/* Main.css - Core styles for CarbonCore platform */

/* --- Variables --- */
:root {
    /* Colors */
    --primary-green: #4CAF50;
    --dark-green: #2E7D32;
    --light-green: #A5D6A7;
    --text-color: #333333;
    --text-light: #666666;
    --white: #FFFFFF;
    --black: #000000;
    --gray-light: #F5F5F5;
    --gray-medium: #E0E0E0;
    --gray-dark: #9E9E9E;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Font Sizes */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-xxl: 2rem;
    --font-size-xxxl: 3rem;
    
    /* Border Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    
    /* Box Shadow */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    
    /* Container Width */
    --container-max-width: 1200px;
}

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

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background: linear-gradient(to bottom, var(--light-green) 0%, var(--white) 500px);
    background-repeat: no-repeat;
    background-attachment: fixed;
    min-height: 100vh;
}

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

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

button {
    cursor: pointer;
    font-family: inherit;
}

/* --- Layout --- */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.hidden {
    display: none !important;
}

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

h1 {
    font-size: var(--font-size-xxxl);
}

h2 {
    font-size: var(--font-size-xxl);
}

h3 {
    font-size: var(--font-size-xl);
}

h4 {
    font-size: var(--font-size-lg);
}

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

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

.text-light {
    color: var(--text-light);
}

/* --- Header --- */
.header {
    padding: var(--spacing-md) 0;
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo img {
    height: 40px;
}

.main-nav ul {
    display: flex;
    gap: var(--spacing-lg);
}

.main-nav a {
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-green);
    transition: width 0.3s ease;
}

.main-nav a:hover::after {
    width: 100%;
}

.connect-wallet {
    display: flex;
    align-items: center;
}

.wallet-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.wallet-info span {
    font-size: var(--font-size-sm);
    font-weight: 500;
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.dashboard-link {
    background-color: var(--primary-green);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.dashboard-link:hover {
    background-color: var(--dark-green);
    color: var(--white);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    background: transparent;
    border: none;
}

.mobile-menu-toggle span {
    width: 100%;
    height: 3px;
    background-color: var(--dark-green);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 73px;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: var(--shadow-md);
    z-index: 99;
    padding: var(--spacing-md) 0;
    transform: translateY(-100%);
    transition: transform 0.3s ease;
}

.mobile-menu.active {
    transform: translateY(0);
}

.mobile-menu ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: 0 var(--spacing-lg);
}

.mobile-menu a {
    display: block;
    padding: var(--spacing-md) 0;
    font-weight: 500;
    border-bottom: 1px solid var(--gray-medium);
}

.mobile-connect-wallet {
    padding-top: var(--spacing-md);
}

/* --- Footer --- */
.footer {
    background-color: var(--gray-light);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: var(--spacing-xxl);
}

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

.footer-logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.footer-logo img {
    height: 40px;
}

.footer-logo p {
    font-weight: 600;
    font-size: var(--font-size-lg);
    margin-bottom: 0;
}

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

.footer-links-column h4 {
    margin-bottom: var(--spacing-md);
}

.footer-links-column ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-contact h4 {
    margin-bottom: var(--spacing-md);
}

.footer-bottom {
    border-top: 1px solid var(--gray-medium);
    padding-top: var(--spacing-md);
    text-align: center;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
}

.btn img {
    width: 20px;
    height: 20px;
}

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

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

.btn-secondary {
    background-color: var(--white);
    color: var(--primary-green);
    border: 1px solid var(--primary-green);
}

.btn-secondary:hover {
    background-color: var(--light-green);
}

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

/* --- Sections --- */
.section {
    padding: var(--spacing-xxl) 0;
}

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

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

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
}

/* --- Cards --- */
.card {
    background-color: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-lg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-md);
}

.card-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.card-content p:last-child {
    margin-bottom: 0;
}

/* --- Hero Section --- */
.hero {
    padding: var(--spacing-xxl) 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--spacing-xl);
}

.hero-content h1 {
    margin-bottom: var(--spacing-md);
}

.hero-content p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
}

.hero-image img {
    max-width: 100%;
}

/* --- Feature Cards --- */
.feature-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

/* --- Media Queries --- */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-image {
        order: 0;
        margin-bottom: var(--spacing-lg);
    }
    
    .feature-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-links {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .main-nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .connect-wallet {
        display: none;
    }
    
    .feature-cards {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    h1 {
        font-size: var(--font-size-xxl);
    }
    
    h2 {
        font-size: var(--font-size-xl);
    }
}