/* ==========================================================================
   HANOI - BASE DESIGN SYSTEM & TOKENS (base.css)
   ========================================================================== */

/* Google Fonts Import: Outfit for modern, premium geometric geometric sans-serif */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800;900&display=swap');

:root {
    /* Color Palette - Premium Space & Wood Theme */
    --bg-deep: #0b090c;
    --bg-gradient: radial-gradient(circle at 50% 30%, #1c1520 0%, #0b090c 70%);
    --surface-glass: rgba(22, 17, 24, 0.7);
    --surface-glass-hover: rgba(35, 27, 38, 0.8);
    
    /* Brand Accents */
    --primary: #d4823b;        /* Warm Amber Wood */
    --primary-light: #e8a05c;  /* Highlight Wood */
    --primary-dark: #b86520;   /* Deep Cedar */
    --primary-glow: rgba(212, 130, 59, 0.35);
    
    --secondary: #6e4d35;      /* Mahogany */
    --secondary-glow: rgba(110, 77, 53, 0.2);
    
    /* UI States */
    --success: #2ec4b6;
    --success-glow: rgba(46, 196, 182, 0.2);
    --error: #e71d36;
    
    /* Text Colors */
    --text-primary: #f5f2f6;
    --text-muted: #9f97a3;
    --text-dim: #6d6571;
    
    /* Glassmorphic Borders & Shadows */
    --border-glass: rgba(255, 255, 255, 0.06);
    --border-glass-bright: rgba(255, 255, 255, 0.12);
    --shadow-premium: 0 20px 40px rgba(0, 0, 0, 0.5), 0 1px 0 rgba(255, 255, 255, 0.05) inset;
    --shadow-glow: 0 0 30px var(--primary-glow);
    
    /* Spacing Scale */
    --space-xs: 0.5rem;   /* 8px */
    --space-sm: 1rem;     /* 16px */
    --space-md: 1.5rem;   /* 24px */
    --space-lg: 2.5rem;   /* 40px */
    --space-xl: 4rem;     /* 64px */
    
    /* Layout Constants */
    --max-width: 1200px;
    --header-height: 80px;
    
    /* Border Radii */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-round: 9999px;
    
    /* Transitions */
    --transition-smooth: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-elastic: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Base Reset & Semantic Standard Elements */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg-deep);
    background-image: var(--bg-gradient);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Scrollbar Customization for Aesthetic Parity */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-deep);
}

::-webkit-scrollbar-thumb {
    background: var(--surface-glass);
    border: 2px solid var(--bg-deep);
    border-radius: var(--radius-round);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

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

p {
    font-weight: 400;
    color: var(--text-muted);
}

a {
    color: var(--primary-light);
    text-decoration: none;
    transition: var(--transition-smooth);
}

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

img, svg {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Basic Utilities */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-sm);
}

.text-center { text-align: center; }
.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }

.glow-text {
    text-shadow: 0 0 20px rgba(212, 130, 59, 0.3);
}