/* ===== MAIN STYLES ===== */

/* CSS variables for easy editing of colors and sizes */
:root {
    /* Light theme colors (default) */
    --primary-blue: #1e3a8a;
    --tech-green: #10b981;
    --electric-blue: #3b82f6;
    --silver: #e5e7eb;
    --light-bg: #f8fafc;
    --white: #ffffff;
    --dark-text: #1f2937;
    --gray-text: #6b7280;
    --light-gray: #f3f4f6;
    
    /* Gradients */
    --primary-gradient: linear-gradient(135deg, var(--primary-blue) 0%, var(--electric-blue) 100%);
    --hero-gradient: linear-gradient(135deg, var(--primary-blue) 0%, var(--tech-green) 100%);
    
    /* Sizes */
    --container-max-width: 1200px;
    --border-radius: 12px;
    --border-radius-small: 8px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Fonts */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Light theme variables (explicit) */
[data-theme="light"] {
    --white: #ffffff;
    --light-bg: #f8fafc;
    --dark-text: #1f2937;
    --gray-text: #6b7280;
    --silver: #e5e7eb;
    --light-gray: #f3f4f6;
    
    /* Light theme shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Dark theme variables */
[data-theme="dark"] {
    --white: #1f2937;
    --light-bg: #111827;
    --dark-text: #f9fafb;
    --gray-text: #d1d5db;
    --silver: #374151;
    --light-gray: #374151;
    
    /* Dark theme shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

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

/* Base styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--dark-text);
    background-color: var(--white);
    transition: color 0.3s ease, background-color 0.3s ease;
}

/* ===== UTILITIES ===== */

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

.section-title {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--dark-text);
    transition: color 0.3s ease;
}

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

/* ===== BUTTONS ===== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.btn-primary {
    background: transparent;
    color: #ffffff;
    border: 2px solid #ffffff;
}

.btn-primary:hover {
    background: #ffffff;
    color: var(--primary-blue);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--primary-gradient);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

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

/* ===== HEADER ===== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--silver);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

[data-theme="dark"] .header {
    background: rgba(31, 41, 55, 0.95);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo-img {
    width: 32px;
    height: 32px;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-blue);
}

/* Theme Toggle Button */
.theme-toggle {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 2px solid transparent;
    border-radius: 50%;
    background: var(--light-bg);
    color: var(--dark-text);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.theme-toggle:hover {
    background: var(--silver);
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.theme-toggle:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-toggle .sun-icon,
.theme-toggle .moon-icon {
    position: absolute;
    transition: all 0.3s ease;
}

/* Light mode - show sun, hide moon */
.theme-toggle .sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.theme-toggle .moon-icon {
    opacity: 0;
    transform: rotate(90deg) scale(0.5);
}

/* Dark mode - show moon, hide sun */
[data-theme="dark"] .theme-toggle .sun-icon {
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}

[data-theme="dark"] .theme-toggle .moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

/* ===== HERO SECTION ===== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--light-bg);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 1;
}

/* Overlay for better text readability */
.hero-background::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.7) 0%, rgba(16, 185, 129, 0.6) 100%);
    z-index: 1;
}

[data-theme="dark"] .hero-background::after {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.8) 0%, rgba(16, 185, 129, 0.7) 100%);
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(30, 58, 138, 0.1) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding-top: var(--spacing-xxl);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--white);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xl);
    font-weight: var(--font-weight-normal);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== VALUE PROPOSITION SECTION ===== */

.value-proposition {
    padding: var(--spacing-xxl) 0;
    background: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    background: var(--white);
    border: 1px solid var(--silver);
    transition: all 0.3s ease, background-color 0.3s ease, border-color 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

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

.feature-card:hover::before {
    transform: translateX(0);
}

/* Dark theme feature cards */
[data-theme="dark"] .feature-card {
    background: #374151;
    border-color: #4b5563;
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-md);
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-blue), var(--electric-blue));
    color: var(--white);
    position: relative;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    color: var(--dark-text);
    transition: color 0.3s ease;
}

.feature-description {
    color: var(--gray-text);
    line-height: 1.6;
    transition: color 0.3s ease;
}

/* ===== COMING SOON SECTION ===== */

.coming-soon {
    padding: var(--spacing-xxl) 0;
    background: var(--light-bg);
    position: relative;
}

.coming-soon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 30% 20%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(16, 185, 129, 0.05) 0%, transparent 50%);
}

.coming-soon-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.coming-soon-text {
    font-size: 1.125rem;
    color: var(--gray-text);
    margin-bottom: var(--spacing-xl);
    transition: color 0.3s ease;
}

/* ===== SUBSCRIPTION FORM ===== */

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

.form-group {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 400px;
    margin: 0 auto;
    margin-bottom: var(--spacing-sm);
}

.form-input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--silver);
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: all 0.3s ease, background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--electric-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Dark theme form styles */
[data-theme="dark"] .form-input {
    background: #374151;
    border-color: #4b5563;
    color: var(--dark-text);
}

[data-theme="dark"] .form-input::placeholder {
    color: var(--gray-text);
}

.form-message {
    min-height: 1.5rem;
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
}

.form-message.success {
    color: var(--tech-green);
}

.form-message.error {
    color: #ef4444;
}

/* ===== SOCIAL LINKS ===== */

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

.social-links p {
    margin-bottom: var(--spacing-sm);
    color: var(--gray-text);
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--white);
    color: var(--gray-text);
    text-decoration: none;
    transition: all 0.3s ease, background-color 0.3s ease, border-color 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.social-link:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Dark theme social links */
[data-theme="dark"] .social-link {
    background: #374151;
    border: 1px solid #4b5563;
}

/* ===== FOOTER ===== */

.footer {
    background: var(--dark-text);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--spacing-lg);
}

.footer-left .logo-text {
    color: var(--white);
}

.footer-description {
    margin-top: var(--spacing-sm);
    color: var(--silver);
    max-width: 300px;
}

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

.footer-links a {
    color: var(--silver);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid #374151;
    color: var(--silver);
    font-size: 0.875rem;
}

/* ===== ANIMATIONS ===== */

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* Classes for animations */
.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fade-in-left {
    animation: fadeInLeft 0.6s ease-out;
}

.animate-fade-in-right {
    animation: fadeInRight 0.6s ease-out;
}

/* ===== LOADING STATES ===== */

.loading {
    pointer-events: none;
    opacity: 0.7;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    transform: translate(-50%, -50%);
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}