/* Pass Design System — colors & type tokens
 * Green primary scale, Inter via Google Fonts.
 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  /* ───── Brand / Primary (Pass Green) ───── */
  --pass-green-50:  #F0FEEF;
  --pass-green-100: #DBFEDA;
  --pass-green-200: #B8FBB7;
  --pass-green-300: #81F580;
  --pass-green-400: #42E741;
  --pass-green-500: #18CF18;
  --pass-green-600: #0FBC0F;  /* PRIMARY */
  --pass-green-700: #0F8610;  /* hover */
  --pass-green-800: #116A12;  /* press */
  --pass-green-900: #105712;
  --pass-green-950: #033005;  /* deepest */

  --color-primary:        var(--pass-green-600);
  --color-primary-hover:  var(--pass-green-700);
  --color-primary-press:  var(--pass-green-800);
  --color-primary-bg:     var(--pass-green-50);
  --color-link:           var(--pass-green-700);

  /* aliases kept for any legacy references; all point to green now */
  --pass-blue-50:  var(--pass-green-50);
  --pass-blue-100: var(--pass-green-100);
  --pass-blue-200: var(--pass-green-200);
  --pass-blue-300: var(--pass-green-300);
  --pass-blue-400: var(--pass-green-400);
  --pass-blue-500: var(--pass-green-500);
  --pass-blue-600: var(--pass-green-600);
  --pass-blue-700: var(--pass-green-700);
  --pass-blue-800: var(--pass-green-800);
  --pass-blue-900: var(--pass-green-900);

  /* ───── Neutrals (Tailwind slate-ish) ───── */
  --color-gray-25:  #FCFCFD;
  --color-gray-50:  #F9FAFB;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-300: #D1D5DB;
  --color-gray-400: #98A2B3;
  --color-gray-500: #6A7282;
  --color-gray-600: #4A5565;
  --color-gray-700: #344054;
  --color-gray-800: #1F2937;
  --color-gray-900: #101828;

  /* Foreground / background semantics */
  --fg-1: #101828;            /* primary text */
  --fg-2: #344054;            /* body */
  --fg-3: #4A5565;            /* secondary */
  --fg-4: #6A7282;            /* muted */
  --fg-5: #98A2B3;            /* placeholder, disabled label */
  --fg-inverse: #FFFFFF;
  --fg-link: var(--color-link);
  --fg-brand: var(--color-primary);

  --bg-page:      #F9FAFB;    /* portal */
  --bg-page-alt:  #FFFFFF;    /* marketing */
  --bg-surface:   #FFFFFF;    /* card */
  --bg-raised:    #F3F4F6;    /* active row / chip */
  --bg-sunken:    #F9FAFB;
  --bg-brand:     var(--color-primary);
  --bg-brand-soft:var(--pass-blue-50);

  --border-default: #E5E7EB;
  --border-strong:  #D1D5DB;
  --border-brand:   var(--color-primary);

  /* ───── Semantic state ───── */
  /* Success is distinct from brand — a stronger, more emerald tone so pass/fail
   * states still register clearly against a green-primary UI. */
  --color-success:      #0E9F6E;
  --color-success-700:  #047857;
  --color-success-bg:   #ECFDF5;
  --color-warning:      #D97706;
  --color-warning-bg:   #FFF7ED;
  --color-danger:       #C70036;
  --color-danger-700:   #9B1C1C;
  --color-danger-bg:    #FDF2F2;
  --color-info:         #1C64F2;
  --color-info-bg:      #EEF6FF;

  /* Accent (celebratory / learner delight) */
  --accent-amber: #FDBA8C;
  --accent-amber-strong: #F97316;

  /* ───── Typography ───── */
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-extrabold: 800;

  /* Tailwind-aligned scale */
  --text-xs:   12px;
  --text-sm:   14px;
  --text-base: 16px;
  --text-lg:   18px;
  --text-xl:   20px;
  --text-2xl:  24px;
  --text-3xl:  30px;
  --text-4xl:  36px;
  --text-5xl:  48px;
  --text-6xl:  60px;

  --leading-tight: 1.2;
  --leading-snug:  1.35;
  --leading-normal:1.5;
  --leading-relaxed:1.625;

  --tracking-tighter: -0.04em;
  --tracking-tight:   -0.025em;
  --tracking-normal:  0;
  --tracking-wide:    0.025em;

  /* ───── Radius ───── */
  --radius-xs:   4px;
  --radius-sm:   6px;
  --radius-md:   8px;
  --radius-lg:   12px;  /* DEFAULT — cards, buttons, inputs */
  --radius-xl:   16px;
  --radius-2xl:  24px;
  --radius-full: 9999px;

  /* ───── Shadows ───── */
  --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
  --shadow:    0 1px 3px 0 rgba(0,0,0,0.1), 0 1px 2px -1px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
  --shadow-inner: inset 0 2px 4px 0 rgba(0,0,0,0.05);
  --shadow-focus: 0 0 0 3px rgba(15,188,15,0.25);

  /* ───── Spacing scale (4-px base) ───── */
  --space-0: 0;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* ───── Motion ───── */
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out:    cubic-bezier(0, 0, 0.2, 1);
  --ease-in:     cubic-bezier(0.4, 0, 1, 1);
  --dur-hover: 150ms;
  --dur-small: 200ms;
  --dur-panel: 300ms;
  --dur-modal: 400ms;
}

/* ───── Base ───── */
html, body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--fg-1);
  background: var(--bg-page-alt);
  -webkit-font-smoothing: antialiased;
  line-height: var(--leading-normal);
}

/* ───── Semantic type classes ───── */
.pass-h1 {
  font-family: var(--font-sans);
  font-weight: var(--fw-extrabold);
  font-size: var(--text-5xl);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--fg-1);
}
.pass-h2 {
  font-weight: var(--fw-bold);
  font-size: var(--text-4xl);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--fg-1);
}
.pass-h3 {
  font-weight: var(--fw-semibold);
  font-size: var(--text-3xl);
  line-height: var(--leading-snug);
  color: var(--fg-1);
}
.pass-h4 {
  font-weight: var(--fw-semibold);
  font-size: var(--text-2xl);
  line-height: var(--leading-snug);
  color: var(--fg-1);
}
.pass-h5 {
  font-weight: var(--fw-semibold);
  font-size: var(--text-xl);
  line-height: var(--leading-snug);
  color: var(--fg-1);
}
.pass-h6 {
  font-weight: var(--fw-semibold);
  font-size: var(--text-lg);
  line-height: var(--leading-snug);
  color: var(--fg-1);
}
.pass-body {
  font-weight: var(--fw-regular);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--fg-2);
}
.pass-body-sm {
  font-weight: var(--fw-regular);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  color: var(--fg-3);
}
.pass-label {
  font-weight: var(--fw-medium);
  font-size: var(--text-sm);
  color: var(--fg-2);
}
.pass-caption {
  font-weight: var(--fw-regular);
  font-size: var(--text-xs);
  color: var(--fg-4);
}
.pass-eyebrow {
  font-weight: var(--fw-semibold);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-primary);
}
.pass-code, code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-raised);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  color: var(--fg-1);
}

/* ───── Primitive utilities used across UI kits ───── */
.pass-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}
.pass-card--hover:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}
.pass-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: inherit;
  font-weight: var(--fw-medium);
  font-size: var(--text-sm);
  line-height: 1;
  padding: 0 var(--space-5);
  height: 40px;
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--dur-hover) var(--ease-in-out),
              color var(--dur-hover) var(--ease-in-out),
              border-color var(--dur-hover) var(--ease-in-out);
}
.pass-btn:focus-visible { outline: none; box-shadow: var(--shadow-focus); }
.pass-btn--primary {
  background: var(--color-primary);
  color: var(--fg-inverse);
}
.pass-btn--primary:hover { background: var(--color-primary-hover); }
.pass-btn--primary:active { background: var(--color-primary-press); box-shadow: var(--shadow-inner); }
.pass-btn--secondary {
  background: var(--bg-surface);
  color: var(--fg-1);
  border-color: var(--border-default);
}
.pass-btn--secondary:hover { background: var(--bg-raised); }
.pass-btn--ghost {
  background: transparent;
  color: var(--fg-2);
}
.pass-btn--ghost:hover { background: var(--bg-raised); color: var(--fg-1); }
.pass-btn--lg { height: 48px; font-size: var(--text-base); padding: 0 var(--space-6); }
.pass-btn--sm { height: 32px; font-size: var(--text-xs); padding: 0 var(--space-3); }

.pass-input {
  font-family: inherit;
  font-size: var(--text-sm);
  color: var(--fg-1);
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 0 var(--space-4);
  height: 42px;
  width: 100%;
  transition: border-color var(--dur-hover) var(--ease-in-out),
              box-shadow var(--dur-hover) var(--ease-in-out);
}
.pass-input::placeholder { color: var(--fg-5); }
.pass-input:focus { outline: none; border-color: var(--color-primary); box-shadow: var(--shadow-focus); }

.pass-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--fw-medium);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  background: var(--bg-raised);
  color: var(--fg-2);
}
.pass-badge--success { background: var(--color-success-bg); color: var(--color-success-700); }
.pass-badge--warning { background: var(--color-warning-bg); color: var(--color-warning); }
.pass-badge--danger  { background: var(--color-danger-bg);  color: var(--color-danger-700); }
.pass-badge--brand   { background: var(--color-primary-bg); color: var(--color-primary); }

/* v2 */