/* ==========================================================================
   QUỐC PHONG HAIR SALON & HEAD SPA — CƠ SỞ 02
   DESIGN SYSTEM VARIABLES (TOKENS)
   Style: Luxury Editorial × Botanical Warmth × International Clarity
   ========================================================================== */

:root {
  /* --- BRAND PALETTE (6 Core Codes) --- */
  --color-obsidian: #111111;         /* ~35% - Primary Dark / Text / Contrast */
  --color-botanical-dark: #1B2F27;   /* ~25% - Deep Green Backdrop / Luxury Surfaces */
  --color-moss: #2B4335;             /* ~15% - Mid Botanical / Card Accents */
  --color-warm-brown: #3B2B22;       /* ~10% - Earthy Tone / Rich Borders */
  --color-champagne: #C6A36B;        /* ~5%  - Luxury Gold Accent (NOT OVERUSED) */
  --color-champagne-hover: #D8B780;  /* Lighter Gold for hover states */
  --color-champagne-muted: rgba(198, 163, 107, 0.18); /* Subtle Gold Glow/Tint */
  --color-warm-ivory: #F3EFE8;       /* ~10% - Primary Light Surface / Elegant Background */
  --color-warm-ivory-light: #FAF8F5; /* Ultra soft light background */
  
  /* --- FUNCTIONAL COLORS --- */
  --color-white: #FFFFFF;
  --color-black: #080808;
  --color-card-dark: #16241E;
  --color-card-bg-subtle: rgba(22, 36, 30, 0.7);
  --color-card-border: rgba(198, 163, 107, 0.22);
  --color-card-border-subtle: rgba(243, 239, 232, 0.12);
  --color-text-muted-dark: #A3B1AA;
  --color-text-muted-light: #6E6861;
  --color-error: #E55353;
  --color-error-bg: rgba(229, 83, 83, 0.1);
  --color-success: #4EAD75;
  --color-success-bg: rgba(78, 173, 117, 0.15);
  
  /* --- FLOATING CTA COLORS --- */
  --color-phone: #C6A36B;
  --color-whatsapp: #25D366;
  --color-zalo: #0068FF;
  --color-messenger: #0084FF;

  /* --- TYPOGRAPHY --- */
  --font-serif: 'Playfair Display', 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  
  /* Font Sizes */
  --text-xs: 0.75rem;     /* 12px */
  --text-sm: 0.875rem;    /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-md: 1.125rem;    /* 18px */
  --text-lg: 1.25rem;     /* 20px */
  --text-xl: 1.5rem;      /* 24px */
  --text-2xl: 1.875rem;   /* 30px */
  --text-3xl: 2.25rem;    /* 36px */
  --text-4xl: 3rem;       /* 48px */
  --text-5xl: 3.75rem;    /* 60px */
  
  /* Line Heights */
  --leading-tight: 1.15;
  --leading-snug: 1.3;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;
  
  /* --- SPACING SYSTEM --- */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  --space-32: 8rem;     /* 128px */
  
  /* --- CONTAINER & LAYOUT --- */
  --container-max-w: 1240px;
  --container-narrow: 860px;
  --container-padding: 1.5rem;
  
  /* --- BORDER RADIUS --- */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  
  /* --- SHADOWS & GLOWS --- */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.12);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.22);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.35);
  --shadow-gold-glow: 0 0 25px rgba(198, 163, 107, 0.25);
  
  /* --- TRANSITIONS --- */
  --transition-fast: 0.18s ease-in-out;
  --transition-base: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-smooth: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  
  /* --- Z-INDEX LAYERS --- */
  --z-base: 1;
  --z-card: 10;
  --z-sticky-bar: 200;
  --z-float-cta: 250;
  --z-header: 900;
  --z-drawer: 99999;
  --z-modal: 100000;
  --z-toast: 100001;
}