/* ============================================
   URBAN SHADE - LIQUID GLASS DESIGN SYSTEM
   ============================================ */

/* === ROOT VARIABLES === */
:root {
    /* Nature-inspired Color Palette */
    --green-start: #10B981;
    --green-end: #34D399;
    --blue-start: #0EA5E9;
    --blue-end: #06B6D4;
    --dark-bg: #0A1F1C;
    --darker-bg: #051412;
    
    /* Glass Morphism */
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.15);
    --glass-shadow: rgba(0, 0, 0, 0.2);
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Border Radius - ONLY TWO VALUES */
    --radius-soft: 24px;    /* rounded-2xl */
    --radius-full: 9999px;  /* rounded-full */
    
    /* Transitions */
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* === GLOBAL RESET === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--darker-bg) 100%);
    color: #ffffff;
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* === FLOATING BACKGROUND SHAPES === */
.bg-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: var(--radius-soft);
    opacity: 0.6;
    filter: blur(80px);
    animation: float 20s ease-in-out infinite;
}

.shape-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--green-start), var(--green-end));
    top: 10%;
    left: -10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--blue-start), var(--blue-end));
    top: 50%;
    right: -5%;
    animation-delay: 5s;
}

.shape-3 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--green-end), var(--blue-start));
    bottom: -10%;
    left: 20%;
    animation-delay: 10s;
}

.shape-4 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, var(--blue-end), var(--green-start));
    top: 30%;
    left: 50%;
    animation-delay: 15s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.1); }
    50% { transform: translate(-20px, 20px) scale(0.9); }
    75% { transform: translate(20px, 30px) scale(1.05); }
}

/* === GLASS CARD EFFECT === */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-soft);
    box-shadow: 0 8px 32px var(--glass-shadow);
    transition: all 0.4s var(--transition-smooth);
}

.glass-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.25);
}

/* === CONTAINER === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    position: relative;
    z-index: 1;
}

/* === NAVIGATION === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    background: rgba(10, 31, 28, 0.7);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: #ffffff;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 2rem;
}

.logo-text {
    background: linear-gradient(135deg, var(--green-start), var(--blue-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s var(--transition-smooth);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-soft);
}

.nav-links a:hover {
    color: var(--green-end);
    background: rgba(255, 255, 255, 0.05);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: #ffffff;
    border-radius: var(--radius-full);
    transition: all 0.3s var(--transition-smooth);
}

/* === BUTTONS === */
.btn-primary, .btn-secondary {
    padding: 0.875rem 2rem;
    border-radius: var(--radius-soft);
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s var(--transition-smooth);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--green-start), var(--green-end));
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.5);
}

.btn-secondary {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    color: #ffffff;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
    text-align: center;
}

/* === HERO SECTION === */
.hero {
    padding: calc(80px + var(--spacing-xl)) 0 var(--spacing-xl);
    text-align: center;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
}

.gradient-text {
    background: linear-gradient(135deg, var(--green-start), var(--blue-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
    max-width: 800px;
    margin: 0 auto;
}

.stat-item {
    padding: var(--spacing-md);
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--green-start), var(--blue-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
}

/* === SECTION HEADERS === */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 700px;
    margin: 0 auto;
}

/* === FEATURES SECTION === */
.features {
    padding: var(--spacing-xl) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    padding: var(--spacing-md);
    text-align: center;
}

.feature-icon {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-sm);
    display: inline-block;
    filter: drop-shadow(0 4px 8px rgba(16, 185, 129, 0.3));
}

.feature-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.feature-description {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}

/* === HOW IT WORKS SECTION === */
.how-it-works {
    padding: var(--spacing-xl) 0;
}

.steps-container {
    display: grid;
    gap: var(--spacing-md);
}

.step-item {
    padding: var(--spacing-md);
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-md);
    align-items: start;
}

.step-number {
    font-size: 4rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--green-start), var(--blue-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    opacity: 0.6;
}

.step-title {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.step-description {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

.step-features {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.75rem;
}

.step-features li {
    color: rgba(255, 255, 255, 0.7);
    padding-left: 1.5rem;
    position: relative;
}

.step-features li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--green-end);
    font-weight: bold;
}

/* === USE CASES SECTION === */
.use-cases {
    padding: var(--spacing-xl) 0;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.use-case-card {
    padding: var(--spacing-md);
}

.use-case-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    display: inline-block;
}

.use-case-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.use-case-description {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.use-case-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.metric-badge {
    padding: 0.5rem 1rem;
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--green-end);
    font-weight: 500;
}

/* === PRICING SECTION === */
.pricing {
    padding: var(--spacing-xl) 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    align-items: start;
}

.pricing-card {
    padding: var(--spacing-md);
    position: relative;
}

.pricing-featured {
    border: 2px solid var(--green-end);
    transform: scale(1.05);
}

.featured-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--green-start), var(--green-end));
    color: #ffffff;
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.pricing-header {
    text-align: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.pricing-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.25rem;
}

.price-amount {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--green-start), var(--blue-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.price-period {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.6);
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.pricing-features li {
    padding: 0.75rem 0;
    color: rgba(255, 255, 255, 0.85);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    line-height: 1.5;
}

.pricing-features li:last-child {
    border-bottom: none;
}

/* === CTA SECTION === */
.cta {
    padding: var(--spacing-xl) 0;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    text-align: center;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.cta-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-md);
}

.cta-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.form-input {
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-soft);
    color: #ffffff;
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: all 0.3s var(--transition-smooth);
}

.form-input:focus {
    outline: none;
    border-color: var(--green-end);
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.form-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-textarea {
    width: 100%;
    resize: vertical;
    min-height: 120px;
    margin-bottom: var(--spacing-sm);
}

select.form-input {
    cursor: pointer;
}

/* === FOOTER === */
.footer {
    padding: var(--spacing-lg) 0 var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.footer-heading {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--green-end);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s var(--transition-smooth);
}

.footer-links a:hover {
    color: var(--green-end);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.footer-legal {
    display: flex;
    gap: var(--spacing-md);
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color 0.3s var(--transition-smooth);
}

.footer-legal a:hover {
    color: var(--green-end);
}

/* === MODAL === */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s var(--transition-smooth);
}

.modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    max-width: 500px;
    padding: var(--spacing-lg);
    text-align: center;
    animation: modalSlideIn 0.4s var(--transition-smooth);
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--green-start), var(--green-end));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    margin: 0 auto var(--spacing-md);
    color: #ffffff;
}

.modal-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.modal-message {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

/* === ANIMATIONS === */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--transition-smooth), transform 0.8s var(--transition-smooth);
}

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

/* === RESPONSIVE DESIGN === */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10, 31, 28, 0.95);
        backdrop-filter: blur(20px) saturate(180%);
        -webkit-backdrop-filter: blur(20px) saturate(180%);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--glass-border);
        transform: translateY(-100%);
        opacity: 0;
        transition: all 0.3s var(--transition-smooth);
        pointer-events: none;
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .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-cta {
        flex-direction: column;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .step-item {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .step-number {
        font-size: 3rem;
    }
    
    .pricing-featured {
        transform: scale(1);
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .features-grid,
    .use-cases-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
    }
}