/* Design System */
:root {
    --primary-h: 210;
    --primary-s: 100%;
    --primary-l: 25%;
    
    --accent-h: 45;
    --accent-s: 90%;
    --accent-l: 50%;
    
    --primary: hsl(var(--primary-h), var(--primary-s), var(--primary-l));
    --primary-light: hsl(var(--primary-h), var(--primary-s), 40%);
    --primary-dark: hsl(var(--primary-h), var(--primary-s), 15%);
    
    --accent: hsl(var(--accent-h), var(--accent-s), var(--accent-l));
    --accent-dark: hsl(var(--accent-h), var(--accent-s), 40%);
    
    --text-main: #333;
    --text-light: #666;
    --bg-light: #f9f9f9;
    --white: #ffffff;
    --black: #111111;
    
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius: 8px;
    --container: 1200px;
}

/* Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-family: 'Montserrat', sans-serif;
    color: var(--primary-dark);
}

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

ul {
    list-style: none;
}

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

/* Utility Classes */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 20px;
}

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

.grid {
    display: grid;
}

.col-2 { grid-template-columns: repeat(2, 1fr); }
.col-3 { grid-template-columns: repeat(3, 1fr); }
.col-4 { grid-template-columns: repeat(4, 1fr); }

.gap-2 { gap: 20px; }
.gap-3 { gap: 30px; }
.gap-4 { gap: 40px; }

.text-center { text-align: center; }
.text-right { text-align: right; }
.items-center { align-items: center; }

.section-header {
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--accent);
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: var(--radius);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    border: none;
}

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

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

.btn-accent {
    background: var(--accent);
    color: var(--black);
}

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

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

/* WhatsApp Button */
.whatsapp-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
}

.whatsapp-btn a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: #25d366;
    color: white;
    border-radius: 50%;
    font-size: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7); }
    70% { transform: scale(1.05); box-shadow: 0 0 0 15px rgba(37, 211, 102, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

/* Header */
header {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
}

.top-bar {
    background: var(--primary-dark);
    color: var(--white);
    padding: 8px 0;
    font-size: 0.85rem;
}

.top-bar .contact-info span {
    margin-right: 20px;
}

.top-bar .contact-info i {
    color: var(--accent);
    margin-right: 5px;
}

.social-links a {
    margin-left: 15px;
    font-size: 1rem;
}

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

.main-nav {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    transition: var(--transition);
}

.main-nav.sticky {
    position: fixed;
    top: 0;
    width: 100%;
    box-shadow: var(--shadow);
}

.logo img {
    height: 50px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    font-weight: 600;
    color: var(--primary-dark);
    text-transform: uppercase;
    font-size: 0.9rem;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 30px;
    height: 3px;
    background: var(--primary-dark);
    border-radius: 2px;
}

/* Hero Section */
.hero {
    height: 100vh;
    position: relative;
    overflow: hidden;
}

.hero-slider {
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide.active {
    opacity: 1;
}

.slide img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
}

.slide::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    color: var(--white);
    max-width: 800px;
    padding: 0 20px;
}

.hero-content h1 {
    font-size: 4rem;
    color: var(--white);
    margin-bottom: 20px;
    text-shadow: 2px 2px 10px rgba(0,0,0,0.5);
}

.hero-content .subtitle {
    font-size: 1.2rem;
    color: var(--accent);
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: 2px;
}

.hero-badge {
    height: 80px;
    margin-top: 20px;
}

.hero-controls button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    padding: 15px;
    font-size: 20px;
    cursor: pointer;
    z-index: 10;
    transition: var(--transition);
}

.hero-controls button:hover {
    background: var(--accent);
    color: var(--black);
}

.hero-controls .prev { left: 20px; }
.hero-controls .next { right: 20px; }

/* Features */
.features {
    padding: 80px 0;
    background: var(--bg-light);
}

.feature-card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius);
    transition: var(--transition);
    border-bottom: 4px solid transparent;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow);
    border-bottom-color: var(--accent);
}

.feature-card .icon-wrap {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 20px;
}

/* About */
.about {
    padding: 100px 0;
}

.img-rounded {
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.check-list li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 30px;
}

.check-list li::before {
    content: '\f00c';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--accent);
}

.tabs {
    margin-top: 30px;
}

.tab-header {
    display: flex;
    border-bottom: 1px solid #ddd;
    margin-bottom: 20px;
}

.tab-btn {
    padding: 10px 20px;
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-light);
    transition: var(--transition);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom: 2px solid var(--accent);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

/* Services */
.services {
    padding: 100px 0;
    background: #f0f2f5;
}

.service-card {
    height: 400px;
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    cursor: pointer;
}

.service-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.service-info {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 30px;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: var(--white);
    transform: translateY(20px);
    transition: var(--transition);
}

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

.service-info h3 {
    color: var(--accent);
    margin-bottom: 10px;
}

/* Portfolio */
.portfolio {
    padding: 100px 0;
}

.filter-controls {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}

.filter-btn {
    padding: 8px 20px;
    border: 1px solid #ddd;
    border-radius: 20px;
    background: none;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn.active, .filter-btn:hover {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.project-item {
    transition: var(--transition);
}

.project-inner {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    aspect-ratio: 1;
}

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 31, 63, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: var(--white);
    opacity: 0;
    transition: var(--transition);
    text-align: center;
}

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

/* CTA */
.cta {
    padding: 60px 0;
    background: var(--primary);
    color: var(--white);
}

.cta h2 { color: var(--white); }

/* Footer */
footer {
    padding: 80px 0 20px;
    background: var(--primary-dark);
    color: rgba(255,255,255,0.7);
}

footer h3 {
    color: var(--white);
    margin-bottom: 25px;
    font-size: 1.2rem;
}

.footer-logo {
    height: 40px;
    margin-bottom: 20px;
}

footer ul li {
    margin-bottom: 15px;
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

footer i {
    color: var(--accent);
    margin-top: 5px;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--white);
}

.social-icons a:hover {
    background: var(--accent);
    color: var(--black);
}

.footer-bottom {
    margin-top: 60px;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.05);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 992px) {
    .col-4 { grid-template-columns: repeat(2, 1fr); }
    .col-3 { grid-template-columns: repeat(2, 1fr); }
    .hero-content h1 { font-size: 3rem; }
}

/* Animations */
.animate-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-scroll.fade-in {
    opacity: 1;
    transform: translateY(0);
}

.animate-up {
    animation: fadeInUp 1s forwards;
}

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

/* More Responsive Tweaks */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: auto;
        background: var(--white);
        flex-direction: column;
        padding: 40px 0;
        transition: 0.5s;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }

    .nav-links.show {
        left: 0;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .hero-content h1 { font-size: 2.5rem; text-align: center; }
    .hero-content .subtitle { text-align: center; }
}

.project-item {
    transition: opacity 0.3s ease, transform 0.3s ease;
}