/* =========================================================
   Technoknowledge: design tokens
   Change colours, fonts and sizes HERE ONLY.
   Every other CSS file uses these variables.
   ========================================================= */
:root {
  /* ---- brand colours (taken from the logo) ---- */
  --navy: #13294B;          /* main brand / headings / footer */
  --navy-dark: #0E1E38;     /* top bar, hover on navy */
  --navy-soft: #E8EDF5;     /* light navy tint for backgrounds */
  --yellow: #FFD400;        /* logo yellow: primary buttons, highlights */
  --yellow-hover: #FFE14D;
  --yellow-soft: #FFF6CC;
  --blue: #1F6CB0;          /* logo "KNOWLEDGE" blue: links */
  --sky: #009FE3;           /* logo "TECHNO" blue: accents */
  --sky-soft: #E2F4FC;
  --orange: #FA4F01;        /* logo ring orange: small accents only */
  --orange-soft: #FFECE3;
  --green: #2E8B57;         /* success, robotics accents */
  --green-soft: #E3F3EA;
  --red: #C8321F;           /* form errors */
  --red-soft: #FCEBE8;
  --whatsapp: #1FA855;

  /* ---- neutrals ---- */
  --text: #1B1F2A;
  --text-muted: #4A5263;
  --text-soft: #6B7385;
  --bg: #FFFFFF;
  --bg-soft: #F6F7FA;
  --border: #E3E7EF;
  --border-strong: #CDD4E0;

  /* ---- type (Google Fonts: Sora + Nunito Sans) ---- */
  --font-heading: 'Sora', 'Segoe UI', system-ui, sans-serif;
  --font-body: 'Nunito Sans', 'Segoe UI', system-ui, sans-serif;

  /* fluid type scale (mobile → desktop) */
  --fs-xs: 0.8125rem;                                   /* 13px */
  --fs-sm: 0.9375rem;                                   /* 15px */
  --fs-base: 1.0625rem;                                 /* 17px */
  --fs-lg: 1.1875rem;                                   /* 19px */
  --fs-h4: 1.1875rem;
  --fs-h3: clamp(1.3125rem, 1.15rem + 0.6vw, 1.5625rem);
  --fs-h2: clamp(1.75rem, 1.35rem + 1.5vw, 2.5rem);
  --fs-h1: clamp(2.125rem, 1.5rem + 2.6vw, 3.5rem);

  /* ---- spacing ---- */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --section-space: clamp(56px, 3rem + 4vw, 104px);

  /* ---- layout ---- */
  --container: 1240px;
  --gutter: 20px;
  --header-h: 72px;

  /* ---- shape & depth ---- */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-btn: 10px;     /* buttons */
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(19, 41, 75, 0.06), 0 1px 3px rgba(19, 41, 75, 0.08);
  --shadow-md: 0 6px 18px rgba(19, 41, 75, 0.08), 0 2px 6px rgba(19, 41, 75, 0.05);
  --shadow-lg: 0 22px 48px rgba(19, 41, 75, 0.14), 0 6px 14px rgba(19, 41, 75, 0.06);
  --focus-ring: 0 0 0 3px var(--bg), 0 0 0 5px var(--blue);

  /* ---- motion ---- */
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --t-fast: 150ms;
  --t-med: 260ms;
}

@media (min-width: 640px) {
  :root { --gutter: 28px; }
}
@media (min-width: 1100px) {
  :root { --gutter: 32px; --header-h: 80px; }
}