/* ==========================================================================
   Taws.Design: design tokens
   --------------------------------------------------------------------------
   The single source of truth for colour, type, spacing and shape.
   Every component reads from these custom properties. Change a value here
   and it updates everywhere. Documented in design-system.html.
   ========================================================================== */

/* Fonts: self-hosted Latin subsets (no third-party requests) -------------- */
@font-face {
  font-family: "Albert Sans";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("../fonts/albert-sans-latin.woff2") format("woff2");
}

@font-face {
  font-family: "Borel";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/borel-latin.woff2") format("woff2");
}

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 900;
  font-display: swap;
  src: url("../fonts/inter-900-latin.woff2") format("woff2");
}

:root {
  /* ---- Colour: primitives ---------------------------------------------- */
  --navy-900: #07354d;   /* Text and headings: 12.7:1 on canvas */
  --navy-800: #06334a;   /* Buttons */
  --navy-700: #0d4766;   /* Button hover */
  --slate-600: #4a6575;  /* Muted text: 6:1 on canvas */
  --sand-100: #f3f1ef;   /* Card surface */
  --snow-50: #fffcfc;    /* Page canvas */
  --white: #ffffff;
  --black: #000000;
  --sky-200: #b8d3ed;    /* Media band behind screenshots */
  --amber-500: #e8890c;  /* Decorative only: never for text or focus */
  --amber-700: #b35c00;  /* Focus ring on light: 4.6:1 */
  --amber-300: #ffb84d;  /* Focus ring on dark: 12.2:1 */
  --green-500: #16a085;  /* Status dot: decorative, always paired with text */
  --red-700: #b42318;    /* Errors: 6.4:1 */
  --violet-500: #8f55e4; /* Figma-style selection frame: 4:1 on cards. Decorative */
  --violet-100: #ece2fb; /* Accent pill background: navy text 10.4:1 */

  /* ---- Colour: semantic roles (use these in components) ----------------- */
  --color-bg: var(--snow-50);
  --color-surface: var(--sand-100);
  --color-surface-raised: var(--white);
  --color-text: var(--navy-900);
  --color-text-muted: var(--slate-600);
  --color-heading: var(--navy-900);
  --color-link: var(--navy-900);
  --color-action: var(--navy-800);
  --color-action-hover: var(--navy-700);
  --color-on-action: var(--white);
  --color-accent: var(--amber-500);
  --color-focus: var(--amber-700);
  --color-focus-inverse: var(--amber-300);
  --color-media-band: var(--sky-200);
  --color-success: var(--green-500);
  --color-error: var(--red-700);
  --color-frame: var(--violet-500);
  --color-accent-soft: var(--violet-100);
  --color-inverse-bg: var(--black);
  --color-inverse-text: var(--white);
  --color-border: #d9d4cf;
  --color-border-strong: var(--navy-900);

  /* ---- Typography ------------------------------------------------------- */
  --font-sans: "Albert Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-script: "Borel", "Segoe Script", cursive;
  --font-display: "Inter", "Albert Sans", system-ui, sans-serif;

  /* Fluid type scale: 320px to 1440px viewport */
  --text-sm: 0.9375rem;                                   /* 15px: smallest text */
  --text-base: 1.125rem;                                  /* 18px: body */
  --text-label: 1rem;                                     /* 16px: labels, nav, chips */
  --text-lead: clamp(1.25rem, 1.164rem + 0.43vw, 1.5rem);  /* 20 to 24px */
  --text-h3: clamp(1.375rem, 1.226rem + 0.71vw, 1.8125rem); /* 22 to 29px */
  --text-h2: clamp(1.625rem, 1.486rem + 0.71vw, 2rem);     /* 26 to 32px */
  --text-card-title: clamp(1.25rem, 1.164rem + 0.43vw, 1.5rem);
  --text-h1: clamp(2.5rem, 1.786rem + 3.57vw, 4.5rem);     /* 40 to 72px */
  --text-display: clamp(2.5rem, 1.83rem + 3.35vw, 4.375rem); /* 40 to 70px */
  --text-script: 1.5rem;                                   /* 24px */

  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-black: 900;

  --leading-tight: 1.1;
  --leading-snug: 1.4;
  --leading-normal: 1.6;

  --tracking-display: -0.04em;
  --tracking-heading: -0.04em;
  --tracking-body: -0.02em;

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

  --section-gap: clamp(var(--space-8), 6vw, var(--space-10));

  /* ---- Layout ----------------------------------------------------------- */
  --container-max: 75rem;      /* 1200px */
  --container-narrow: 69.375rem; /* 1110px: case studies */
  --container-prose: 40rem;    /* 640px: comfortable line length */
  --gutter: clamp(1rem, 0.5rem + 2.5vw, 2.5rem);

  /* ---- Shape & elevation ----------------------------------------------- */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgb(7 53 77 / 0.08);
  --shadow-md: 0 8px 24px rgb(7 53 77 / 0.12);

  /* ---- Interaction ------------------------------------------------------ */
  --target-min: 44px;          /* Comfortably above the WCAG 2.5.8 minimum */
  --focus-width: 3px;
  --focus-offset: 3px;
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-reveal: cubic-bezier(0.16, 1, 0.3, 1);   /* "expo out": fast, then settles */
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-reveal: 0.7s;
  --duration-intro: 0.8s;                          /* Intro text blur-in */
  --duration-page-out: 0.15s;                      /* Page transition: old page out */
  --duration-page-in: 0.25s;                       /* Page transition: new page in */
}