/* ================================
   CSS VARIABLES - SOLAR THEME
   ================================ */
:root {
    /* Solar-inspired color palette */
    --color-solar-yellow: #FDB022;
    --color-solar-orange: #FF8C42;
    --color-solar-deep: #FF6B35;
    --color-energy-blue: #004E89;
    --color-sky-blue: #1A759F;
    --color-light-blue: #76C8E8;
    --color-dark: #1A1A2E;
    --color-dark-gray: #16213E;
    --color-medium-gray: #0F3460;
    --color-light-gray: #E8F0F7;
    --color-white: #FFFFFF;
    --color-success: #00D9A3;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-solar-yellow) 0%, var(--color-solar-orange) 100%);
    --gradient-energy: linear-gradient(135deg, var(--color-energy-blue) 0%, var(--color-sky-blue) 100%);
    --gradient-hero: linear-gradient(135deg, #1A1A2E 0%, #16213E 50%, #0F3460 100%);
    
    /* Typography */
    --font-display: 'Syne', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Effects */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 30px rgba(253, 176, 34, 0.3);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ================================
   RESET & BASE STYLES
   ================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--color-dark);
    line-height: 1.6;
    overflow-x: hidden;
    background: var(--color-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ================================
   NAVIGATION
   ================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-dark);
}

.logo-icon {
    font-size: 2rem;
    filter: drop-shadow(0 0 10px rgba(253, 176, 34, 0.5));
}

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

.nav-links a {
    text-decoration: none;
    color: var(--color-dark);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-links a:not(.cta-btn)::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-base);
}

.nav-links a:not(.cta-btn):hover::after {
    width: 100%;
}

.cta-btn {
    background: var(--gradient-primary);
    color: white;
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

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

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-dark);
    transition: var(--transition-base);
}

/* ================================
   HERO SECTION
   ================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-hero);
    z-index: -2;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(253, 176, 34, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 78, 137, 0.1) 0%, transparent 50%);
    animation: pulseGlow 8s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    animation: fadeInUp 1s ease-out;
}

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

.badge {
    display: inline-block;
    background: rgba(253, 176, 34, 0.2);
    color: var(--color-solar-yellow);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    border: 1px solid rgba(253, 176, 34, 0.3);
}

.hero-title {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    color: white;
    margin-bottom: var(--spacing-sm);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

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

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-base);
    cursor: pointer;
    border: none;
    font-family: var(--font-body);
    font-size: 1rem;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: var(--color-dark);
}

.trust-indicators {
    display: flex;
    gap: var(--spacing-lg);
}

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

.trust-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.trust-label {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
}

/* Solar Panel Graphic */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.solar-panel-graphic {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    padding: 2rem;
    position: relative;
    animation: float 6s ease-in-out infinite;
}

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

.panel-cell {
    width: 150px;
    height: 150px;
    background: linear-gradient(135deg, rgba(0, 78, 137, 0.3) 0%, rgba(26, 117, 159, 0.3) 100%);
    border: 2px solid rgba(253, 176, 34, 0.5);
    border-radius: 10px;
    position: relative;
    overflow: hidden;
}

.panel-cell::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(253, 176, 34, 0.4), transparent);
    animation: shimmer 3s infinite;
    animation-delay: calc(var(--i) * 0.5s);
}

.panel-cell:nth-child(1) { --i: 0; }
.panel-cell:nth-child(2) { --i: 1; }
.panel-cell:nth-child(3) { --i: 2; }
.panel-cell:nth-child(4) { --i: 3; }
.panel-cell:nth-child(5) { --i: 4; }
.panel-cell:nth-child(6) { --i: 5; }

@keyframes shimmer {
    to { left: 100%; }
}

.energy-pulse {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(253, 176, 34, 0.6) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { 
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
    50% { 
        transform: translate(-50%, -50%) scale(1.5);
        opacity: 0.5;
    }
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 15px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: white;
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0%, 100% { 
        top: 8px;
        opacity: 1;
    }
    50% { 
        top: 20px;
        opacity: 0;
    }
}

/* ================================
   SECTION COMMON STYLES
   ================================ */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-tag {
    display: inline-block;
    color: var(--color-solar-orange);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* ================================
   SERVICES SECTION
   ================================ */
.services {
    background: var(--color-light-gray);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.service-card {
    background: white;
    padding: var(--spacing-md);
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-md);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.service-card h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-dark);
}

.service-card p {
    color: #666;
    margin-bottom: var(--spacing-sm);
}

.service-features {
    list-style: none;
}

.service-features li {
    padding: 0.5rem 0;
    color: #555;
    position: relative;
    padding-left: 1.5rem;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: bold;
}

/* ================================
   PRODUCTS SECTION
   ================================ */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.product-card {
    background: white;
    padding: var(--spacing-md);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    position: relative;
    border: 2px solid transparent;
    transition: var(--transition-base);
}

.product-card.featured {
    border-color: var(--color-solar-yellow);
    box-shadow: 0 8px 32px rgba(253, 176, 34, 0.2);
}

.product-card:hover {
    transform: translateY(-10px);
}

.product-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--gradient-primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.product-grade {
    display: inline-block;
    background: var(--gradient-energy);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 10px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.product-card h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.product-price {
    margin-bottom: var(--spacing-md);
}

.price-label {
    display: block;
    font-size: 0.875rem;
    color: #666;
}

.price {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-solar-orange);
}

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

.product-specs li {
    padding: 0.5rem 0;
    color: #555;
    border-bottom: 1px solid #eee;
}

.product-specs li:last-child {
    border-bottom: none;
}

/* ================================
   SUBSIDY SECTION
   ================================ */
.subsidy {
    background: var(--gradient-hero);
    color: white;
}

.subsidy-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.subsidy-description {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.subsidy-table {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    backdrop-filter: blur(10px);
}

.subsidy-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.subsidy-row:last-child {
    border-bottom: none;
}

.subsidy-row.featured {
    background: rgba(253, 176, 34, 0.2);
    border-radius: 10px;
    border: 1px solid rgba(253, 176, 34, 0.3);
}

.subsidy-capacity {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
}

.subsidy-amount {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-solar-yellow);
}

.subsidy-note {
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-sm);
    border-radius: 10px;
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
}

.subsidy-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.subsidy-graphic {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: 30px;
    text-align: center;
    border: 2px solid rgba(253, 176, 34, 0.3);
}

.rupee-symbol {
    font-size: 4rem;
    font-weight: 800;
    color: var(--color-solar-yellow);
    margin-bottom: var(--spacing-sm);
}

.amount-display {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    color: white;
    margin-bottom: var(--spacing-sm);
}

.subsidy-label {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.125rem;
}

/* ================================
   CALCULATOR SECTION
   ================================ */
.calculator {
    background: var(--color-light-gray);
}

.calculator-wrapper {
    background: white;
    border-radius: 30px;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.calculator-inputs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

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

.input-group label {
    font-weight: 600;
    color: var(--color-dark);
}

.input-group input,
.input-group select {
    padding: 0.75rem;
    border: 2px solid #ddd;
    border-radius: 10px;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--color-solar-yellow);
}

.calculator-inputs .btn {
    grid-column: span 3;
    width: 100%;
    margin-top: var(--spacing-sm);
}

.calculator-results {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.result-card {
    background: var(--color-light-gray);
    padding: var(--spacing-md);
    border-radius: 15px;
    text-align: center;
}

.result-card.highlight {
    background: var(--gradient-primary);
    color: white;
}

.result-label {
    font-size: 0.875rem;
    color: #666;
    margin-bottom: 0.5rem;
}

.result-card.highlight .result-label {
    color: rgba(255, 255, 255, 0.9);
}

.result-value {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--color-dark);
}

.result-card.highlight .result-value {
    color: white;
}

/* ================================
   ABOUT SECTION
   ================================ */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.about-text p {
    color: #666;
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.feature-item {
    display: flex;
    gap: var(--spacing-sm);
}

.feature-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
}

.feature-item strong {
    display: block;
    color: var(--color-dark);
    margin-bottom: 0.25rem;
}

.feature-item p {
    color: #666;
    margin: 0;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.stat-card {
    background: var(--gradient-hero);
    color: white;
    padding: var(--spacing-md);
    border-radius: 20px;
    text-align: center;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-solar-yellow);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: rgba(255, 255, 255, 0.8);
}

/* ================================
   SERVICE AREAS
   ================================ */
.service-areas {
    background: var(--color-light-gray);
    padding: var(--spacing-md) 0;
    text-align: center;
}

.service-areas h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.areas-list {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.area-tag {
    background: white;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    color: var(--color-dark);
    box-shadow: var(--shadow-sm);
}

/* ================================
   CONTACT SECTION
   ================================ */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.contact-item {
    display: flex;
    gap: var(--spacing-sm);
    align-items: start;
}

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

.contact-label {
    font-size: 0.875rem;
    color: #666;
    margin-bottom: 0.25rem;
}

.contact-item a {
    color: var(--color-energy-blue);
    text-decoration: none;
    font-weight: 600;
}

.contact-item code {
    background: var(--color-light-gray);
    padding: 0.25rem 0.5rem;
    border-radius: 5px;
    font-family: monospace;
}

.contact-form {
    background: var(--color-light-gray);
    padding: var(--spacing-md);
    border-radius: 20px;
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #ddd;
    border-radius: 10px;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-solar-yellow);
}

.contact-form .btn {
    width: 100%;
}

/* ================================
   FOOTER
   ================================ */
.footer {
    background: var(--gradient-hero);
    color: white;
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.footer-about p {
    color: rgba(255, 255, 255, 0.7);
    margin-top: var(--spacing-sm);
}

.footer-links h4 {
    font-family: var(--font-display);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

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

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

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

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

.footer-contact p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

/* ================================
   RESPONSIVE DESIGN
   ================================ */
@media (max-width: 1024px) {
    .hero-content,
    .services-grid,
    .products-grid,
    .subsidy-content,
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .calculator-inputs {
        grid-template-columns: 1fr;
    }
    
    .calculator-inputs .btn {
        grid-column: 1;
    }
    
    .calculator-results {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        opacity: 0;
        transition: var(--transition-base);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .trust-indicators {
        gap: var(--spacing-md);
    }
    
    .calculator-results,
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-cta .btn {
        width: 100%;
        text-align: center;
    }
}