:root {
    --primary: #00d2ff;
    --primary-dark: #00a8cc;
    --secondary: #3a7bd5;
    --dark: #0b0e14;
    --bg-dark: #05070a;
    --text-main: #e0e6ed;
    --text-dim: #94a3b8;
    --glass: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

h1, h2, h3, .logo {
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

span {
    color: var(--primary);
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    background: rgba(5, 7, 10, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

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

.logo {
    font-size: 1.8rem;
    letter-spacing: -1px;
}

nav ul {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 2.5rem;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

nav ul li a:hover {
    color: var(--primary);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: url('river_apps_hero.png') center/cover no-repeat;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(11, 14, 20, 0.9) 0%, rgba(5, 7, 10, 0.4) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero h1 {
    font-size: 5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-dim);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
}

/* Buttons */
.btn-main, .btn-primary {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    box-shadow: 0 10px 30px rgba(0, 210, 255, 0.2);
}

.btn-main:hover, .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 210, 255, 0.4);
}

.btn-outline {
    display: inline-block;
    padding: 1rem 2.5rem;
    border: 1px solid var(--glass-border);
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    background: var(--glass);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: var(--glass-border);
    border-color: var(--primary);
}

/* Sections */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-header h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--text-dim);
    font-size: 1.1rem;
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--glass);
    padding: 3rem 2rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    text-align: center;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary);
}

.service-card .icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-dim);
}

/* Portfolio */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.portfolio-item {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    height: 450px;
    border: 1px solid var(--glass-border);
}

.portfolio-img {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: var(--transition);
}

.portfolio-info {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 2rem;
    background: linear-gradient(to top, rgba(5, 7, 10, 0.9), transparent);
    transform: translateY(20px);
    opacity: 0;
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-img {
    transform: scale(1.1);
}

.portfolio-item:hover .portfolio-info {
    transform: translateY(0);
    opacity: 1;
}

/* Marketing */
.marketing-flex {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.marketing-text {
    flex: 1;
}

.marketing-text h2 {
    font-size: 3.5rem;
    margin-bottom: 2rem;
}

.marketing-image {
    flex: 1;
    height: 500px;
    background: url('https://images.unsplash.com/photo-1551288049-bebda4e38f71?auto=format&fit=crop&w=800&q=80') center/cover;
    border-radius: 30px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.marketing-image .glass-card {
    background: rgba(5, 7, 10, 0.7);
    backdrop-filter: blur(20px);
    padding: 3rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    display: flex;
    gap: 3rem;
}

.stat {
    text-align: center;
}

.stat .num {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
}

.stat .lbl {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-dim);
}

.check-list {
    list-style: none;
    margin-top: 2rem;
}

.check-list li {
    margin-bottom: 1rem;
    position: relative;
    padding-left: 2rem;
}

.check-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 800;
}

/* Contact */
.contact-card {
    max-width: 800px;
    margin: 0 auto;
    background: var(--glass);
    padding: 4rem;
    border-radius: 40px;
    border: 1px solid var(--glass-border);
    text-align: center;
}

.contact-card h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.contact-card p {
    color: var(--text-dim);
    margin-bottom: 3rem;
}

#contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.input-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

input, textarea {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    padding: 1.2rem;
    border-radius: 12px;
    color: #fff;
    font-family: inherit;
    transition: var(--transition);
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.08);
}

textarea {
    height: 150px;
    resize: none;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeIn 1s forwards ease-out;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }

@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease-out;
}

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

.reveal-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.8s ease-out;
}

.reveal-left.active {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.8s ease-out;
}

.reveal-right.active {
    opacity: 1;
    transform: translateX(0);
}

/* Footer */
footer {
    padding: 50px 0;
    border-top: 1px solid var(--glass-border);
}

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

.footer-content p {
    color: var(--text-dim);
    font-size: 0.9rem;
}

.socials {
    display: flex;
    gap: 2rem;
}

.socials a {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.socials a:hover {
    color: var(--primary);
}

/* Responsive */
@media (max-width: 992px) {
    .hero h1 { font-size: 3.5rem; }
    .marketing-flex { flex-direction: column; }
    .input-group { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    nav { display: none; }
    .section-header h2 { font-size: 2.2rem; }
    .contact-card { padding: 2rem; }
}