/* ═══════════════════════════════════════════════════════════
   GITANA DESIGN SYSTEM — CSS Variables
   
   Brand Colors derived from Logo (Teal + Blue)
   Philosophy: Human, Minimal, Clear, Accessible, Intelligent, Trustworthy
   Principle: Simple outside. Intelligent inside.
   ═══════════════════════════════════════════════════════════ */

:root {
    /* ─── Primary Colors (from Logo) ─── */
    --color-primary-teal: #3BBFA0;
    --color-primary-blue: #1A73E8;
    --color-primary-teal-light: #5DD4B7;
    --color-primary-teal-dark: #2A9B80;
    --color-primary-blue-light: #4A93F0;
    --color-primary-blue-dark: #1557B0;

    /* ─── Brand Gradient ─── */
    --gradient-brand: linear-gradient(135deg, var(--color-primary-teal) 0%, var(--color-primary-blue) 100%);
    --gradient-brand-reverse: linear-gradient(135deg, var(--color-primary-blue) 0%, var(--color-primary-teal) 100%);
    --gradient-brand-subtle: linear-gradient(135deg, rgba(59, 191, 160, 0.08) 0%, rgba(26, 115, 232, 0.08) 100%);
    --gradient-brand-glow: linear-gradient(135deg, rgba(59, 191, 160, 0.15) 0%, rgba(26, 115, 232, 0.15) 100%);

    /* ─── Luminous Deep Slate Theme (Default) ─── */
    --color-bg-primary: #0B1120;
    --color-bg-secondary: #0F172A;
    --color-bg-tertiary: #1E293B;
    --color-bg-card: rgba(30, 41, 59, 0.7);
    --color-bg-card-hover: rgba(51, 65, 85, 0.8);
    --color-bg-elevated: #1E293B;
    --color-bg-glass: rgba(15, 23, 42, 0.75);
    --color-bg-glass-light: rgba(30, 41, 59, 0.45);

    /* ─── Surfaces ─── */
    --color-surface-1: #1E293B;
    --color-surface-2: #334155;
    --color-surface-3: #475569;
    --color-border: rgba(148, 163, 184, 0.14);
    --color-border-light: rgba(148, 163, 184, 0.22);
    --color-border-focus: var(--color-primary-teal);

    /* ─── Text Colors ─── */
    --color-text-primary: #F8FAFC;
    --color-text-secondary: #94A3B8;
    --color-text-tertiary: #64748B;
    --color-text-inverse: #0B1120;
    --color-text-accent: var(--color-primary-teal);
    --color-text-link: var(--color-primary-teal-light);
    --color-text-link-hover: var(--color-primary-teal);

    /* ─── Status Colors ─── */
    --color-success: #34D399;
    --color-success-bg: rgba(52, 211, 153, 0.1);
    --color-warning: #FBBF24;
    --color-warning-bg: rgba(251, 191, 36, 0.1);
    --color-error: #F87171;
    --color-error-bg: rgba(248, 113, 113, 0.1);
    --color-info: var(--color-primary-blue-light);
    --color-info-bg: rgba(74, 147, 240, 0.1);
}

/* ─── Luminous Pearl Light Theme ─── */
[data-theme="light"] {
    --color-bg-primary: #F8FAFC;
    --color-bg-secondary: #F1F5F9;
    --color-bg-tertiary: #E2E8F0;
    --color-bg-card: #FFFFFF;
    --color-bg-card-hover: #F8FAFC;
    --color-bg-elevated: #FFFFFF;
    --color-bg-glass: rgba(255, 255, 255, 0.88);
    --color-bg-glass-light: rgba(255, 255, 255, 0.6);

    /* Surfaces */
    --color-surface-1: #FFFFFF;
    --color-surface-2: #F1F5F9;
    --color-surface-3: #E2E8F0;
    --color-border: rgba(15, 23, 42, 0.08);
    --color-border-light: rgba(15, 23, 42, 0.14);
    --color-border-focus: var(--color-primary-teal-dark);

    /* Text Colors */
    --color-text-primary: #0F172A;
    --color-text-secondary: #475569;
    --color-text-tertiary: #64748B;
    --color-text-inverse: #F8FAFC;
    --color-text-accent: var(--color-primary-teal-dark);
    --color-text-link: var(--color-primary-blue);
    --color-text-link-hover: var(--color-primary-teal-dark);

    /* Shadows for Light Mode */
    --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.05);
    --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 10px 25px rgba(15, 23, 42, 0.1);
    --shadow-xl: 0 20px 40px rgba(15, 23, 42, 0.12);
    --shadow-glow-teal: 0 0 25px rgba(59, 191, 160, 0.25);
    --shadow-glow-blue: 0 0 25px rgba(26, 115, 232, 0.2);
    --shadow-glow-brand: 0 0 35px rgba(59, 191, 160, 0.2), 0 0 60px rgba(26, 115, 232, 0.12);
}

:root {

    /* ─── Typography ─── */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-display: 'Outfit', 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Font Sizes — fluid scale */
    --text-xs: clamp(0.7rem, 0.68rem + 0.1vw, 0.75rem);
    --text-sm: clamp(0.8rem, 0.77rem + 0.15vw, 0.875rem);
    --text-base: clamp(0.9rem, 0.87rem + 0.15vw, 1rem);
    --text-lg: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
    --text-xl: clamp(1.15rem, 1.05rem + 0.5vw, 1.25rem);
    --text-2xl: clamp(1.3rem, 1.1rem + 1vw, 1.5rem);
    --text-3xl: clamp(1.6rem, 1.3rem + 1.5vw, 1.875rem);
    --text-4xl: clamp(1.9rem, 1.4rem + 2.5vw, 2.25rem);
    --text-5xl: clamp(2.2rem, 1.5rem + 3.5vw, 3rem);
    --text-6xl: clamp(2.5rem, 1.5rem + 5vw, 3.75rem);
    --text-hero: clamp(2.8rem, 1.5rem + 6.5vw, 4.5rem);

    /* Font Weights */
    --weight-light: 300;
    --weight-regular: 400;
    --weight-medium: 500;
    --weight-semibold: 600;
    --weight-bold: 700;
    --weight-extrabold: 800;

    /* Line Heights */
    --leading-tight: 1.15;
    --leading-snug: 1.3;
    --leading-normal: 1.5;
    --leading-relaxed: 1.65;
    --leading-loose: 1.8;

    /* Letter Spacing */
    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.025em;
    --tracking-wider: 0.05em;
    --tracking-widest: 0.1em;

    /* ─── Spacing Scale ─── */
    --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 */

    /* Section spacing */
    --section-padding: clamp(4rem, 3rem + 5vw, 8rem);

    /* ─── Border Radius ─── */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* ─── Shadows ─── */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.45);
    --shadow-glow-teal: 0 0 20px rgba(59, 191, 160, 0.15);
    --shadow-glow-blue: 0 0 20px rgba(26, 115, 232, 0.15);
    --shadow-glow-brand: 0 0 30px rgba(59, 191, 160, 0.1), 0 0 60px rgba(26, 115, 232, 0.05);

    /* ─── Transitions ─── */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    --transition-slower: 600ms ease;
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* ─── Z-Index Scale ─── */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-navbar: 500;
    --z-modal-backdrop: 800;
    --z-modal: 900;
    --z-toast: 950;
    --z-chat: 1000;

    /* ─── Container ─── */
    --container-max: 1200px;
    --container-wide: 1400px;
    --container-narrow: 800px;
    --container-padding: clamp(1rem, 0.5rem + 2.5vw, 2rem);

    /* ─── Navbar ─── */
    --navbar-height: 72px;
    --navbar-bg: rgba(10, 10, 26, 0.85);
    --navbar-blur: 20px;
}