:root {
    /* Premium Color Palette */
    --primary: #d4a017; /* Metallic Gold/Construction Yellow */
    --primary-dark: #b8860b;
    --secondary: #0a192f; /* Deep Navy Charcoal */
    --accent: #f0f4f8;
    --text-main: #1a1a1a;
    --text-muted: #546e7a;
    --white: #ffffff;
    --bg: #ffffff;
    --card-bg: #ffffff;

    /* Elevation & Shadows */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
    --shadow-md: 0 8px 24px rgba(10, 25, 47, 0.08);
    --shadow-lg: 0 16px 48px rgba(10, 25, 47, 0.12);
    
    /* Spacing & Radius */
    --radius-sm: 4px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --space-unit: 1rem;

    /* Transitions */
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

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

body {
    font-family: 'Hind Siliguri', 'Inter', 'Outfit', sans-serif;
    line-height: 1.7;
    color: var(--text-main);
    background-color: var(--bg);
    -webkit-font-smoothing: antialiased;
}

.container {
    width: 92%;
    max-width: 1300px;
    margin: 0 auto;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2.5rem;
    border-radius: var(--radius-md);
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--secondary);
    color: var(--white);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: var(--primary);
    transition: var(--transition);
    z-index: -1;
}

.btn-primary:hover::before {
    width: 100%;
}

.btn-primary:hover {
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}