/* SunStream Solar Solutions - Main Stylesheet */

/* CSS Variables */
:root {
    /* Brand Colors */
    --primary-blue: #0A2A66;
    --secondary-blue: #123A8F;
    --solar-yellow: #F4B400;
    --light-solar-yellow: #FFD24D;
    --white: #FFFFFF;
    --light-grey: #F5F7FA;
    --text-light: #718096;
    --medium-grey: #E2E8F0;
    
    /* Typography */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Breakpoints */
    --breakpoint-sm: 576px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 992px;
    --breakpoint-xl: 1200px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #0A2A66, #123A8F);
    --gradient-hero: linear-gradient(135deg, rgba(10,42,102,0.65), rgba(18,58,143,0.75));
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: #4A5568;
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--primary-blue);
}

h1 {
    font-size: 3rem;
    font-weight: 700;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 2rem;
}

h4 {
    font-size: 1.5rem;
}

p {
    margin-bottom: var(--spacing-md);
    color: #4A5568;
}

a {
    color: var(--solar-yellow);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--light-solar-yellow);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 1rem;
    text-align: center;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background-color: var(--solar-yellow);
    color: var(--primary-blue);
    font-weight: 600;
}

.btn-primary:hover {
    background-color: var(--light-solar-yellow);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-outline {
    background-color: transparent;
    color: var(--solar-yellow);
    border: 2px solid var(--solar-yellow);
}

.btn-outline:hover {
    background-color: var(--solar-yellow);
    color: var(--primary-blue);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.1rem;
}

.btn-cta {
    background-color: var(--solar-yellow);
    color: var(--primary-blue);
    font-weight: 600;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.btn-cta:hover {
    background-color: var(--light-solar-yellow);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo {
    height: 45px;
    width: auto;
}

.brand-name {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
}

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

.nav-link {
    font-family: var(--font-heading);
    font-weight: 500;
    color: var(--primary-blue);
    transition: color 0.3s ease;
    position: relative;
    font-size: 0.95rem;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 3px;
    background-color: var(--solar-yellow);
    border-radius: var(--radius-sm);
}

.nav-cta {
    background-color: var(--solar-yellow);
    color: var(--primary-blue);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all 0.3s ease;
    font-family: var(--font-heading);
    font-size: 0.9rem;
}

.nav-cta:hover {
    background-color: var(--light-solar-yellow);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-blue);
    margin: 2px 0;
    transition: 0.3s;
    border-radius: var(--radius-sm);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Body scroll lock when nav is open */
body.nav-open {
    overflow: hidden;
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-hero);
}

.hero-content {
    position: relative;
    z-index: 1;
    color: var(--white);
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 1s ease;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
    animation: fadeInUp 1s ease 0.2s;
    animation-fill-mode: both;
    font-weight: 400;
    line-height: 1.4;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    animation: fadeInUp 1s ease 0.4s;
    animation-fill-mode: both;
    flex-wrap: wrap;
}

/* Page Header */
.page-header {
    padding: calc(80px + var(--spacing-xxl)) 0 var(--spacing-xl);
    background: var(--gradient-primary);
    color: var(--white);
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
    color: var(--white);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.section-header h2 {
    font-size: 3rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.section-header p {
    font-size: 1.2rem;
    color: #4A5568;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Grid Layouts */
.grid {
    display: grid;
    gap: var(--spacing-xl);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* Cards */
.card {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-xl);
    transition: all 0.3s ease;
    border: 1px solid rgba(226, 232, 240, 0.5);
    position: relative;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-lg);
    background-color: rgba(244, 180, 0, 0.1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.card:hover .card-icon {
    background-color: var(--solar-yellow);
    transform: scale(1.05);
}

.card-icon img {
    width: 45px;
    height: 45px;
    object-fit: contain;
    filter: brightness(0) saturate(100%) invert(54%) sepia(87%) saturate(765%) hue-rotate(354deg) brightness(101%) contrast(92%);
}

.card:hover .card-icon img {
    filter: brightness(0) saturate(100%) invert(10%) sepia(63%) saturate(6179%) hue-rotate(244deg) brightness(96%) contrast(101%);
}

.card h3 {
    font-size: 1.5rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.card p {
    color: #4A5568;
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Utility Classes */
.fade-in-up {
    animation: fadeInUp 0.8s ease forwards;
}

.fade-in {
    animation: fadeIn 0.8s ease forwards;
}

.slide-in-left {
    animation: slideInLeft 0.8s ease forwards;
}

.slide-in-right {
    animation: slideInRight 0.8s ease forwards;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: inherit;
}

.brand-link:hover {
    color: var(--solar-yellow);
}

.brand-link:hover .brand-name {
    color: var(--solar-yellow);
}
.text-muted {
    color: var(--text-light);
    opacity: 0.8;
}

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

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-0 {
    margin-bottom: 0;
}

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

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

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mb-xl {
    margin-bottom: var(--spacing-xl);
}

.mt-0 {
    margin-top: 0;
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mt-xl {
    margin-top: var(--spacing-xl);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .container {
        max-width: 960px;
    }
}

@media (max-width: 992px) {
    .container {
        max-width: 720px;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        max-width: 540px;
        padding: 0 var(--spacing-sm);
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-md);
        border-top: 1px solid var(--medium-grey);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grid-2 {
        grid-template-columns: 1fr;
    }
    
    .nav-menu .nav-link {
        padding: var(--spacing-md) 0;
        border-bottom: 1px solid var(--medium-grey);
    }
    
    .nav-menu .nav-cta {
        margin-top: var(--spacing-md);
        text-align: center;
    }
}

@media (max-width: 576px) {
    .container {
        max-width: 100%;
        padding: 0 var(--spacing-sm);
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    h3 {
        font-size: 1.5rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .page-header {
        padding: calc(70px + var(--spacing-lg)) 0 var(--spacing-md);
    }
    
    .page-header h1 {
        font-size: 1.75rem;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
    }
    
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
    }
    
    .btn-large {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 1rem;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .hero-buttons,
    .cta-section,
    .footer {
        display: none;
    }
    
    .page-header {
        background: none;
        color: var(--dark-grey);
        padding: var(--spacing-md) 0;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid var(--medium-grey);
    }
}