0.938rem;
}

/* ========================================
   Modal (Portfolio Detail)
   ======================================== */
.modal {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(11, 11, 15, 0.95);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: var(--space-xl);
    z-index: 1;
    animation: modalFadeIn var(--transition-base);
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.modal-close:hover {
    background-color: var(--color-accent-from);
    border-color: var(--color-accent-from);
}

/* ========================================
   About Page
   ======================================== */
.manifesto-content {
    max-width: 800px;
    margin: 0 auto;
}

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

.manifesto-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
}

.values-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

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

.value-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent-from);
}

.value-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    color: var(--color-text-primary);
}

.value-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.value-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.process-timeline {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

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

.process-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.process-title {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.process-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

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

.tech-category-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-lg);
    color: var(--color-text-primary);
    text-align: center;
}

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

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.tech-logo {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-lg);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-primary);
    transition: all var(--transition-base);
}

.tech-logo:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent-from);
    box-shadow: var(--shadow-md);
}

.tech-name {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.timeline-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    position: relative;
}

.timeline-list::before {
    content: '';
    position: absolute;
    left: 70px;
    top: 30px;
    bottom: 30px;
    width: 2px;
    background: var(--gradient-accent);
}

.timeline-item {
    display: flex;
    gap: var(--space-xl);
}

.timeline-year {
    flex-shrink: 0;
    width: 80px;
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.timeline-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
    color: var(--color-text-primary);
}

.timeline-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ========================================
   Contact Page
   ======================================== */
.contact-info-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto;
}

.contact-info-card {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    text-align: center;
}

.contact-info-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--space-md);
    border-radius: var(--radius-lg);
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-primary);
}

.contact-info-title {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.contact-info-text {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.contact-info-link {
    display: inline-block;
    color: var(--color-accent-to);
    font-weight: 600;
    font-size: 1.125rem;
}

.contact-form-wrapper {
    max-width: 700px;
    margin: 0 auto;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.form-label {
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: 0.938rem;
}

.required {
    color: var(--color-accent-from);
}

.form-input,
.form-textarea {
    padding: 1rem;
    font-size: 1rem;
    font-family: var(--font-primary);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    transition: all var(--transition-base);
}

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

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-text-tertiary);
}

.form-textarea {
    resize: vertical;
    min-height: 150px;
}

.form-error {
    color: #EF4444;
    font-size: 0.875rem;
    display: none;
}

.form-error.visible {
    display: block;
}

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
    margin-top: 0.25rem;
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.checkbox-label {
    color: var(--color-text-secondary);
    font-size: 0.938rem;
    line-height: 1.6;
}

.checkbox-label .link {
    color: var(--color-accent-to);
    text-decoration: underline;
}

.form-actions {
    margin-top: var(--space-md);
}

.form-success {
    padding: var(--space-lg);
    background-color: rgba(34, 211, 238, 0.1);
    border: 1px solid var(--color-accent-to);
    border-radius: var(--radius-lg);
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.form-success svg {
    flex-shrink: 0;
    color: var(--color-accent-to);
}

.form-success h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-xs);
    color: var(--color-text-primary);
}

.form-success p {
    color: var(--color-text-secondary);
}

.contact-note {
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.contact-note p {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    color: var(--color-text-secondary);
    font-size: 0.938rem;
    margin-bottom: var(--space-sm);
}

.contact-note svg {
    flex-shrink: 0;
    margin-top: 0.25rem;
    color: var(--color-accent-to);
}

.contact-note .link {
    color: var(--color-accent-to);
    text-decoration: underline;
}

.faq-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.faq-card {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.faq-card-title {
    font-size: 1.125rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.faq-card-text {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
    padding: var(--space-2xl) 0;
}

.cta-card {
    background: var(--gradient-accent);
    border-radius: var(--radius-xl);
    padding: var(--space-3xl) var(--space-xl);
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
}

.cta-text {
    font-size: 1.125rem;
    color: rgba(237, 237, 237, 0.9);
    margin-bottom: var(--space-xl);
}

.cta-card .btn-primary {
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
}

.cta-card .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

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

.footer-text {
    color: var(--color-text-secondary);
    font-size: 0.938rem;
}

.footer-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-links a {
    color: var(--color-text-secondary);
    font-size: 0.938rem;
    transition: color var(--transition-base);
}

.footer-links a:hover {
    color: var(--color-accent-to);
}

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

.footer-bottom p {
    color: var(--color-text-tertiary);
    font-size: 0.875rem;
}

/* ========================================
   Animations
   ======================================== */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========================================
   Responsive Design
   ======================================== */

/* Tablet - 768px */
@media (min-width: 768px) {
    :root {
        --container-padding: 2rem;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .values-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-info-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .faq-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tech-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Desktop - 1024px */
@media (min-width: 1024px) {
    :root {
        --container-padding: 2.5rem;
    }
    
    .services-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Large Desktop - 1280px */
@media (min-width: 1280px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Mobile Menu - Max 768px */
@media (max-width: 767px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 90px;
        left: var(--container-padding);
        right: var(--container-padding);
        flex-direction: column;
        gap: 0;
        background-color: var(--color-bg-secondary);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-xl);
        padding: var(--space-md);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: all var(--transition-base);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .nav-menu li {
        width: 100%;
        border-bottom: 1px solid var(--color-border);
    }
    
    .nav-menu li:last-child {
        border-bottom: none;
    }
    
    .nav-link {
        display: block;
        padding: var(--space-md);
        width: 100%;
    }
    
    .nav-cta {
        display: none;
    }
    
    .hero {
        min-height: auto;
        padding-top: 120px;
        padding-bottom: var(--space-2xl);
    }
    
    .page-hero {
        padding-top: 120px;
    }
    
    .service-detail-header {
        flex-direction: column;
    }
    
    .timeline-list::before {
        left: 35px;
    }
    
    .timeline-year {
        width: 60px;
        font-size: 1.25rem;
    }
    
    .timeline-item {
        gap: var(--space-md);
    }
}

/* Print Styles */
@media print {
    .header,
    .menu-toggle,
    .footer,
    .cta-section {
        display: none;
    }
}