:root {
    --clr-primary: #ff6b35;
    --clr-secondary: #f7931e;
    --clr-accent: #4ecdc4;
    --clr-bg: #1a2332;
    --clr-surface: #243447;
    --clr-surface-light: #2d4057;
    --clr-text: #ffffff;
    --clr-text-muted: #a8b5c8;
    --shadow-glow: 0 0 30px rgba(255, 107, 53, 0.3);
}

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

body {
    font-family: 'Manrope', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--clr-bg);
    color: var(--clr-text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* === NAVIGATION === */
.sticky-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(26, 35, 50, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--clr-primary);
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--clr-primary);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    color: var(--clr-text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--clr-primary);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--clr-text);
}

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

.nav-cta {
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-glow);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(255, 107, 53, 0.5);
}

/* === HERO SECTION === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 8rem 2rem 4rem;
    background: linear-gradient(135deg, #1a2332 0%, #243447 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(255, 107, 53, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(78, 205, 196, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

/* Topographic lines */
.hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg stroke='%23ff6b35' stroke-width='0.5' stroke-opacity='0.2'%3E%3Cpath d='M10 10c0-2.21 1.79-4 4-4s4 1.79 4 4-1.79 4-4 4-4-1.79-4-4zm20 0c0-2.21 1.79-4 4-4s4 1.79 4 4-1.79 4-4 4-4-1.79-4-4zm20 0c0-2.21 1.79-4 4-4s4 1.79 4 4-1.79 4-4 4-4-1.79-4-4z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    animation: topoMove 60s linear infinite;
    opacity: 0.3;
}

@keyframes topoMove {
    from { transform: translateX(0) translateY(0); }
    to { transform: translateX(-60px) translateY(-60px); }
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 2;
}

@media (min-width: 768px) {
    .hero-container {
        grid-template-columns: 1fr 1fr;
    }
}

.hero-content h2 {
    font-size: 1.25rem;
    color: var(--clr-accent);
    font-weight: 600;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@media (min-width: 768px) {
    .hero-content h1 {
        font-size: 4.5rem;
    }
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--clr-text-muted);
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
    color: white;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-glow);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255, 107, 53, 0.4);
}

.btn-secondary {
    color: var(--clr-accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    color: var(--clr-primary);
    transform: translateX(5px);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    width: 300px;
    height: auto;
    border-radius: 30px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transform: rotate(-5deg);
    transition: transform 0.5s ease;
}

.phone-mockup:hover {
    transform: rotate(0deg) scale(1.05);
}

/* === SECTIONS === */
.section {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--clr-text);
}

.section-header p {
    font-size: 1.25rem;
    color: var(--clr-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* === FEATURE CARDS === */
.feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.feature-card {
    background: var(--clr-surface);
    border-radius: 20px;
    padding: 2rem;
    border: 1px solid var(--clr-surface-light);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--clr-primary), var(--clr-secondary), var(--clr-accent));
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    border-color: var(--clr-primary);
}

.feature-card.large {
    grid-column: 1 / -1;
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--clr-text);
}

.feature-description {
    color: var(--clr-text-muted);
    line-height: 1.6;
}

/* === GALLERY === */
.gallery-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.gallery-item {
    border-radius: 20px;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.gallery-item:hover {
    transform: scale(1.05);
}

.gallery-item img {
    width: 100%;
    height: auto;
    display: block;
}

/* === DOWNLOAD SECTION === */
.download-section {
    background: linear-gradient(135deg, var(--clr-surface), var(--clr-surface-light));
    border-radius: 30px;
    margin: 4rem 0;
}

/* === FOOTER === */
.footer {
    background: var(--clr-surface);
    padding: 3rem 2rem;
    text-align: center;
    border-top: 1px solid var(--clr-surface-light);
}

.footer p {
    color: var(--clr-text-muted);
    margin-bottom: 0.5rem;
}

/* === ANIMATIONS === */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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

/* === MOBILE MENU === */
@media (max-width: 767px) {
    .nav-links {
        display: none;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }
}