/* 
   Energy Trade International - Main Stylesheet
   Designed with premium dark elements, vibrant energy gold, and modern glassmorphism.
*/

@import url('https://fonts.googleapis.com/css2?family=Hind+Siliguri:wght@400;500;600;700&family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
    /* Active Theme Variables - default to Dark Theme values */
    --bg-color: #0D0F12;
    --surface-color: #171B22;
    --border-color: rgba(255, 255, 255, 0.07);
    --text-color: #F3F4F6;
    --text-color-muted: #9CA3AF;
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2);
    --header-bg: rgba(13, 15, 18, 0.85);
    --header-scrolled-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);

    /* Dynamic element variables */
    --heading-color: linear-gradient(135deg, #FFFFFF 0%, #D1D5DB 100%);
    --btn-secondary-text: #FFFFFF;
    --btn-secondary-border: rgba(255, 255, 255, 0.07);
    --btn-secondary-hover-bg: rgba(255, 255, 255, 0.05);
    --btn-secondary-hover-border: rgba(255, 255, 255, 0.2);
    
    --glass-card-bg: rgba(23, 27, 34, 0.65);
    --glass-card-border: rgba(255, 255, 255, 0.07);
    --glass-card-hover-border: rgba(253, 184, 19, 0.25);
    --glass-card-hover-shadow: 0 15px 35px -5px rgba(0, 0, 0, 0.5);
    
    --form-label-color: #9CA3AF;
    --form-input-bg: rgba(23, 27, 34, 0.8);
    --form-input-border: rgba(255, 255, 255, 0.07);
    --form-input-text: #FFFFFF;
    --form-option-bg: #171B22;
    
    --product-img-bg: radial-gradient(circle, rgba(23, 27, 34, 0.3) 0%, rgba(13, 15, 18, 0.8) 100%);
    --modal-overlay-bg: rgba(13, 15, 18, 0.85);

    /* Color Tokens */
    --primary: #FDB813; /* Energy Gold/Yellow */
    --primary-hover: #E5A30D;
    --primary-glow: rgba(253, 184, 19, 0.45);
    
    --dark-bg: #0D0F12; /* Rich dark background */
    --dark-surface: #171B22; /* Card and secondary element background */
    --dark-border: rgba(255, 255, 255, 0.07);
    --dark-text: #F3F4F6;
    --dark-text-muted: #9CA3AF;
    
    --light-bg: #F9FAFB;
    --light-surface: #FFFFFF;
    --light-border: #E5E7EB;
    --light-text: #111827;
    --light-text-muted: #6B7280;

    --success: #10B981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --error: #EF4444;
    --error-bg: rgba(239, 68, 68, 0.1);
    
    /* Layout Tokens */
    --font-sans: 'Outfit', 'Hind Siliguri', sans-serif;
    --max-width: 1280px;
    --border-radius-sm: 8px;
    --border-radius-md: 14px;
    --border-radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.3);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2);
    --glass-blur: blur(12px);
}

/* Light Theme class overrides */
body.light-theme {
    --bg-color: #F3F4F6;
    --surface-color: #FFFFFF;
    --border-color: #E5E7EB;
    --text-color: #1F2937;
    --text-color-muted: #4B5563;
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    --header-bg: rgba(255, 255, 255, 0.85);
    --header-scrolled-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);

    --heading-color: linear-gradient(135deg, #111827 0%, #374151 100%);
    --btn-secondary-text: #1F2937;
    --btn-secondary-border: #D1D5DB;
    --btn-secondary-hover-bg: rgba(0, 0, 0, 0.05);
    --btn-secondary-hover-border: #9CA3AF;
    
    --glass-card-bg: rgba(255, 255, 255, 0.75);
    --glass-card-border: #E5E7EB;
    --glass-card-hover-border: rgba(253, 184, 19, 0.45);
    --glass-card-hover-shadow: 0 15px 35px -5px rgba(0, 0, 0, 0.1);
    
    --form-label-color: #4B5563;
    --form-input-bg: #FFFFFF;
    --form-input-border: #D1D5DB;
    --form-input-text: #1F2937;
    --form-option-bg: #FFFFFF;
    
    --product-img-bg: radial-gradient(circle, rgba(255, 255, 255, 0.8) 0%, rgba(243, 244, 246, 0.8) 100%);
    --modal-overlay-bg: rgba(0, 0, 0, 0.55);
}

/* Global Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography Custom Styling */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.02em;
    color: var(--text-color);
}

p {
    color: var(--text-color-muted);
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #FFFFFF 0%, #D1D5DB 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-title p {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary) 0%, #FFA500 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Button Component Base */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-family: var(--font-sans);
}

.btn-primary {
    background-color: var(--primary);
    color: #0D0F12;
    box-shadow: 0 4px 14px 0 var(--primary-glow);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 var(--primary-glow);
}

.btn-secondary {
    background-color: transparent;
    color: var(--btn-secondary-text);
    border: 1px solid var(--btn-secondary-border);
}

.btn-secondary:hover {
    background-color: var(--btn-secondary-hover-bg);
    border-color: var(--btn-secondary-hover-border);
    transform: translateY(-2px);
}

/* Glass Card styling */
.glass-card {
    background: var(--glass-card-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-card-border);
    border-radius: var(--border-radius-md);
    padding: 30px;
    box-shadow: var(--glass-shadow);
    transition: var(--transition);
}

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

/* Flexbox and Grid helper classes */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .section { padding: 60px 0; }
    .section-title h2 { font-size: 2rem; }
}

/* Form Styling - Universal */
.form-group {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--form-label-color);
}

.form-control {
    background-color: var(--form-input-bg);
    border: 1px solid var(--form-input-border);
    color: var(--form-input-text);
    padding: 12px 16px;
    font-size: 1rem;
    border-radius: var(--border-radius-sm);
    outline: none;
    font-family: var(--font-sans);
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 10px 0 rgba(253, 184, 19, 0.15);
}

select.form-control option {
    background-color: var(--form-option-bg);
    color: var(--form-input-text);
}

/* Custom badges */
.badge {
    display: inline-flex;
    padding: 4px 12px;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 20px;
    text-transform: uppercase;
}

.badge-primary {
    background-color: rgba(253, 184, 19, 0.1);
    color: var(--primary);
    border: 1px solid rgba(253, 184, 19, 0.2);
}

.badge-success {
    background-color: var(--success-bg);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

/* Banner animations */
@keyframes pulseGlow {
    0% { box-shadow: 0 0 15px rgba(253, 184, 19, 0.2); }
    50% { box-shadow: 0 0 30px rgba(253, 184, 19, 0.4); }
    100% { box-shadow: 0 0 15px rgba(253, 184, 19, 0.2); }
}

.glow-effect {
    animation: pulseGlow 3s infinite ease-in-out;
}