/* ============================================================
   TKM Habitat — Design Tokens
   Source of truth for all design decisions.
   ============================================================ */

:root {
  /* ---- Couleurs primaires (marque TKM) ------------------------- */
  --c-primary:        #0a73ba;
  --c-primary-dark:   #295ca8;
  --c-primary-light:  #54c3e9;
  --c-primary-50:     #eaf4fb;
  --c-primary-100:    #cce4f4;
  --c-primary-200:    #95caea;

  /* ---- Neutres ------------------------------------------------- */
  --c-foreground:     #0F1B2D;
  --c-foreground-2:   #1F2D44;
  --c-muted:          #5A6B7E;
  --c-muted-2:        #8A99AC;
  --c-background:     #FFFFFF;
  --c-surface:        #F7F9FC;
  --c-surface-2:      #EEF3F9;
  --c-border:         #E2E8F0;
  --c-border-strong:  #CBD5E1;

  /* ---- Sémantiques --------------------------------------------- */
  --c-success: #16A34A;
  --c-danger:  #DC2626;
  --c-warning: #F59E0B;
  --c-info:    #0EA5E9;

  /* ---- Gradients ----------------------------------------------- */
  --gradient-brand:   linear-gradient(135deg, #295ca8 0%, #0a73ba 50%, #54c3e9 100%);
  --gradient-brand-soft: linear-gradient(135deg, rgba(41,92,168,0.85) 0%, rgba(10,115,186,0.75) 50%, rgba(84,195,233,0.7) 100%);
  --gradient-overlay: linear-gradient(180deg, rgba(15,27,45,0) 0%, rgba(15,27,45,0.55) 60%, rgba(15,27,45,0.85) 100%);
  --gradient-radial:  radial-gradient(circle at 30% 20%, rgba(84,195,233,0.18) 0%, transparent 60%);

  /* ---- Glassmorphism ------------------------------------------ */
  --glass-bg:         rgba(255,255,255,0.65);
  --glass-bg-strong:  rgba(255,255,255,0.82);
  --glass-bg-dark:    rgba(15,27,45,0.55);
  --glass-border:     rgba(255,255,255,0.35);
  --glass-blur:       16px;
  --glass-blur-lg:    24px;

  /* ---- Typographie -------------------------------------------- */
  --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --fs-xs:    0.75rem;   /* 12px */
  --fs-sm:    0.875rem;  /* 14px */
  --fs-base:  1rem;      /* 16px */
  --fs-lg:    1.125rem;  /* 18px */
  --fs-xl:    1.25rem;   /* 20px */
  --fs-2xl:   1.5rem;    /* 24px */
  --fs-3xl:   1.875rem;  /* 30px */
  --fs-4xl:   2.25rem;   /* 36px */
  --fs-5xl:   3rem;      /* 48px */
  --fs-6xl:   3.75rem;   /* 60px */
  --fs-7xl:   4.5rem;    /* 72px */

  --lh-tight:   1.1;
  --lh-snug:    1.25;
  --lh-normal:  1.5;
  --lh-relaxed: 1.7;

  --fw-light:    300;
  --fw-regular:  400;
  --fw-medium:   500;
  --fw-semibold: 600;
  --fw-bold:     700;

  /* ---- Spacing (échelle 4pt) ---------------------------------- */
  --s-1:  0.25rem;  /* 4 */
  --s-2:  0.5rem;   /* 8 */
  --s-3:  0.75rem;  /* 12 */
  --s-4:  1rem;     /* 16 */
  --s-5:  1.5rem;   /* 24 */
  --s-6:  2rem;     /* 32 */
  --s-7:  3rem;     /* 48 */
  --s-8:  4rem;     /* 64 */
  --s-9:  6rem;     /* 96 */
  --s-10: 8rem;     /* 128 */

  /* ---- Radius ------------------------------------------------- */
  --r-sm:   6px;
  --r-md:   12px;
  --r-lg:   20px;
  --r-xl:   28px;
  --r-2xl:  40px;
  --r-full: 9999px;

  /* ---- Shadows ------------------------------------------------ */
  --sh-sm:    0 1px 2px rgba(15,27,45,0.06);
  --sh-md:    0 4px 12px rgba(15,27,45,0.08);
  --sh-lg:    0 12px 28px rgba(10,115,186,0.15);
  --sh-xl:    0 24px 48px rgba(10,115,186,0.18);
  --sh-glass: 0 8px 32px rgba(10,115,186,0.12);
  --sh-glow:  0 0 32px rgba(84,195,233,0.35);
  --sh-inner: inset 0 1px 0 rgba(255,255,255,0.6);

  /* ---- Layout ------------------------------------------------- */
  --container-max:  1280px;
  --container-pad:  clamp(1rem, 4vw, 2rem);
  --section-py:     clamp(3rem, 8vw, 6rem);

  /* ---- Motion ------------------------------------------------- */
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --t-fast:   150ms;
  --t-base:   250ms;
  --t-slow:   400ms;

  /* ---- Z-index ------------------------------------------------ */
  --z-base:    0;
  --z-content: 10;
  --z-nav:     50;
  --z-modal:   100;
  --z-toast:   200;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --t-fast: 0ms;
    --t-base: 0ms;
    --t-slow: 0ms;
  }
}