/* ============================================
   COLUMBUS WALLPAPER INSTALLER - STYLES
   Premium, Luxury, Responsive Design
   ============================================ */

/* === CSS VARIABLES === */
:root {
    --color-white: #ffffff;
    --color-warm-gray: #f5f0eb;
    --color-beige: #e8e0d5;
    --color-charcoal: #2d2d2d;
    --color-black: #1a1a1a;
    --color-gold: #c9a96e;
    --color-gold-light: #d4b87a;
    --color-gold-dark: #b8944f;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-text-muted: #999999;
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
    --font-accent: 'Cormorant Garamond', serif;
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

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

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

ul {
    list-style: none;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-charcoal);
}

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

.section-tag {
    display: inline-block;
    font-family: var(--font-accent);
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-gold);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 16px;
    position: relative;
    padding: 0 20px;
}

.section-tag::before,
.section-tag::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40px;
    height: 1px;
    background: var(--color-gold);
}

.section-tag::before { left: -40px; }
.section-tag::after { right: -40px; }

.section-title {
    font-size: 2.8rem;
    margin-bottom: 16px;
    color: var(--color-charcoal);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-transform: none;
    letter-spacing: 0.3px;
}

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

.btn-primary:hover {
    background: var(--color-gold-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(201, 169, 110, 0.4);
}

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

.btn-outline:hover {
    background: var(--color-white);
    color: var(--color-charcoal);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 16px 40px;
    font-size: 1rem;
}

.btn-full {
    width: 100%;
}

/* === HEADER === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
    padding: 10px 0;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.logo-img {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    object-fit: cover;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-white);
    transition: var(--transition);
}

.header.scrolled .logo-text {
    color: var(--color-charcoal);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

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

.header.scrolled .nav-link {
    color: var(--color-text);
}

.header.scrolled .nav-link:hover,
.header.scrolled .nav-link.active {
    color: var(--color-gold);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.header-phone:hover {
    color: var(--color-gold);
}

.header.scrolled .header-phone {
    color: var(--color-text);
}

.header.scrolled .header-phone:hover {
    color: var(--color-gold);
}

.header.scrolled .cta-btn {
    background: var(--color-gold);
    color: var(--color-white);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.mobile-toggle span {
    display: block;
    width: 28px;
    height: 2px;
    background: var(--color-white);
    transition: var(--transition);
    border-radius: 2px;
}

.header.scrolled .mobile-toggle span {
    background: var(--color-charcoal);
}

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

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

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

/* === HERO SECTION === */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.85) 0%, rgba(45, 45, 45, 0.7) 50%, rgba(26, 26, 26, 0.8) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 750px;
    padding: 120px 0 60px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 24px;
    line-height: 1.2;
    animation: fadeInUp 1s ease forwards;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 36px;
    line-height: 1.8;
    animation: fadeInUp 1s ease 0.2s forwards;
    opacity: 0;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 36px;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.4s forwards;
    opacity: 0;
}

.hero-contact-info {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    animation: fadeInUp 1s ease 0.6s forwards;
    opacity: 0;
}

.hero-contact-info span {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

.hero-contact-info i {
    color: var(--color-gold);
}

.hero-stats {
    position: relative;
    z-index: 2;
    display: flex;
    gap: 0;
    margin-top: auto;
    padding-bottom: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item {
    flex: 1;
    text-align: center;
    padding: 32px 24px;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item:last-child {
    border-right: none;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-gold);
    display: inline;
}

.stat-suffix {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--color-gold);
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* === ABOUT SECTION === */
.about {
    padding: 120px 0;
    background: var(--color-white);
}

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

.about-lead {
    font-size: 1.1rem;
    line-height: 1.9;
    color: var(--color-text);
    margin-bottom: 20px;
}

.about-content p {
    margin-bottom: 16px;
    color: var(--color-text-light);
    line-height: 1.8;
}

.about-expertise {
    margin-top: 32px;
}

.about-expertise h3 {
    font-size: 1.3rem;
    margin-bottom: 16px;
    color: var(--color-charcoal);
}

.expertise-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag {
    display: inline-block;
    padding: 8px 18px;
    background: var(--color-warm-gray);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-charcoal);
    transition: var(--transition);
}

.tag:hover {
    background: var(--color-gold);
    color: var(--color-white);
    transform: translateY(-2px);
}

.about-img-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.about-img-wrapper {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-img-wrapper:first-child {
    margin-top: 40px;
}

.about-img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: var(--transition-slow);
}

.about-img-wrapper:hover .about-img {
    transform: scale(1.05);
}

/* === SERVICES SECTION === */
.services {
    padding: 120px 0;
    background: var(--color-warm-gray);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
}

.service-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-gold), var(--color-gold-light));
    transform: scaleX(0);
    transition: var(--transition);
}

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

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

.service-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--color-warm-gray), var(--color-beige));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: var(--color-gold);
    transition: var(--transition);
}

.service-card:hover .service-icon {
    background: var(--color-gold);
    color: var(--color-white);
    transform: scale(1.1);
}

.service-card h3 {
    font-size: 1.15rem;
    margin-bottom: 12px;
    color: var(--color-charcoal);
}

.service-card p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* === PORTFOLIO SECTION === */
.portfolio {
    padding: 120px 0;
    background: var(--color-white);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.portfolio-item {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 1;
}

.portfolio-item.large {
    grid-column: span 2;
    grid-row: span 2;
    aspect-ratio: auto;
}

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

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(26, 26, 26, 0.9) 0%, rgba(26, 26, 26, 0.2) 60%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 24px;
    opacity: 0;
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-item:hover .portfolio-img {
    transform: scale(1.08);
}

.portfolio-overlay h3 {
    font-size: 1.2rem;
    color: var(--color-white);
    margin-bottom: 4px;
}

.portfolio-overlay p {
    font-size: 0.85rem;
    color: var(--color-gold);
    font-weight: 500;
}

/* === PROCESS SECTION === */
.process {
    padding: 120px 0;
    background: var(--color-charcoal);
    color: var(--color-white);
}

.process .section-title {
    color: var(--color-white);
}

.process .section-subtitle {
    color: rgba(255, 255, 255, 0.7);
}

.process-steps {
    max-width: 700px;
    margin: 0 auto;
}

.process-step {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 32px 0;
    position: relative;
}

.process-step:last-child .step-arrow {
    display: none;
}

.step-number {
    width: 60px;
    height: 60px;
    min-width: 60px;
    background: linear-gradient(135deg, var(--color-gold), var(--color-gold-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-white);
}

.step-content h3 {
    font-size: 1.3rem;
    color: var(--color-white);
    margin-bottom: 8px;
}

.step-content p {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
}

.step-arrow {
    position: absolute;
    right: 0;
    color: var(--color-gold);
    opacity: 0.4;
    font-size: 1.2rem;
}

/* === WHY CHOOSE US SECTION === */
.why-choose-us {
    padding: 120px 0;
    background: var(--color-white);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.why-card {
    text-align: center;
    padding: 40px 28px;
    border-radius: var(--radius-lg);
    background: var(--color-warm-gray);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.why-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    background: var(--color-white);
}

.why-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--color-gold);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.why-card:hover .why-icon {
    background: var(--color-gold);
    color: var(--color-white);
}

.why-card h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    color: var(--color-charcoal);
}

.why-card p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* === FAQ SECTION === */
.faq {
    padding: 120px 0;
    background: var(--color-warm-gray);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--color-white);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 22px 28px;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-charcoal);
    transition: var(--transition);
    gap: 16px;
}

.faq-question:hover {
    color: var(--color-gold);
}

.faq-question i {
    font-size: 0.9rem;
    color: var(--color-gold);
    transition: var(--transition);
    flex-shrink: 0;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.faq-answer p {
    padding: 0 28px 22px;
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

/* === SERVICE AREA SECTION === */
.service-area {
    padding: 80px 0;
    background: var(--color-white);
}

.areas-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    max-width: 900px;
    margin: 0 auto;
}

.area-card {
    padding: 10px 24px;
    background: var(--color-warm-gray);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-charcoal);
    transition: var(--transition);
}

.area-card:hover {
    background: var(--color-gold);
    color: var(--color-white);
    transform: translateY(-2px);
}

/* === MAP SECTION === */
.map-section {
    padding: 80px 0;
    background: var(--color-warm-gray);
}

.map-wrapper {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    margin-bottom: 24px;
}

.map-link {
    text-align: center;
}

/* === CONTACT SECTION === */
.contact {
    padding: 120px 0;
    background: var(--color-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: var(--color-warm-gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gold);
    font-size: 1rem;
    transition: var(--transition);
}

.contact-item:hover .contact-icon {
    background: var(--color-gold);
    color: var(--color-white);
}

.contact-text h4 {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-muted);
    margin-bottom: 4px;
}

.contact-text p {
    font-size: 0.95rem;
    color: var(--color-text);
    line-height: 1.6;
}

.contact-text a {
    color: var(--color-text);
    transition: var(--transition);
}

.contact-text a:hover {
    color: var(--color-gold);
}

.contact-form-wrapper {
    background: var(--color-warm-gray);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-charcoal);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--color-beige);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--color-text);
    background: var(--color-white);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-gold);
    box-shadow: 0 0 0 4px rgba(201, 169, 110, 0.1);
}

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

.form-success {
    text-align: center;
    padding: 60px 20px;
}

.form-success i {
    font-size: 3rem;
    color: #4caf50;
    margin-bottom: 16px;
}

.form-success h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
    color: var(--color-charcoal);
}

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

/* === FOOTER === */
.footer {
    background: var(--color-black);
    color: rgba(255, 255, 255, 0.7);
    padding: 80px 0 0;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo-img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.footer-logo h3 {
    font-size: 1.2rem;
    color: var(--color-white);
}

.footer-desc {
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 24px;
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-contact p {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}

.footer-contact i {
    color: var(--color-gold);
    width: 16px;
    text-align: center;
}

.footer-contact a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-contact a:hover {
    color: var(--color-gold);
}

.footer-col h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--color-white);
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
    padding-left: 0;
}

.footer-links a:hover {
    color: var(--color-gold);
    padding-left: 8px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 24px 0;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
}

/* === SCROLL TO TOP === */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--color-gold);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--color-gold-dark);
    transform: translateY(-4px);
}

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

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

.animate-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 1024px) {
    .section-title {
        font-size: 2.3rem;
    }

    .about-grid {
        gap: 40px;
    }

    .portfolio-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .portfolio-item.large {
        grid-column: span 1;
        grid-row: span 1;
        aspect-ratio: 1;
    }

    .why-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background: var(--color-white);
        padding: 80px 30px 30px;
        transition: var(--transition);
        box-shadow: var(--shadow-xl);
    }

    .nav.active {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        gap: 4px;
    }

    .nav-link {
        color: var(--color-text) !important;
        padding: 14px 16px;
        font-size: 1rem;
        border-radius: var(--radius-sm);
        transition: var(--transition);
    }

    .nav-link:hover,
    .nav-link.active {
        background: var(--color-warm-gray);
        color: var(--color-gold) !important;
    }

    .mobile-toggle {
        display: flex;
    }

    .header-actions {
        display: none;
    }

    .header.scrolled .header-actions {
        display: flex;
    }

    .hero-title {
        font-size: 2.4rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-contact-info {
        flex-direction: column;
        gap: 12px;
    }

    .hero-stats {
        flex-direction: column;
    }

    .stat-item {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        padding: 20px;
    }

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

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

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

    .section-title {
        font-size: 2rem;
    }

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

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

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

    .process-step {
        padding: 24px 0;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.9rem;
    }

    .section-title {
        font-size: 1.7rem;
    }

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

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

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

    .about-img-grid {
        grid-template-columns: 1fr;
    }

    .about-img-wrapper:first-child {
        margin-top: 0;
    }

    .contact-form-wrapper {
        padding: 24px;
    }

    .cta-btn {
        display: none;
    }

    .section-tag::before,
    .section-tag::after {
        display: none;
    }
}

/* === GLASSMORPHISM EFFECTS === */
.glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

/* === PARALLAX === */
.parallax-bg {
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

/* === SELECTION STYLE === */
::selection {
    background: var(--color-gold);
    color: var(--color-white);
}

::-moz-selection {
    background: var(--color-gold);
    color: var(--color-white);
}

/* === SCROLLBAR === */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--color-gold);
    border-radius: 4px;
}

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