/* =========================================================
   HAMILTON PROJECTS LTD — Design System
   Brand: HPL dark teal primary, Solstice yellow accent
   ========================================================= */

:root, [data-theme="light"] {
  /* Surfaces */
  --color-bg: #f7f6f2;
  --color-surface: #ffffff;
  --color-surface-2: #fbfaf6;
  --color-surface-offset: #efede7;
  --color-surface-dynamic: #e6e4df;
  --color-divider: #e2dfd8;
  --color-border: #d4d0c7;

  /* Text */
  --color-text: #1a1a1a;
  --color-text-muted: #5e5d56;
  --color-text-faint: #a4a29b;
  --color-text-inverse: #f7f6f2;

  /* Primary — HPL Teal */
  --color-primary: #1B474D;
  --color-primary-hover: #11343a;
  --color-primary-active: #0a2428;
  --color-primary-highlight: #d6e1e3;

  /* Accent — Solstice Yellow */
  --color-accent: #F5C518;
  --color-accent-hover: #e2b306;
  --color-accent-active: #c29900;
  --color-accent-soft: #fdf4cc;

  /* Functional */
  --color-success: #437A22;
  --color-warning: #964219;

  /* Type */
  --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, 7rem);

  /* 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:  0.25rem;
  --radius-md:  0.5rem;
  --radius-lg:  0.75rem;
  --radius-xl:  1.25rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 600ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(26, 35, 40, 0.06);
  --shadow-md: 0 6px 20px rgba(26, 35, 40, 0.08);
  --shadow-lg: 0 16px 44px rgba(26, 35, 40, 0.12);

  /* Widths */
  --content-narrow: 720px;
  --content-default: 1080px;
  --content-wide: 1280px;

  /* Fonts */
  --font-display: 'Playfair Display', 'Times New Roman', serif;
  --font-body: 'Plus Jakarta Sans', 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

[data-theme="dark"] {
  --color-bg: #111816;
  --color-surface: #161f1d;
  --color-surface-2: #1b2522;
  --color-surface-offset: #202b28;
  --color-surface-dynamic: #2a3633;
  --color-divider: #23302d;
  --color-border: #2e3d39;
  --color-text: #e9e7e0;
  --color-text-muted: #9da19c;
  --color-text-faint: #6a6f6a;
  --color-text-inverse: #111816;
  --color-primary: #60a6ab;
  --color-primary-hover: #7ec0c5;
  --color-primary-active: #4a8a8f;
  --color-primary-highlight: #1f383b;
  --color-accent: #F5C518;
  --color-accent-hover: #ffd43c;
  --color-accent-active: #e2b306;
  --color-accent-soft: #3a3214;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.35);
  --shadow-md: 0 6px 20px rgba(0,0,0,0.45);
  --shadow-lg: 0 16px 44px rgba(0,0,0,0.55);
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--space-16) + var(--space-4));
}

body {
  min-height: 100dvh;
  line-height: 1.55;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg);
  transition: background var(--transition-slow), color var(--transition-slow);
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }

h1, h2, h3, h4 {
  text-wrap: balance;
  line-height: 1.1;
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

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

a { color: inherit; text-decoration: none; transition: color var(--transition-interactive); }

button {
  cursor: pointer;
  background: none;
  border: none;
  font: inherit;
  color: inherit;
}

ul[role="list"], ol[role="list"] { list-style: none; }

::selection { background: var(--color-primary); color: var(--color-text-inverse); }

: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;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

/* ---------- Layout primitives ---------- */
.container { width: 100%; max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-6); }
.container-narrow { max-width: var(--content-narrow); margin-inline: auto; padding-inline: var(--space-6); }
.container-default { max-width: var(--content-default); margin-inline: auto; padding-inline: var(--space-6); }

@media (min-width: 768px) {
  .container, .container-default, .container-narrow { padding-inline: var(--space-10); }
}

section { padding-block: clamp(var(--space-16), 9vw, var(--space-32)); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
[data-theme="dark"] .eyebrow { color: var(--color-accent); }

.rule {
  width: 48px;
  height: 2px;
  background: var(--color-accent);
  margin-top: var(--space-4);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  transition: all var(--transition-interactive);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary { background: var(--color-primary); color: var(--color-text-inverse); }
.btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }

.btn-accent { background: var(--color-accent); color: #111; }
.btn-accent:hover { background: var(--color-accent-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }

.btn-ghost { background: transparent; color: var(--color-text); border-color: var(--color-border); }
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }

.btn-link {
  padding: 0; border-radius: 0; background: transparent;
  color: var(--color-primary); border-bottom: 1px solid currentColor;
  font-weight: 600;
}
[data-theme="dark"] .btn-link { color: var(--color-accent); }