/* ========================================================================
   OHB Base — Design Tokens + Reset
   Warm, trustworthy SaaS palette: teal-blue primary, warm grays, cream whites
   ======================================================================== */

:root {
  /* Type Scale (fluid clamp) */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* 4px Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 300ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'General Sans', 'Helvetica Neue', sans-serif;
}

/* ── LIGHT MODE (default) ──────────────────────────────── */
:root, [data-theme="light"] {
  /* Surfaces — warm cream/white */
  --color-bg:              #faf9f6;
  --color-surface:         #ffffff;
  --color-surface-2:       #f5f3ef;
  --color-surface-offset:  #efeee9;
  --color-surface-offset-2: #e8e6e1;
  --color-divider:         #ddd9d3;
  --color-border:          #d1cdc5;

  /* Text — warm dark grays */
  --color-text:            #1a1a1a;
  --color-text-muted:      #6b6963;
  --color-text-faint:      #a8a49d;
  --color-text-inverse:    #faf9f6;

  /* Primary — Blue (matching app's CTA blue) */
  --color-primary:         #2563eb;
  --color-primary-hover:   #1d4ed8;
  --color-primary-active:  #1e40af;
  --color-primary-subtle:  rgba(37, 99, 235, 0.08);
  --color-primary-highlight: #dbeafe;

  /* Success */
  --color-success:         #16a34a;

  /* Shadows (warm tint) */
  --shadow-sm: 0 1px 2px rgba(28, 25, 18, 0.06);
  --shadow-md: 0 4px 12px rgba(28, 25, 18, 0.08);
  --shadow-lg: 0 12px 32px rgba(28, 25, 18, 0.12);
  --shadow-xl: 0 20px 60px rgba(28, 25, 18, 0.16);

  /* Hero image shadow */
  --shadow-hero: 0 20px 60px rgba(28, 25, 18, 0.18), 0 8px 24px rgba(28, 25, 18, 0.1);
}

/* ── DARK MODE ──────────────────────────────────────────── */
[data-theme="dark"] {
  --color-bg:              #0f1117;
  --color-surface:         #171923;
  --color-surface-2:       #1e2030;
  --color-surface-offset:  #1a1c2a;
  --color-surface-offset-2: #232538;
  --color-divider:         #2a2d3e;
  --color-border:          #353850;

  --color-text:            #e2e1de;
  --color-text-muted:      #9b9994;
  --color-text-faint:      #5f5d58;
  --color-text-inverse:    #0f1117;

  --color-primary:         #60a5fa;
  --color-primary-hover:   #3b82f6;
  --color-primary-active:  #2563eb;
  --color-primary-subtle:  rgba(96, 165, 250, 0.1);
  --color-primary-highlight: rgba(96, 165, 250, 0.15);

  --color-success:         #4ade80;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.45);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.5);
  --shadow-hero: 0 20px 60px rgba(0, 0, 0, 0.5), 0 8px 24px rgba(0, 0, 0, 0.35);
}

/* System preference fallback for users who haven't toggled */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:              #0f1117;
    --color-surface:         #171923;
    --color-surface-2:       #1e2030;
    --color-surface-offset:  #1a1c2a;
    --color-surface-offset-2: #232538;
    --color-divider:         #2a2d3e;
    --color-border:          #353850;

    --color-text:            #e2e1de;
    --color-text-muted:      #9b99994;
    --color-text-faint:      #5f5d58;
    --color-text-inverse:    #0f1117;

    --color-primary:         #60a5fa;
    --color-primary-hover:   #3b82f6;
    --color-primary-active:  #2563eb;
    --color-primary-subtle:  rgba(96, 165, 250, 0.1);
    --color-primary-highlight: rgba(96, 165, 250, 0.15);

    --color-success:         #4ade80;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.45);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.5);
    --shadow-hero: 0 20px 60px rgba(0, 0, 0, 0.5), 0 8px 24px rgba(0, 0, 0, 0.35);
  }
}

/* ── RESET ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  hanging-punctuation: first last;
  scroll-padding-top: 5rem;
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body, sans-serif);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"], ol[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
  line-height: 1.15;
  font-family: var(--font-display);
}

p, li, figcaption { text-wrap: pretty; max-width: 72ch; }

::selection {
  background: rgba(37, 99, 235, 0.2);
  color: var(--color-text);
}

[data-theme="dark"] ::selection {
  background: rgba(96, 165, 250, 0.25);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

button { cursor: pointer; background: none; border: none; }
table { border-collapse: collapse; width: 100%; }

a, button, [role="button"], [role="link"], input, textarea, select {
  transition: color var(--transition-interactive),
              background var(--transition-interactive),
              border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0;
}