/**
 * SE3 Mühendislik - Kurumsal Stil Dosyası
 * Modern, Profesyonel ve Kurumsal Tasarım
 */

/* ==========================================
   CSS CUSTOM PROPERTIES (Variables)
   ========================================== */
:root {
    /* Renk Paleti - Koyu Lacivert Tema */
    --color-primary: #0a1628;
    --color-primary-light: #142444;
    --color-primary-dark: #050d17;
    
    --color-secondary: #1e40af;
    --color-secondary-light: #3b82f6;
    --color-secondary-dark: #1e3a8a;
    
    --color-accent: #f59e0b;
    --color-accent-light: #fbbf24;
    --color-accent-dark: #d97706;
    
    /* Nötr Renkler */
    --color-white: #ffffff;
    --color-black: #000000;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;
    
    /* Fonksiyonel Renkler */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;
    
    /* Tipografi */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Font Ağırlıkları */
    --fw-light: 300;
    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;
    --fw-extrabold: 800;
    
    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-slower: 500ms ease;
    
    /* Z-index Scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-tooltip: 600;
    
    /* Container */
    --container-max: 1280px;
    --container-padding: 1.5rem;
    
    /* Header Height */
    --header-height: 100px;
}

/* ==========================================
   RESET & BASE
   ========================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: var(--fw-regular);
    line-height: 1.7;
    color: var(--color-gray-700);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: var(--fw-bold);
    line-height: 1.2;
    color: var(--color-gray-900);
    margin-bottom: var(--space-md);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

/* Paragraphs & Text */
p {
    margin-bottom: var(--space-md);
}

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

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

a:hover {
    color: var(--color-secondary-light);
}

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

ul, ol {
    list-style: none;
}

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

/* Accessibility */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    z-index: var(--z-tooltip);
    transition: top var(--transition-fast);
}

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

/* Selection */
::selection {
    background: var(--color-secondary);
    color: var(--color-white);
}

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

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

.section--gray {
    background-color: var(--color-gray-50);
}

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

.section--dark h2,
.section--dark h3,
.section--dark h4 {
    color: var(--color-white);
}

/* Section Header */
.section__header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-3xl);
}

.section__label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: var(--fw-semibold);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.section__label::before,
.section__label::after {
    content: '';
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent));
}

.section__label::before {
    background: linear-gradient(90deg, var(--color-accent), transparent);
}

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

.section__desc {
    font-size: 1.125rem;
    color: var(--color-gray-600);
}

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: var(--fw-semibold);
    padding: 0.875rem 2rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    text-decoration: none;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: var(--color-white);
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
    color: var(--color-white);
}

.btn--secondary {
    background: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

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

.btn--outline {
    background: transparent;
    color: var(--color-secondary);
    border-color: var(--color-secondary);
}

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

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

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

.btn--lg {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

.btn--sm {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
}

/* ==========================================
   HEADER
   ========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-200);
    z-index: var(--z-fixed);
    transition: all var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-lg);
}

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

.header__logo {
    display: flex;
    align-items: center;
}

.header__logo img {
    height: 70px;
    width: auto;
}

/* Navigation */
.header__nav {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

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

.header__nav-link {
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: var(--fw-medium);
    color: var(--color-gray-700);
    padding: var(--space-sm) 0;
    position: relative;
    transition: color var(--transition-fast);
}

.header__nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-secondary));
    transition: width var(--transition-base);
}

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

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

.header__cta {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
}

/* Mobile Menu Button */
.header__menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    position: relative;
    z-index: calc(var(--z-fixed) + 1);
}

.header__menu-icon,
.header__menu-icon::before,
.header__menu-icon::after {
    width: 24px;
    height: 2px;
    background: var(--color-gray-800);
    border-radius: 2px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    transition: all var(--transition-base);
}

.header__menu-icon {
    top: 50%;
    transform: translate(-50%, -50%);
}

.header__menu-icon::before,
.header__menu-icon::after {
    content: '';
}

.header__menu-icon::before {
    top: -7px;
}

.header__menu-icon::after {
    top: 7px;
}

/* Mobile Menu Active State */
.header__menu-btn.active .header__menu-icon {
    background: transparent;
}

.header__menu-btn.active .header__menu-icon::before {
    top: 0;
    transform: translateX(-50%) rotate(45deg);
}

.header__menu-btn.active .header__menu-icon::after {
    top: 0;
    transform: translateX(-50%) rotate(-45deg);
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 50%, var(--color-secondary-dark) 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(245, 158, 11, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 40% 80%, rgba(59, 130, 246, 0.1) 0%, transparent 40%);
    pointer-events: none;
}

/* Grid Pattern */
.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
}

.hero__content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.hero__text {
    color: var(--color-white);
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: var(--fw-medium);
    margin-bottom: var(--space-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.hero__badge i {
    color: var(--color-accent);
}

.hero__title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: var(--fw-extrabold);
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    color: var(--color-white);
}

.hero__title span {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__desc {
    font-size: 1.25rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--space-xl);
    max-width: 540px;
}

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

/* Hero Visual */
.hero__visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero__image-wrapper {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.hero__image {
    position: relative;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-2xl);
}

.hero__image img {
    width: 100%;
    height: auto;
}

/* Floating Cards */
.hero__float-card {
    position: absolute;
    background: var(--color-white);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    animation: float 3s ease-in-out infinite;
}

.hero__float-card--top {
    top: 10%;
    right: -30px;
}

.hero__float-card--bottom {
    bottom: 15%;
    left: -40px;
    animation-delay: 1.5s;
}

.hero__float-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-light));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: 1.25rem;
}

.hero__float-text strong {
    display: block;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--color-gray-900);
}

.hero__float-text span {
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Hero Scroll Indicator */
.hero__scroll {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.hero__scroll-mouse {
    width: 24px;
    height: 36px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    position: relative;
}

.hero__scroll-mouse::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    width: 4px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 2px;
    transform: translateX(-50%);
    animation: scroll-anim 2s ease-in-out infinite;
}

@keyframes scroll-anim {
    0%, 100% { 
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    50% {
        opacity: 0.5;
        transform: translateX(-50%) translateY(10px);
    }
}

/* ==========================================
   ABOUT SECTION
   ========================================== */
.about__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.about__image-wrapper {
    position: relative;
}

.about__image {
    position: relative;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.about__image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 50%, rgba(10, 22, 40, 0.5));
    z-index: 1;
}

.about__image img {
    width: 100%;
    height: auto;
    transition: transform var(--transition-slower);
}

.about__image:hover img {
    transform: scale(1.05);
}

/* Experience Badge */
.about__experience {
    position: absolute;
    bottom: var(--space-xl);
    right: var(--space-xl);
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: var(--color-white);
    padding: var(--space-lg) var(--space-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    z-index: 2;
    box-shadow: var(--shadow-xl);
}

.about__experience-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: var(--fw-extrabold);
    line-height: 1;
}

.about__experience-text {
    font-size: 0.875rem;
    font-weight: var(--fw-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* About Text */
.about__text h2 {
    margin-bottom: var(--space-lg);
}

.about__text p {
    color: var(--color-gray-600);
    margin-bottom: var(--space-lg);
}

/* About Features */
.about__features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.about__feature {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
}

.about__feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-light));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.about__feature-title {
    font-family: var(--font-heading);
    font-weight: var(--fw-semibold);
    color: var(--color-gray-900);
    margin-bottom: var(--space-xs);
}

.about__feature-desc {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin-bottom: 0;
}

/* ==========================================
   SERVICES SECTION
   ========================================== */
.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--space-xl);
}

.service-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-gray-100);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card__icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--color-white);
    margin-bottom: var(--space-lg);
    transition: transform var(--transition-base);
}

.service-card:hover .service-card__icon {
    transform: scale(1.1) rotate(-5deg);
}

.service-card__title {
    font-family: var(--font-heading);
    font-size: 1.375rem;
    font-weight: var(--fw-semibold);
    margin-bottom: var(--space-md);
}

.service-card__desc {
    color: var(--color-gray-600);
    margin-bottom: var(--space-lg);
}

.service-card__link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-heading);
    font-weight: var(--fw-semibold);
    color: var(--color-secondary);
    transition: gap var(--transition-base);
}

.service-card__link:hover {
    gap: var(--space-md);
}

/* ==========================================
   REFERENCES SECTION
   ========================================== */
.references__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.reference-card {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    aspect-ratio: 4/3;
    cursor: pointer;
}

.reference-card__image {
    position: absolute;
    inset: 0;
}

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

.reference-card:hover .reference-card__image img {
    transform: scale(1.1);
}

.reference-card__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(10, 22, 40, 0.9) 0%, transparent 60%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.reference-card:hover .reference-card__overlay {
    background: linear-gradient(to top, rgba(10, 22, 40, 0.95) 0%, rgba(10, 22, 40, 0.4) 100%);
}

.reference-card__category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: var(--fw-semibold);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.reference-card__title {
    font-family: var(--font-heading);
    font-size: 1.375rem;
    font-weight: var(--fw-semibold);
    color: var(--color-white);
    margin-bottom: 0;
}

.reference-card__year {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: var(--space-sm);
}

/* ==========================================
   STATS SECTION
   ========================================== */
.stats {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.15), transparent 70%);
    pointer-events: none;
}

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

.stat-item {
    text-align: center;
    padding: var(--space-xl);
    position: relative;
}

.stat-item::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 60%;
    background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.2), transparent);
}

.stat-item:last-child::after {
    display: none;
}

.stat-item__number {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: var(--fw-extrabold);
    color: var(--color-white);
    line-height: 1;
    margin-bottom: var(--space-sm);
}

.stat-item__number span {
    color: var(--color-accent);
}

.stat-item__label {
    font-size: 1rem;
    font-weight: var(--fw-medium);
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ==========================================
   CONTACT SECTION
   ========================================== */
.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-3xl);
}

.contact__info {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-2xl);
    padding: var(--space-3xl);
    color: var(--color-white);
}

.contact__info-title {
    font-size: 1.75rem;
    color: var(--color-white);
    margin-bottom: var(--space-lg);
}

.contact__info-desc {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-2xl);
}

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

.contact__info-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
}

.contact__info-icon {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--color-accent);
    flex-shrink: 0;
}

.contact__info-text h4 {
    color: var(--color-white);
    font-size: 1rem;
    margin-bottom: var(--space-xs);
}

.contact__info-text p,
.contact__info-text a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
    margin: 0;
}

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

/* Contact Form */
.contact__form-wrapper {
    background: var(--color-white);
    border-radius: var(--radius-2xl);
    padding: var(--space-3xl);
    box-shadow: var(--shadow-xl);
}

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

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

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

.form-group label {
    display: block;
    font-family: var(--font-heading);
    font-weight: var(--fw-medium);
    color: var(--color-gray-700);
    margin-bottom: var(--space-sm);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.875rem 1rem;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-gray-800);
    background: var(--color-gray-50);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-secondary);
    background: var(--color-white);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-gray-400);
}

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

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    background: var(--color-primary);
    color: var(--color-white);
    position: relative;
}

.footer__wave {
    position: absolute;
    top: -1px;
    left: 0;
    right: 0;
    color: var(--color-white);
    line-height: 0;
}

.footer__wave svg {
    width: 100%;
    height: 80px;
}

.footer__main {
    padding: var(--space-5xl) 0 var(--space-3xl);
}

.footer__grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: var(--space-3xl);
}

.footer__col--brand {
    padding-right: var(--space-2xl);
}

.footer__logo {
    display: inline-block;
    margin-bottom: var(--space-lg);
}

.footer__logo img {
    height: 65px;
    filter: brightness(0) invert(1);
}

.footer__desc {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-lg);
    line-height: 1.8;
}

.footer__social {
    display: flex;
    gap: var(--space-md);
}

.footer__social-link {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: 1.125rem;
    transition: all var(--transition-base);
}

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

.footer__title {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: var(--fw-semibold);
    color: var(--color-white);
    margin-bottom: var(--space-lg);
    position: relative;
    padding-bottom: var(--space-md);
}

.footer__title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--color-accent);
    border-radius: 2px;
}

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

.footer__links a {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
}

.footer__links a i {
    font-size: 0.625rem;
    transition: transform var(--transition-fast);
}

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

.footer__links a:hover i {
    transform: translateX(3px);
}

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

.footer__contact li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
}

.footer__contact li i {
    color: var(--color-accent);
    margin-top: 4px;
}

.footer__contact a {
    color: rgba(255, 255, 255, 0.7);
}

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

/* Footer Bottom */
.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-lg) 0;
}

.footer__bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer__copyright {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
    margin: 0;
}

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

.footer__legal a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

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

/* ==========================================
   BACK TO TOP
   ========================================== */
.back-to-top {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 50px;
    height: 50px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: var(--z-fixed);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-accent);
    transform: translateY(-3px);
}

/* ==========================================
   PAGE HERO (For Inner Pages)
   ========================================== */
.page-hero {
    padding: calc(var(--header-height) + var(--space-4xl)) 0 var(--space-4xl);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 50px 50px;
}

.page-hero__content {
    position: relative;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.page-hero__title {
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

.page-hero__desc {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-lg);
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.6);
}

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

.breadcrumb__separator {
    font-size: 0.625rem;
}

.breadcrumb__current {
    color: var(--color-accent);
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 1200px) {
    .hero__content {
        gap: var(--space-2xl);
    }
    
    .stats__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-item:nth-child(2)::after {
        display: none;
    }
}

@media (max-width: 992px) {
    .header__menu-btn {
        display: block;
    }
    
    .header__nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-white);
        flex-direction: column;
        justify-content: flex-start;
        padding: var(--space-2xl);
        transform: translateX(100%);
        transition: transform var(--transition-base);
        overflow-y: auto;
    }
    
    .header__nav.active {
        transform: translateX(0);
    }
    
    .header__nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        width: 100%;
    }
    
    .header__nav-item {
        border-bottom: 1px solid var(--color-gray-100);
    }
    
    .header__nav-link {
        display: block;
        padding: var(--space-lg) 0;
        font-size: 1.125rem;
    }
    
    .header__cta {
        margin-top: var(--space-xl);
        width: 100%;
        justify-content: center;
    }
    
    .hero__content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero__desc {
        margin: 0 auto var(--space-xl);
    }
    
    .hero__buttons {
        justify-content: center;
    }
    
    .hero__visual {
        display: none;
    }
    
    .about__content {
        grid-template-columns: 1fr;
    }
    
    .contact__grid {
        grid-template-columns: 1fr;
    }
    
    .footer__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
    }
    
    .section {
        padding: var(--space-3xl) 0;
    }
    
    .about__features {
        grid-template-columns: 1fr;
    }
    
    .services__grid {
        grid-template-columns: 1fr;
    }
    
    .stats__grid {
        grid-template-columns: 1fr;
    }
    
    .stat-item::after {
        display: none;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer__grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .footer__col--brand {
        padding-right: 0;
    }
    
    .footer__bottom-inner {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero__buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero__buttons .btn {
        width: 100%;
    }
    
    .contact__info,
    .contact__form-wrapper {
        padding: var(--space-xl);
    }
    
    .reference-card {
        aspect-ratio: 16/12;
    }
}

/* ==========================================
   ANIMATIONS
   ========================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-fadeIn {
    animation: fadeIn 0.6s ease forwards;
}

/* Animation Delays */
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }
.delay-500 { animation-delay: 500ms; }

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-auto { margin-top: auto; }
.mb-auto { margin-bottom: auto; }

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}