/* ============================================
   YAPI İNŞAAT — CSS Design System
   Foster + Partners Inspired
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    --color-bg: #0a0a0a;
    --color-bg-alt: #111111;
    --color-bg-card: #161616;
    --color-surface: #1a1a1a;
    --color-border: rgba(255,255,255,0.08);
    --color-text: #f0f0f0;
    --color-text-muted: #999999;
    --color-text-light: #cccccc;
    --color-accent: #c8a96e;
    --color-accent-hover: #dbb978;
    --color-white: #ffffff;
    --color-overlay: rgba(0,0,0,0.55);

    --font-primary: 'Outfit', sans-serif;
    --font-secondary: 'Inter', sans-serif;

    --fs-hero: clamp(3rem, 7vw, 6.5rem);
    --fs-h2: clamp(2rem, 4vw, 3.5rem);
    --fs-h3: clamp(1.2rem, 2vw, 1.6rem);
    --fs-body: clamp(0.95rem, 1.1vw, 1.1rem);
    --fs-small: 0.85rem;
    --fs-label: 0.75rem;

    --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-slow: 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);

    --container-max: 1400px;
    --section-padding: clamp(80px, 10vw, 160px);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-secondary);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

button, input, textarea {
    font-family: inherit;
    border: none;
    outline: none;
    background: none;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 clamp(20px, 4vw, 60px);
}

/* --- Selection --- */
::selection {
    background: var(--color-accent);
    color: var(--color-bg);
}

/* ============================================
   HEADER
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 0 clamp(20px, 4vw, 60px);
    transition: background var(--transition), padding var(--transition), backdrop-filter var(--transition);
}

.header.scrolled {
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: baseline;
    gap: 8px;
    z-index: 1001;
}

.logo-text {
    font-family: var(--font-primary);
    font-weight: 700;
    font-size: 1.6rem;
    letter-spacing: 6px;
    color: var(--color-white);
}

.logo-sub {
    font-family: var(--font-primary);
    font-weight: 300;
    font-size: 0.75rem;
    letter-spacing: 4px;
    color: var(--color-accent);
    text-transform: uppercase;
}

/* Nav */
.nav-list {
    display: flex;
    gap: 36px;
}

.nav-link {
    font-family: var(--font-primary);
    font-size: var(--fs-small);
    font-weight: 400;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-text-muted);
    position: relative;
    padding: 4px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width var(--transition);
}

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

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

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 1001;
    padding: 8px;
}

.hamburger span {
    display: block;
    width: 28px;
    height: 1.5px;
    background: var(--color-white);
    transition: var(--transition);
    transform-origin: center;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    overflow: hidden;
}

.hero-slides {
    position: relative;
    width: 100%;
    height: 100%;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1.2s ease;
    pointer-events: none;
}

.hero-slide.active {
    opacity: 1;
    pointer-events: all;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-color: #1a1a1a;
    transform: scale(1.05);
    transition: transform 8s ease;
}

.hero-slide.active .hero-bg {
    transform: scale(1);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.6) 100%);
}

.hero-content {
    position: absolute;
    bottom: 15%;
    left: clamp(20px, 4vw, 60px);
    max-width: 700px;
    z-index: 2;
}

.hero-label {
    font-family: var(--font-primary);
    font-size: var(--fs-label);
    font-weight: 500;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 20px;
}

.hero-title {
    font-family: var(--font-primary);
    font-size: var(--fs-hero);
    font-weight: 700;
    line-height: 1.05;
    color: var(--color-white);
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-desc {
    font-size: var(--fs-body);
    color: var(--color-text-light);
    max-width: 480px;
    margin-bottom: 36px;
    line-height: 1.8;
}

.hero-btn {
    display: inline-block;
    font-family: var(--font-primary);
    font-size: var(--fs-small);
    font-weight: 500;
    letter-spacing: 3px;
    text-transform: uppercase;
    padding: 16px 40px;
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.hero-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--color-accent);
    transition: left var(--transition);
    z-index: -1;
}

.hero-btn:hover {
    color: var(--color-bg);
}

.hero-btn:hover::before {
    left: 0;
}

/* Hero Navigation Dots */
.hero-nav {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.hero-nav-btn {
    width: 40px;
    height: 3px;
    background: rgba(255,255,255,0.3);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.hero-nav-btn.active {
    background: var(--color-accent);
    width: 60px;
}

/* Scroll indicator */
.hero-scroll {
    position: absolute;
    right: clamp(20px, 4vw, 60px);
    bottom: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    z-index: 10;
}

.hero-scroll span {
    font-size: 0.65rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-text-muted);
    writing-mode: vertical-rl;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollPulse 2s ease infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 1; transform: scaleY(1); }
    50% { opacity: 0.3; transform: scaleY(0.6); }
}

/* Hero text animations */
.anim-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.hero-slide.active .anim-up {
    opacity: 1;
    transform: translateY(0);
}

.hero-slide.active .anim-up:nth-child(1) { transition-delay: 0.2s; }
.hero-slide.active .anim-up:nth-child(2) { transition-delay: 0.4s; }
.hero-slide.active .anim-up:nth-child(3) { transition-delay: 0.6s; }
.hero-slide.active .anim-up:nth-child(4) { transition-delay: 0.8s; }

/* ============================================
   SECTIONS COMMON
   ============================================ */
.section {
    padding: var(--section-padding) 0;
}

.section-label {
    font-family: var(--font-primary);
    font-size: var(--fs-label);
    font-weight: 500;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 20px;
}

.section-title {
    font-family: var(--font-primary);
    font-size: var(--fs-h2);
    font-weight: 600;
    line-height: 1.15;
    color: var(--color-white);
    letter-spacing: -0.5px;
}

.section-text {
    font-size: var(--fs-body);
    color: var(--color-text-muted);
    line-height: 1.9;
    margin-bottom: 16px;
}

.section-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.section-header {
    margin-bottom: 60px;
}

/* Reveal animation */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   ABOUT STATS
   ============================================ */
.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-top: 80px;
    padding-top: 60px;
    border-top: 1px solid var(--color-border);
}

.stat {
    text-align: center;
}

.stat-number {
    font-family: var(--font-primary);
    font-size: clamp(2.5rem, 4vw, 4rem);
    font-weight: 700;
    color: var(--color-white);
    display: inline;
}

.stat-plus {
    font-family: var(--font-primary);
    font-size: clamp(1.5rem, 2.5vw, 2.5rem);
    font-weight: 300;
    color: var(--color-accent);
}

.stat-label {
    display: block;
    font-size: var(--fs-small);
    color: var(--color-text-muted);
    margin-top: 8px;
    letter-spacing: 1px;
}

/* ============================================
   QUOTE
   ============================================ */
.quote-section {
    padding: var(--section-padding) 0;
    background: var(--color-bg-alt);
}

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

.quote p {
    font-family: var(--font-primary);
    font-size: clamp(1.4rem, 2.5vw, 2.2rem);
    font-weight: 300;
    line-height: 1.6;
    color: var(--color-text-light);
    font-style: italic;
}

.quote cite {
    display: block;
    margin-top: 24px;
    font-size: var(--fs-small);
    font-style: normal;
    color: var(--color-accent);
    letter-spacing: 3px;
    text-transform: uppercase;
}

/* ============================================
   PROJECTS GRID
   ============================================ */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.project-card {
    position: relative;
    display: block;
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 4/3;
}

.project-card.large {
    grid-column: span 2;
    aspect-ratio: 16/9;
}

.project-img {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.project-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
    background-color: #222;
}

.project-card:hover .project-img img {
    transform: scale(1.08);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(0deg, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0) 60%);
    transition: background var(--transition);
}

.project-card:hover .project-overlay {
    background: linear-gradient(0deg, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.2) 60%);
}

.project-info {
    position: absolute;
    bottom: 0;
    left: 0;
    padding: 30px;
    z-index: 2;
    transform: translateY(10px);
    transition: transform var(--transition);
}

.project-card:hover .project-info {
    transform: translateY(0);
}

.project-category {
    font-size: var(--fs-label);
    font-weight: 500;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 8px;
    display: block;
}

.project-name {
    font-family: var(--font-primary);
    font-size: var(--fs-h3);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 4px;
}

.project-location {
    font-size: var(--fs-small);
    color: var(--color-text-muted);
}

.projects-cta {
    text-align: center;
    margin-top: 60px;
}

.btn-outline {
    display: inline-block;
    font-family: var(--font-primary);
    font-size: var(--fs-small);
    font-weight: 500;
    letter-spacing: 3px;
    text-transform: uppercase;
    padding: 16px 48px;
    border: 1px solid var(--color-border);
    color: var(--color-text-light);
    transition: var(--transition);
}

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

/* Project Filter */
.projects-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 40px;
}

.filter-btn {
    font-family: var(--font-primary);
    font-size: var(--fs-small);
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding: 10px 24px;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: var(--transition);
    background: transparent;
}

.filter-btn:hover,
.filter-btn.active {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: rgba(200, 169, 110, 0.08);
}

.project-card.hidden {
    display: none;
}

/* ============================================
   SOSYAL SORUMLULUK
   ============================================ */
.social-responsibility {
    background: var(--color-bg-alt);
}

.sr-card {
    padding: 40px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-left: 3px solid var(--color-accent);
    transition: var(--transition);
}

.sr-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-3px);
}

.sr-icon {
    width: 56px;
    height: 56px;
    margin-bottom: 24px;
    color: var(--color-accent);
}

.sr-icon svg {
    width: 100%;
    height: 100%;
}

.sr-title {
    font-family: var(--font-primary);
    font-size: var(--fs-h3);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 16px;
}

/* ============================================
   CAREERS / İNSAN KAYNAKLARI
   ============================================ */
.careers {
    background: var(--color-bg-alt);
}

.careers-highlights {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.career-highlight {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: var(--fs-body);
    color: var(--color-text-light);
}

.career-highlight-icon {
    color: var(--color-accent);
    font-size: 0.9rem;
}

.careers-form-title {
    font-family: var(--font-primary);
    font-size: var(--fs-h3);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 24px;
}

.form-group select {
    padding: 14px 18px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-size: var(--fs-body);
    transition: border-color var(--transition);
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23999' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 12px;
    cursor: pointer;
}

.form-group select:focus {
    border-color: var(--color-accent);
}

/* ============================================
   EXPERTISE GRID
   ============================================ */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.expertise-card {
    padding: 50px 36px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.expertise-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.expertise-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-5px);
}

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

.expertise-icon {
    width: 56px;
    height: 56px;
    margin-bottom: 28px;
    color: var(--color-accent);
}

.expertise-icon svg {
    width: 100%;
    height: 100%;
}

.expertise-title {
    font-family: var(--font-primary);
    font-size: var(--fs-h3);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 14px;
}

.expertise-text {
    font-size: var(--fs-body);
    color: var(--color-text-muted);
    line-height: 1.8;
}

/* ============================================
   PARALLAX BANNER
   ============================================ */
.parallax-banner {
    position: relative;
    height: 70vh;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.parallax-bg {
    position: absolute;
    top: -20%;
    left: 0;
    width: 100%;
    height: 140%;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-color: #1a1a1a;
}

.parallax-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
}

.parallax-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.parallax-content h2 {
    font-family: var(--font-primary);
    font-size: var(--fs-h2);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 16px;
}

.parallax-content p {
    font-size: var(--fs-body);
    color: var(--color-text-light);
    margin-bottom: 36px;
}

/* ============================================
   NEWS
   ============================================ */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    overflow: hidden;
    transition: var(--transition);
}

.news-card:hover {
    border-color: rgba(255,255,255,0.15);
    transform: translateY(-4px);
}

.news-img {
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.news-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
    background-color: #222;
}

.news-card:hover .news-img img {
    transform: scale(1.06);
}

.news-body {
    padding: 28px;
}

.news-date {
    font-size: var(--fs-label);
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 12px;
    display: block;
}

.news-title {
    font-family: var(--font-primary);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 12px;
    line-height: 1.4;
}

.news-excerpt {
    font-size: var(--fs-small);
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: 16px;
}

.news-link {
    font-family: var(--font-primary);
    font-size: var(--fs-small);
    color: var(--color-accent);
    letter-spacing: 1px;
    transition: var(--transition);
}

.news-card:hover .news-link {
    letter-spacing: 3px;
}

/* ============================================
   CONTACT
   ============================================ */
.contact {
    background: var(--color-bg-alt);
}

.contact-grid {
    align-items: start;
}

.contact-info {
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.contact-item-label {
    font-family: var(--font-primary);
    font-size: var(--fs-label);
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 6px;
    display: block;
}

.contact-item p {
    font-size: var(--fs-body);
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-family: var(--font-primary);
    font-size: var(--fs-label);
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.form-group input,
.form-group textarea {
    padding: 14px 18px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-size: var(--fs-body);
    transition: border-color var(--transition);
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-accent);
}

.btn-submit {
    font-family: var(--font-primary);
    font-size: var(--fs-small);
    font-weight: 500;
    letter-spacing: 3px;
    text-transform: uppercase;
    padding: 18px 48px;
    background: var(--color-accent);
    color: var(--color-bg);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--color-accent);
    align-self: flex-start;
}

.btn-submit:hover {
    background: transparent;
    color: var(--color-accent);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: 80px 0 0;
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
}

.footer-top {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 80px;
    padding-bottom: 60px;
}

.footer-desc {
    margin-top: 16px;
    font-size: var(--fs-small);
    color: var(--color-text-muted);
    line-height: 1.7;
    max-width: 300px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-col h4 {
    font-family: var(--font-primary);
    font-size: var(--fs-small);
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-white);
    margin-bottom: 20px;
}

.footer-col li {
    margin-bottom: 10px;
}

.footer-col a {
    font-size: var(--fs-small);
    color: var(--color-text-muted);
    transition: color var(--transition);
}

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

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0;
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: var(--fs-small);
    color: var(--color-text-muted);
}

.back-to-top {
    font-family: var(--font-primary);
    font-size: var(--fs-small);
    color: var(--color-text-muted);
    letter-spacing: 2px;
    transition: color var(--transition);
}

.back-to-top:hover {
    color: var(--color-accent);
}

/* ============================================
   RESPONSIVE
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
    .nav {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .nav.open {
        display: flex;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(10, 10, 10, 0.97);
        backdrop-filter: blur(30px);
        -webkit-backdrop-filter: blur(30px);
        align-items: center;
        justify-content: center;
        z-index: 999;
        animation: fadeIn 0.3s ease;
    }

    .nav.open .nav-list {
        flex-direction: column;
        text-align: center;
        gap: 28px;
    }

    .nav.open .nav-link {
        font-size: 1.4rem;
        letter-spacing: 4px;
    }

    .section-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .project-card.large {
        grid-column: span 2;
    }

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

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

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

    .footer-top {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

/* Mobile */
@media (max-width: 640px) {
    .hero-content {
        bottom: 20%;
        left: 20px;
        right: 20px;
    }

    .hero-title {
        font-size: clamp(2rem, 10vw, 3.5rem);
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .project-card.large {
        grid-column: span 1;
    }

    .expertise-grid {
        grid-template-columns: 1fr;
    }

    .news-grid {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

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

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .hero-scroll {
        display: none;
    }

    .parallax-bg {
        background-attachment: scroll;
    }
}

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

/* Smooth scrollbar (Webkit) */
::-webkit-scrollbar {
    width: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--color-accent);
    border-radius: 3px;
}

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