/* ═══════════════════════════════════════════
   SeoWeb.top - Design System Variables
   Emerald Growth | Modern Green Premium
   ═══════════════════════════════════════════ */

:root {
    /* ─── Primary Colors (Emerald Green) ─── */
    --primary-50: #ecfdf5;
    --primary-100: #d1fae5;
    --primary-200: #a7f3d0;
    --primary-300: #6ee7b7;
    --primary-400: #34d399;
    --primary-500: #10b981;
    --primary-600: #059669;
    --primary-700: #047857;
    --primary-800: #065f46;
    --primary-900: #064e3b;

    /* ─── Secondary (Teal) ─── */
    --secondary-50: #f0fdfa;
    --secondary-100: #ccfbf1;
    --secondary-200: #99f6e4;
    --secondary-300: #5eead4;
    --secondary-400: #2dd4bf;
    --secondary-500: #14b8a6;
    --secondary-600: #0d9488;
    --secondary-700: #0f766e;
    --secondary-800: #115e59;
    --secondary-900: #134e4a;

    /* ─── Accent (Lime/Yellow-Green) ─── */
    --accent-400: #a3e635;
    --accent-500: #84cc16;
    --accent-600: #65a30d;

    /* ─── Neutrals ─── */
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #022c22; /* Deep Forest Black */
    --gray-950: #011c16;

    /* ─── Semantic Colors ─── */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #0ea5e9;

    /* ─── Gradients ─── */
    --gradient-primary: linear-gradient(135deg, var(--primary-500) 0%, var(--secondary-600) 100%);
    --gradient-hero: linear-gradient(135deg, var(--primary-700) 0%, var(--secondary-800) 50%, var(--accent-600) 100%);
    --gradient-card: linear-gradient(145deg, rgba(16,185,129,0.08) 0%, rgba(13,148,136,0.05) 100%);
    --gradient-dark: linear-gradient(180deg, var(--gray-900) 0%, var(--gray-950) 100%);
    --gradient-text: linear-gradient(135deg, var(--primary-500) 0%, var(--secondary-500) 100%);

    /* ─── Typography ─── */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;

    --text-xs: 0.75rem;     /* 12px */
    --text-sm: 0.875rem;    /* 14px */
    --text-base: 1rem;      /* 16px */
    --text-lg: 1.125rem;    /* 18px */
    --text-xl: 1.25rem;     /* 20px */
    --text-2xl: 1.5rem;     /* 24px */
    --text-3xl: 1.875rem;   /* 30px */
    --text-4xl: 2.25rem;    /* 36px */
    --text-5xl: 3rem;       /* 48px */
    --text-6xl: 3.75rem;    /* 60px */

    --leading-tight: 1.25;
    --leading-normal: 1.6;
    --leading-relaxed: 1.75;

    /* ─── Spacing (4px grid) ─── */
    --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 */

    /* ─── Layout ─── */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1200px;
    --container-2xl: 1400px;

    /* ─── Border Radius ─── */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    /* ─── Shadows ─── */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -1px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 25px -3px rgba(0,0,0,0.08), 0 4px 10px -2px rgba(0,0,0,0.04);
    --shadow-xl: 0 20px 40px -5px rgba(0,0,0,0.1), 0 10px 20px -5px rgba(0,0,0,0.04);
    --shadow-glow: 0 0 40px rgba(16,185,129,0.3);
    --shadow-card: 0 4px 24px rgba(0,0,0,0.06);

    /* ─── Transitions ─── */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* ─── Z-Index ─── */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
    --z-toast: 800;
}