:root {
    /* Brand Colors */
    --primary-blue: #005387;
    --primary-green: #52A33F;
    --dark-bg: #0a0f1a;
    --darker-bg: #050810;
    --light-text: #ffffff;
    --gray-text: #a0aec0;
    --card-bg: #1a202c;
    
    /* Spacing */
    --section-padding: 100px;
    --container-width: 1200px;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

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

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 1rem;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1rem;
}

h3 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
    margin-bottom: 0.75rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    background: #6bc04e;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(82, 163, 63, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--light-text);
    border: 2px solid var(--primary-blue);
}

.btn-secondary:hover {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 83, 135, 0.3);
}

.btn-large {
    padding: 18px 36px;
    font-size: 18px;
}

.badge {
    background: var(--primary-green);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--section-padding) 0;
    background: linear-gradient(135deg, var(--darker-bg) 0%, var(--dark-bg) 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(82, 163, 63, 0.15) 0%, transparent 70%);
    top: -200px;
    right: -200px;
    border-radius: 50%;
    animation: pulse 8s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 83, 135, 0.15) 0%, transparent 70%);
    bottom: -150px;
    left: -150px;
    border-radius: 50%;
    animation: pulse 6s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-logo {
    max-width: 200px;
    margin-bottom: 30px;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    color: var(--gray-text);
    margin-bottom: 40px;
    max-width: 500px;
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

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

.phone-frame {
    position: relative;
    width: 320px;
    border-radius: 40px;
    overflow: hidden;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
    border: 8px solid #1a1a1a;
    background: #000;
}

.app-screenshot {
    width: 100%;
    height: auto;
    display: block;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 24px;
    color: var(--primary-green);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(10px);
    }
}

/* Animations */
.fade-in {
    animation: fadeIn 1s ease-out;
}

.fade-in-up {
    animation: fadeInUp 1s ease-out;
}

.fade-in-up.delay-1 {
    animation-delay: 0.2s;
    opacity: 0;
    animation-fill-mode: forwards;
}

.fade-in-up.delay-2 {
    animation-delay: 0.4s;
    opacity: 0;
    animation-fill-mode: forwards;
}

.fade-in-up.delay-3 {
    animation-delay: 0.6s;
    opacity: 0;
    animation-fill-mode: forwards;
}

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

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

/* Section Styles */
section {
    padding: var(--section-padding) 0;
}

.section-title {
    text-align: center;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--light-text) 0%, var(--primary-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    color: var(--gray-text);
    font-size: 1.25rem;
    margin-bottom: 60px;
}

/* How It Works Section */
.how-it-works {
    background: var(--darker-bg);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    margin-bottom: 80px;
}

.step {
    text-align: center;
    padding: 40px 30px;
    background: var(--card-bg);
    border-radius: 20px;
    transition: var(--transition);
    position: relative;
    border: 2px solid transparent;
}

.step:hover {
    transform: translateY(-10px);
    border-color: var(--primary-green);
    box-shadow: 0 20px 40px rgba(82, 163, 63, 0.2);
}

.step-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-green) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
}

.step-number {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 48px;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.05);
}

.step h3 {
    color: var(--light-text);
    margin-bottom: 15px;
}

.step p {
    color: var(--gray-text);
    line-height: 1.6;
}

.demo-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    background: var(--card-bg);
    padding: 60px;
    border-radius: 30px;
    border: 2px solid rgba(82, 163, 63, 0.2);
}

.demo-phone {
    position: relative;
}

.demo-screenshot {
    width: 100%;
    max-width: 300px;
    border-radius: 30px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    border: 6px solid #1a1a1a;
}

.demo-text h3 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.demo-text p {
    font-size: 1.125rem;
    color: var(--gray-text);
    line-height: 1.8;
}

/* Social Section */
.social-section {
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary-blue) 100%);
    position: relative;
    overflow: hidden;
}

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

.social-text h2 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.lead {
    font-size: 1.5rem;
    color: var(--gray-text);
    margin-bottom: 40px;
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.feature-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.feature-item i {
    font-size: 32px;
    color: var(--primary-green);
    min-width: 40px;
}

.feature-item h4 {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

.feature-item p {
    color: var(--gray-text);
}

.social-visual {
    position: relative;
    height: 400px;
}

.floating-card {
    position: absolute;
    background: var(--card-bg);
    padding: 20px 30px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border: 2px solid var(--primary-green);
    animation: float 3s ease-in-out infinite;
}

.floating-card i {
    font-size: 28px;
    color: var(--primary-green);
}

.card-1 {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 50%;
    right: 10%;
    animation-delay: 1s;
}

.card-3 {
    bottom: 15%;
    left: 20%;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Why DeciD Section */
.why-decid {
    background: var(--darker-bg);
}

.benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 30px;
}

.benefit {
    text-align: center;
    padding: 40px 20px;
    background: var(--card-bg);
    border-radius: 20px;
    transition: var(--transition);
    border: 2px solid transparent;
}

.benefit:hover {
    transform: translateY(-10px);
    border-color: var(--primary-green);
    box-shadow: 0 20px 40px rgba(82, 163, 63, 0.2);
}

.benefit-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-green) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
}

.benefit h3 {
    margin-bottom: 15px;
}

.benefit p {
    color: var(--gray-text);
}

/* Final CTA Section */
.final-cta {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-green) 100%);
    text-align: center;
    position: relative;
}

.cta-content h2 {
    font-size: 3.5rem;
    margin-bottom: 20px;
}

.cta-content p {
    font-size: 1.5rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.cta-content .cta-buttons {
    justify-content: center;
    margin-bottom: 60px;
}

.app-preview {
    margin-top: 40px;
}

.logo-alt {
    max-width: 300px;
    filter: brightness(0) invert(1);
    opacity: 0.7;
}

/* Footer */
.footer {
    background: var(--darker-bg);
    padding: 60px 0 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo {
    max-width: 150px;
    margin-bottom: 15px;
}

.footer-tagline {
    color: var(--gray-text);
}

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

.footer-column h4 {
    margin-bottom: 20px;
    color: var(--primary-green);
    font-size: 1rem;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 12px;
}

.footer-column a {
    color: var(--gray-text);
    text-decoration: none;
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--primary-green);
}

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

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--card-bg);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-green);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--gray-text);
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 1024px) {
    :root {
        --section-padding: 70px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-mockup {
        order: -1;
    }
    
    .cta-buttons {
        justify-content: center;
    }
    
    .demo-section {
        grid-template-columns: 1fr;
        padding: 40px;
    }
    
    .demo-phone {
        text-align: center;
    }
    
    .social-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .social-visual {
        height: 300px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 50px;
    }
    
    .hero-logo {
        max-width: 150px;
    }
    
    .phone-frame {
        width: 280px;
    }
    
    .steps {
        grid-template-columns: 1fr;
    }
    
    .demo-section {
        padding: 30px 20px;
    }
    
    .benefits {
        grid-template-columns: 1fr;
    }
    
    .social-visual {
        height: 250px;
    }
    
    .floating-card {
        font-size: 14px;
        padding: 15px 20px;
    }
    
    .floating-card i {
        font-size: 20px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .cta-content h2 {
        font-size: 2.5rem;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-subtitle {
        max-width: 100%;
    }
    
    .phone-frame {
        width: 240px;
    }
    
    .demo-screenshot {
        max-width: 240px;
    }
    
    .social-text h2 {
        font-size: 2rem;
    }
    
    .lead {
        font-size: 1.125rem;
    }
}