/* base.css — Ortiz Engineering Design Tokens + Reset */

:root {
  /* Type Scale (fluid) */
  --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);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* 4px Spacing System */
  --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;

  /* Fonts */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'DM Sans', 'Helvetica Neue', Arial, sans-serif;

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

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);

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

/* ===== LIGHT MODE (Steel Blue/Navy Palette) ===== */
:root, [data-theme="light"] {
  /* Surfaces (warm neutral) */
  --color-bg:               #F5F3EF;
  --color-surface:          #FAF9F6;
  --color-surface-2:        #FFFFFF;
  --color-surface-offset:   #EDE9E3;
  --color-surface-offset-2: #E5E1DA;
  --color-surface-dynamic:  #DDD9D2;
  --color-divider:          #D0CBC4;
  --color-border:           #C5C0B8;

  /* Text */
  --color-text:           #1A1A1A;
  --color-text-muted:     #5C5C5C;
  --color-text-faint:     #9A9790;
  --color-text-inverse:   #F5F3EF;

  /* Primary Accent — Steel Blue/Navy */
  --color-primary:        #1B3A5C;
  --color-primary-hover:  #142D48;
  --color-primary-active: #0E2035;
  --color-primary-light:  #2D5F8A;
  --color-primary-highlight: #D4DEE8;

  /* Secondary — Copper/Warm */
  --color-accent:         #8B5E3C;
  --color-accent-hover:   #724C30;

  /* Semantic */
  --color-error:          #A13544;
  --color-warning:        #964219;
  --color-success:        #437A22;

  /* Shadows (warm-toned) */
  --shadow-sm: 0 1px 2px oklch(0.2 0.01 80 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.2 0.01 80 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.2 0.01 80 / 0.12);
}

/* ===== DARK MODE ===== */
[data-theme="dark"] {
  --color-bg:               #111315;
  --color-surface:          #181A1D;
  --color-surface-2:        #1E2024;
  --color-surface-offset:   #1C1E22;
  --color-surface-offset-2: #222529;
  --color-surface-dynamic:  #2A2D31;
  --color-divider:          #2E3136;
  --color-border:           #3A3D42;

  --color-text:           #D4D2CE;
  --color-text-muted:     #8A8884;
  --color-text-faint:     #5C5A57;
  --color-text-inverse:   #1A1A1A;

  --color-primary:        #6B9DC8;
  --color-primary-hover:  #5489B5;
  --color-primary-active: #4075A0;
  --color-primary-light:  #8AB5D9;
  --color-primary-highlight: #1E2D3C;

  --color-accent:         #C49070;
  --color-accent-hover:   #B07E5E;

  --color-error:          #DD6974;
  --color-warning:        #BB653B;
  --color-success:        #6DAA45;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
  --shadow-md: 0 4px 12px oklch(0 0 0 / 0.3);
  --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.4);
}

/* System preference fallback */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:               #111315;
    --color-surface:          #181A1D;
    --color-surface-2:        #1E2024;
    --color-surface-offset:   #1C1E22;
    --color-surface-offset-2: #222529;
    --color-surface-dynamic:  #2A2D31;
    --color-divider:          #2E3136;
    --color-border:           #3A3D42;

    --color-text:           #D4D2CE;
    --color-text-muted:     #8A8884;
    --color-text-faint:     #5C5A57;
    --color-text-inverse:   #1A1A1A;

    --color-primary:        #6B9DC8;
    --color-primary-hover:  #5489B5;
    --color-primary-active: #4075A0;
    --color-primary-light:  #8AB5D9;
    --color-primary-highlight: #1E2D3C;

    --color-accent:         #C49070;
    --color-accent-hover:   #B07E5E;

    --color-error:          #DD6974;
    --color-warning:        #BB653B;
    --color-success:        #6DAA45;

    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
    --shadow-md: 0 4px 12px oklch(0 0 0 / 0.3);
    --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.4);
  }
}

/* ===== RESET + BASE ===== */
*, *::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: var(--space-16);
}

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: oklch(from var(--color-primary) l c h / 0.25);
  color: var(--color-text);
}

: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;
}