/* ============================================================
   AURA Design System — CSS Custom Properties
   Light Modern SaaS Theme
   ============================================================ */

:root {
    /* ── Backgrounds ── */
    --color-bg:             #ffffff;
    --color-bg-secondary:   #f8fafb;
    --color-bg-tertiary:    #f1f5f9;
    --color-surface:        #ffffff;
    --color-surface-raised: #ffffff;

    /* ── Borders ── */
    --color-border:         #e2e8f0;
    --color-border-subtle:  #f1f5f9;
    --color-border-hover:   rgba(20, 184, 166, 0.4);

    /* ── Brand ── */
    --color-primary:        #14b8a6;
    --color-primary-dark:   #0d9488;
    --color-primary-light:  #5eead4;
    --color-primary-dim:    rgba(20, 184, 166, 0.08);
    --color-primary-ghost:  rgba(20, 184, 166, 0.04);
    --color-secondary:      #6366f1;
    --color-accent:         #0ea5e9;

    /* ── Gradients ── */
    --gradient-primary:     linear-gradient(135deg, #14b8a6, #0ea5e9);
    --gradient-hero:        linear-gradient(135deg, #f0fdfa 0%, #ecfdf5 25%, #f0f9ff 50%, #faf5ff 75%, #fdf4ff 100%);
    --gradient-text:        linear-gradient(135deg, #14b8a6, #6366f1);
    --gradient-card-hover:  linear-gradient(135deg, rgba(20,184,166,0.03), rgba(99,102,241,0.03));
    --gradient-cta:         linear-gradient(135deg, #0d9488, #14b8a6, #0ea5e9);
    --gradient-dark:        linear-gradient(135deg, #0f172a, #1e293b);

    /* ── Text ── */
    --color-text:           #0f172a;
    --color-text-secondary: #475569;
    --color-text-muted:     #94a3b8;
    --color-text-on-primary:#ffffff;

    /* ── Semantic ── */
    --color-success:        #10b981;
    --color-warning:        #f59e0b;
    --color-error:          #ef4444;
    --color-info:           #3b82f6;

    /* ── Typography ── */
    --font-primary:   'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono:      'JetBrains Mono', 'Fira Code', monospace;
    --fs-xs:    0.75rem;
    --fs-sm:    0.875rem;
    --fs-base:  1rem;
    --fs-lg:    1.125rem;
    --fs-xl:    1.25rem;
    --fs-2xl:   1.5rem;
    --fs-3xl:   1.875rem;
    --fs-4xl:   2.25rem;
    --fs-5xl:   3rem;
    --fs-hero:  clamp(2.5rem, 5vw, 4.5rem);

    /* ── Spacing ── */
    --sp-xs:  4px;
    --sp-sm:  8px;
    --sp-md:  16px;
    --sp-lg:  24px;
    --sp-xl:  32px;
    --sp-2xl: 48px;
    --sp-3xl: 64px;
    --sp-4xl: 96px;

    /* ── Radii ── */
    --radius-sm:   6px;
    --radius-md:   10px;
    --radius-lg:   16px;
    --radius-xl:   24px;
    --radius-full: 9999px;

    /* ── Shadows ── */
    --shadow-sm:   0 1px 2px rgba(0,0,0,0.04), 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md:   0 4px 6px rgba(0,0,0,0.04), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg:   0 10px 15px rgba(0,0,0,0.04), 0 4px 6px rgba(0,0,0,0.06);
    --shadow-xl:   0 20px 25px rgba(0,0,0,0.06), 0 8px 10px rgba(0,0,0,0.04);
    --shadow-glow: 0 0 40px rgba(20, 184, 166, 0.12);
    --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 0 0 1px rgba(0,0,0,0.04);

    /* ── Transitions ── */
    --ease-fast:   0.15s ease;
    --ease-base:   0.25s ease;
    --ease-slow:   0.4s ease;
    --ease-spring: 0.5s cubic-bezier(0.16, 1, 0.3, 1);

    /* ── Layout ── */
    --container-max:     1200px;
    --container-padding: 24px;
    --nav-height:        72px;
}