/* ==========================================
   EnerPredict AI - Liquid Glass Design System
   ========================================== */

:root {
    /* Color Palette - Energy Theme */
    --primary: #06b6d4;
    --primary-dark: #0891b2;
    --secondary: #10b981;
    --accent: #8b5cf6;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --dark-lighter: #334155;
    --light: #f1f5f9;
    --light-dark: #e2e8f0;
    
    /* Glass Effects */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    color: var(--light);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ==========================================
   Navigation
   ========================================== */

.nav-glass {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    transition: all 0.3s var(--transition-smooth);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    width: 2.5rem;
    height: 2.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

.logo-ai {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-left: 0.25rem;
}

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

.nav-link {
    color: var(--light-dark);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s var(--transition-smooth);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 0.3s var(--transition-smooth);
    border-radius: var(--radius-full);
}

.nav-link:hover, .nav-link.active {
    color: var(--primary);
}

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

.cta-button {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: none;
    border-radius: var(--radius-xl);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s var(--transition-smooth);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.4);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 0.25rem;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 1.5rem;
    height: 2px;
    background: var(--light);
    border-radius: var(--radius-full);
    transition: all 0.3s var(--transition-smooth);
}

/* ==========================================
   Hero Section
   ========================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 2rem 2rem;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.gradient-orb {
    position: absolute;
    border-radius: var(--radius-full);
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--primary), transparent);
    top: -10%;
    left: -5%;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--secondary), transparent);
    top: 40%;
    right: -5%;
    animation-delay: 7s;
}

.orb-3 {
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, var(--accent), transparent);
    bottom: -10%;
    left: 30%;
    animation-delay: 14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

.hero-content {
    max-width: 1400px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.badge-icon {
    font-size: 1.25rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--light-dark);
    margin-bottom: 2rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.primary-button {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: none;
    border-radius: var(--radius-xl);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s var(--transition-smooth);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

.primary-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(6, 182, 212, 0.4);
}

.secondary-button {
    padding: 1rem 2rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    color: white;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s var(--transition-smooth);
}

.secondary-button:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.button-icon {
    font-size: 1.25rem;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--light-dark);
    margin-top: 0.25rem;
}

.stat-divider {
    width: 1px;
    height: 3rem;
    background: var(--glass-border);
}

.hero-visual {
    position: relative;
}

.dashboard-preview {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    box-shadow: var(--glass-shadow);
    transition: all 0.3s var(--transition-smooth);
}

.dashboard-preview:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.5);
}

.dashboard-header {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.dashboard-dot {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
    background: var(--glass-border);
}

.chart-container {
    width: 100%;
    height: 250px;
}

.energy-chart {
    width: 100%;
    height: 100%;
}

.chart-line {
    fill: none;
    stroke: var(--primary);
    stroke-width: 3;
    stroke-linecap: round;
    animation: drawLine 2s ease-in-out forwards;
}

@keyframes drawLine {
    from { stroke-dasharray: 1000; stroke-dashoffset: 1000; }
    to { stroke-dasharray: 1000; stroke-dashoffset: 0; }
}

/* ==========================================
   Features Section
   ========================================== */

.features {
    padding: 6rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

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

.section-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--light-dark);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    transition: all 0.3s var(--transition-smooth);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
    border-color: rgba(6, 182, 212, 0.3);
    background: rgba(255, 255, 255, 0.08);
}

.feature-icon {
    width: 4rem;
    height: 4rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

.feature-icon svg {
    width: 2rem;
    height: 2rem;
    color: white;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.feature-description {
    color: var(--light-dark);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.feature-list li {
    padding-left: 1.5rem;
    position: relative;
    color: var(--light-dark);
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: 700;
}

/* ==========================================
   Solutions Section
   ========================================== */

.solutions {
    padding: 6rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.solution-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    transition: all 0.3s var(--transition-smooth);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.solution-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
    border-color: rgba(6, 182, 212, 0.3);
}

.solution-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.solution-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.solution-description {
    color: var(--light-dark);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.solution-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s var(--transition-smooth);
    display: inline-block;
}

.solution-link:hover {
    transform: translateX(5px);
    color: var(--secondary);
}

/* ==========================================
   About Section
   ========================================== */

.about {
    padding: 6rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-description {
    color: var(--light-dark);
    margin-bottom: 1.5rem;
    line-height: 1.8;
    font-size: 1.125rem;
}

.about-values {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.value-item {
    display: flex;
    gap: 1rem;
    align-items: start;
}

.value-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.value-content h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.value-content p {
    color: var(--light-dark);
}

.stats-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.stat-box {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-align: center;
    transition: all 0.3s var(--transition-smooth);
}

.stat-box:hover {
    transform: translateY(-5px);
    border-color: rgba(6, 182, 212, 0.3);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-title {
    color: var(--light-dark);
    font-size: 0.875rem;
    font-weight: 600;
}

/* ==========================================
   Contact Section
   ========================================== */

.contact {
    padding: 6rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-description {
    color: var(--light-dark);
    margin-bottom: 2rem;
    line-height: 1.8;
    font-size: 1.125rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    gap: 1rem;
    align-items: start;
}

.contact-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-text h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.contact-text a, .contact-text p {
    color: var(--light-dark);
    text-decoration: none;
    transition: color 0.3s var(--transition-smooth);
}

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

.contact-form-container {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 2rem;
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--light-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.875rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    color: var(--light);
    font-size: 1rem;
    transition: all 0.3s var(--transition-smooth);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.submit-button {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: none;
    border-radius: var(--radius-xl);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s var(--transition-smooth);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

.submit-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(6, 182, 212, 0.4);
}

/* ==========================================
   Footer
   ========================================== */

.footer {
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    padding: 4rem 2rem 2rem;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-description {
    color: var(--light-dark);
    margin: 1rem 0 1.5rem;
    max-width: 300px;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 2.5rem;
    height: 2.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--light-dark);
    text-decoration: none;
    transition: all 0.3s var(--transition-smooth);
}

.social-link:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--light-dark);
    text-decoration: none;
    transition: color 0.3s var(--transition-smooth);
}

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

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--light-dark);
    font-size: 0.875rem;
}

/* ==========================================
   Responsive Design
   ========================================== */

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-visual {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .about-content, .contact-container {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .cta-button {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid, .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}