/* ============================================
   SOLAR ROI LIVE - MAIN STYLES
   Design System Profissional
   ============================================ */

/* CSS Variables */
:root {
    /* Colors */
    --color-primary: #FF8F00;
    --color-primary-light: #FFB800;
    --color-primary-dark: #FF6F00;
    --color-secondary: #0D6EFD;
    --color-success: #198754;
    --color-warning: #FFC107;
    --color-danger: #DC3545;
    
    /* Neutrals */
    --color-white: #FFFFFF;
    --color-gray-50: #F8F9FA;
    --color-gray-100: #F1F3F5;
    --color-gray-200: #E9ECEF;
    --color-gray-300: #DEE2E6;
    --color-gray-400: #CED4DA;
    --color-gray-500: #ADB5BD;
    --color-gray-600: #6C757D;
    --color-gray-700: #495057;
    --color-gray-800: #343A40;
    --color-gray-900: #212529;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* 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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background: var(--color-gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-200);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

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

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

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
}

.logo-live {
    color: var(--color-primary);
    font-weight: 800;
}

.nav {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-link {
    color: var(--color-gray-600);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary-light), var(--color-primary-dark));
    border-radius: var(--radius-full);
}

/* Hero Section */
.hero {
    position: relative;
    padding: var(--spacing-3xl) 0;
    overflow: hidden;
    background: linear-gradient(135deg, #FFF8E1 0%, #FFE0B2 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    line-height: 1.2;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-lg);
}

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

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.8;
}

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

.badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-700);
    box-shadow: var(--shadow-sm);
}

.badge svg {
    color: var(--color-primary);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.1;
    background-image: 
        radial-gradient(circle at 20% 50%, var(--color-primary-light) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, var(--color-primary-dark) 0%, transparent 50%);
}

/* Calculator Section */
.calculator-section {
    padding: var(--spacing-3xl) 0;
}

.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: var(--spacing-2xl);
}

.calculator-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-gray-200);
}

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

.card-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.card-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

/* Upload Section */
.upload-section {
    margin-bottom: var(--spacing-xl);
}

.upload-area {
    border: 2px dashed var(--color-gray-300);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
}

.upload-area:hover {
    border-color: var(--color-primary);
    background: var(--color-gray-50);
}

.upload-area svg {
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-md);
}

.upload-text {
    font-size: var(--font-size-base);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-sm);
}

.upload-link {
    color: var(--color-primary);
    font-weight: 600;
}

.upload-hint {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
}

.upload-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
}

/* Divider */
.divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: var(--spacing-xl) 0;
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--color-gray-300);
}

.divider span {
    padding: 0 var(--spacing-md);
}

/* Spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-gray-300);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 768px) {
    .calculator-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .nav {
        display: none;
    }
}