/* ========================================================================== 
   Variables
   ========================================================================== */

:root {
  /* Color Palette - Soft neutrals, deep charcoals, metallic accents */
  --color-background: #f5f3f0; /* soft warm neutral */
  --color-surface: #ffffff;
  --color-surface-muted: #f0eeeb;
  --color-text: #222222;
  --color-text-muted: #666666;
  --color-border-subtle: #e0ddd8;
  --color-border-strong: #c4beb4;

  --color-primary: #b68a55; /* warm metallic accent (brushed brass) */
  --color-primary-soft: rgba(182, 138, 85, 0.12);
  --color-primary-strong: #8e6a3f;

  --color-success: #3a7f5d;
  --color-success-soft: rgba(58, 127, 93, 0.12);
  --color-warning: #c98a2e;
  --color-warning-soft: rgba(201, 138, 46, 0.12);
  --color-danger: #b34747;
  --color-danger-soft: rgba(179, 71, 71, 0.12);

  --gray-50: #f9f8f6;
  --gray-100: #f0eeeb;
  --gray-200: #e3dfd8;
  --gray-300: #d1cbc1;
  --gray-400: #b9b1a5;
  --gray-500: #9b9183;
  --gray-600: #7a7166;
  --gray-700: #5b5248;
  --gray-800: #3b3732;
  --gray-900: #1f1d1a;

  /* Typography */
  --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: "Playfair Display", "Times New Roman", serif;
  --font-mono: "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Font sizes (rem-based scale) */
  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-base: 1rem;    /* 16px */
  --font-size-md: 1.0625rem; /* 17px - comfortable body copy */
  --font-size-lg: 1.25rem;   /* 20px */
  --font-size-xl: 1.5rem;    /* 24px */
  --font-size-2xl: 1.875rem; /* 30px */
  --font-size-3xl: 2.25rem;  /* 36px */
  --font-size-4xl: 3rem;     /* 48px hero headline */

  /* Line heights */
  --line-height-tight: 1.1;
  --line-height-snug: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing scale (px converted to rem at 16px base) */
  --space-0: 0;
  --space-4: 0.25rem;  /* 4px */
  --space-8: 0.5rem;   /* 8px */
  --space-12: 0.75rem; /* 12px */
  --space-16: 1rem;    /* 16px */
  --space-20: 1.25rem; /* 20px */
  --space-24: 1.5rem;  /* 24px */
  --space-32: 2rem;    /* 32px */
  --space-40: 2.5rem;  /* 40px */
  --space-48: 3rem;    /* 48px */
  --space-56: 3.5rem;  /* 56px */
  --space-64: 4rem;    /* 64px */
  --space-80: 5rem;    /* 80px */
  --space-96: 6rem;    /* 96px */

  /* Radii */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  /* Shadows - subtle, architectural */
  --shadow-xs: 0 1px 2px rgba(15, 14, 10, 0.08);
  --shadow-sm: 0 4px 12px rgba(15, 14, 10, 0.08);
  --shadow-md: 0 10px 30px rgba(15, 14, 10, 0.12);
  --shadow-lg: 0 20px 60px rgba(15, 14, 10, 0.18);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-base: 200ms ease-out;
  --transition-slow: 320ms ease-out;

  /* Layout */
  --container-max-width: 1120px;
  --container-padding-inline: 1.5rem;
}

/* ========================================================================== 
   Reset / Normalize
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
}

h1, h2, h3, h4, h5, h6,
p, figure, blockquote,
dl, dd,
ul, ol,
pre {
  margin: 0;
}

ul, ol {
  padding-left: 1.25em;
}

a {
  text-decoration: none;
  color: inherit;
}

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

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  border: none;
  background: none;
  padding: 0;
  cursor: pointer;
}

textarea {
  resize: vertical;
}

:focus {
  outline: none;
}

/* ========================================================================== 
   Base Styles
   ========================================================================== */

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-md);
  line-height: var(--line-height-relaxed);
  background-color: var(--color-background);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: var(--line-height-tight);
  color: var(--gray-900);
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(2.25rem, 2.6vw, var(--font-size-4xl));
  margin-bottom: var(--space-24);
}

h2 {
  font-size: clamp(1.875rem, 2.1vw, var(--font-size-3xl));
  margin-bottom: var(--space-20);
}

h3 {
  font-size: clamp(1.5rem, 1.7vw, var(--font-size-2xl));
  margin-bottom: var(--space-16);
}

h4 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-12);
}

h5 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-8);
}

h6 {
  font-size: var(--font-size-base);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-8);
}

p {
  margin-bottom: var(--space-16);
  color: var(--color-text);
}

p + p {
  margin-top: -0.25em;
}

strong {
  font-weight: 600;
}

small {
  font-size: var(--font-size-sm);
}

abbr[title] {
  text-decoration: underline dotted;
  text-underline-offset: 0.1em;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  text-underline-offset: 0.15em;
  transition: color var(--transition-base), text-decoration-color var(--transition-base);
}

a:hover {
  color: var(--color-primary-strong);
}

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

hr {
  border: 0;
  border-top: 1px solid var(--color-border-subtle);
  margin: var(--space-32) 0;
}

code, pre, kbd, samp {
  font-family: var(--font-mono);
}

/* ========================================================================== 
   Accessibility & Motion
   ========================================================================== */

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

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ========================================================================== 
   Utilities
   ========================================================================== */

/* Layout */

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--container-padding-inline);
}

.section {
  padding-block: clamp(var(--space-48), 8vh, var(--space-96));
}

.section--tight {
  padding-block: var(--space-40);
}

/* Flex utilities */

.flex {
  display: flex;
}

.inline-flex {
  display: inline-flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.flex-column {
  display: flex;
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.gap-xs { gap: var(--space-8); }
.gap-sm { gap: var(--space-12); }
.gap-md { gap: var(--space-16); }
.gap-lg { gap: var(--space-24); }
.gap-xl { gap: var(--space-32); }

/* Grid utilities */

.grid {
  display: grid;
  gap: var(--space-24);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-32);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-32);
}

@media (max-width: 900px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Alignment & text utilities */

.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

.text-muted {
  color: var(--color-text-muted);
}

.text-uppercase {
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Spacing utilities (margin & padding) */

.mt-0 { margin-top: 0 !important; }
.mt-xs { margin-top: var(--space-8) !important; }
.mt-sm { margin-top: var(--space-12) !important; }
.mt-md { margin-top: var(--space-16) !important; }
.mt-lg { margin-top: var(--space-24) !important; }
.mt-xl { margin-top: var(--space-32) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-xs { margin-bottom: var(--space-8) !important; }
.mb-sm { margin-bottom: var(--space-12) !important; }
.mb-md { margin-bottom: var(--space-16) !important; }
.mb-lg { margin-bottom: var(--space-24) !important; }
.mb-xl { margin-bottom: var(--space-32) !important; }

.pt-0 { padding-top: 0 !important; }
.pt-sm { padding-top: var(--space-12) !important; }
.pt-md { padding-top: var(--space-16) !important; }
.pt-lg { padding-top: var(--space-24) !important; }
.pt-xl { padding-top: var(--space-32) !important; }

.pb-0 { padding-bottom: 0 !important; }
.pb-sm { padding-bottom: var(--space-12) !important; }
.pb-md { padding-bottom: var(--space-16) !important; }
.pb-lg { padding-bottom: var(--space-24) !important; }
.pb-xl { padding-bottom: var(--space-32) !important; }

/* Max-width helpers for content blocks */

.prose-narrow {
  max-width: 640px;
}

.prose-wide {
  max-width: 780px;
}

/* Screen reader only */

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

.sr-only-focusable:active,
.sr-only-focusable:focus-visible {
  position: static;
  width: auto;
  height: auto;
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* ========================================================================== 
   Components
   ========================================================================== */

/* Buttons */

.button,
button,
input[type="submit"],
input[type="button"],
input[type="reset"] {
  --btn-bg: var(--color-primary);
  --btn-color: #ffffff;
  --btn-border: transparent;
  --btn-bg-hover: var(--color-primary-strong);
  --btn-color-hover: #ffffff;
  --btn-bg-disabled: var(--gray-200);
  --btn-color-disabled: var(--gray-500);

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  padding: 0.7rem 1.6rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--btn-border);
  background-color: var(--btn-bg);
  color: var(--btn-color);
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition-base),
              color var(--transition-base),
              box-shadow var(--transition-base),
              transform var(--transition-fast);
  box-shadow: var(--shadow-xs);
}

.button:hover,
button:hover,
input[type="submit"]:hover,
input[type="button"]:hover,
input[type="reset"]:hover {
  background-color: var(--btn-bg-hover);
  color: var(--btn-color-hover);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.button:active,
button:active,
input[type="submit"]:active,
input[type="button"]:active,
input[type="reset"]:active {
  transform: translateY(0);
  box-shadow: var(--shadow-xs);
}

.button:focus-visible,
button:focus-visible,
input[type="submit"]:focus-visible,
input[type="button"]:focus-visible,
input[type="reset"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.button[disabled],
button[disabled],
input[type="submit"][disabled],
input[type="button"][disabled],
input[type="reset"][disabled] {
  cursor: not-allowed;
  background-color: var(--btn-bg-disabled);
  color: var(--btn-color-disabled);
  box-shadow: none;
}

/* Button variants */

.button--ghost {
  --btn-bg: transparent;
  --btn-border: var(--color-border-strong);
  --btn-color: var(--color-text);
  --btn-bg-hover: var(--color-primary-soft);
  --btn-color-hover: var(--color-text);
  box-shadow: none;
}

.button--subtle {
  --btn-bg: var(--color-surface-muted);
  --btn-border: transparent;
  --btn-color: var(--color-text);
  --btn-bg-hover: var(--gray-200);
  --btn-color-hover: var(--color-text);
  box-shadow: none;
}

/* Form elements */

label {
  display: inline-block;
  margin-bottom: var(--space-4);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-700);
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
input[type="number"],
input[type="password"],
input[type="search"],
select,
textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base),
              background-color var(--transition-base);
}

input::placeholder,
textarea::placeholder {
  color: var(--gray-500);
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px rgba(182, 138, 85, 0.25);
}

input[disabled],
select[disabled],
textarea[disabled] {
  background-color: var(--gray-100);
  color: var(--gray-500);
  cursor: not-allowed;
}

/* Cards - for project highlights, service blocks, insights */

.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(0, 0, 0, 0.02);
  box-shadow: var(--shadow-sm);
  padding: var(--space-24);
  overflow: hidden;
}

.card--muted {
  background-color: var(--color-surface-muted);
  border-color: transparent;
  box-shadow: none;
}

.card__media {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-20);
}

.card__media img,
.card__media picture {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card__header {
  margin-bottom: var(--space-12);
}

.card__title {
  margin-bottom: var(--space-4);
}

.card__meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.card__body {
  color: var(--color-text);
}

.card__footer {
  margin-top: var(--space-20);
}

/* Image treatments for high-resolution project photography */

.image-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--gray-800);
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.01);
  transition: transform var(--transition-slow), filter var(--transition-slow), opacity var(--transition-slow);
}

.image-frame:hover img {
  transform: scale(1.03);
  filter: saturate(1.02);
}

/* Subtle overlay for text over imagery */

.image-overlay-gradient::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 9, 6, 0.65), transparent 55%);
  pointer-events: none;
}

/* Tag / Pill for meta details like SIC code */

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.75rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-subtle);
  background-color: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gray-700);
}

.tag--primary {
  border-color: rgba(182, 138, 85, 0.4);
  color: var(--color-primary-strong);
}

/* Callout / notice (for consultation, contact, SIC info etc.) */

.callout {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-surface);
  padding: var(--space-20) var(--space-24);
}

.callout--accent {
  border-color: rgba(182, 138, 85, 0.4);
  background: linear-gradient(135deg, rgba(182, 138, 85, 0.05), rgba(255, 255, 255, 0.95));
}

.callout__title {
  margin-bottom: var(--space-8);
}

.callout__body {
  color: var(--color-text-muted);
}

/* End of base.css */