/* =========================================================
   Variables
   ========================================================= */
:root {
  /* Color palette - cool, neutral, professional */
  --color-background: #f5f7fa;
  --color-surface: #ffffff;
  --color-surface-soft: #f0f2f6;

  --color-text: #141824;
  --color-text-muted: #6b7280;
  --color-border-subtle: #d1d5db;

  --color-primary: #2563eb;
  --color-primary-soft: rgba(37, 99, 235, 0.08);
  --color-primary-strong: #1d4ed8;

  --color-success: #16a34a;
  --color-warning: #f59e0b;
  --color-danger: #dc2626;

  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2933;
  --gray-900: #111827;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-heading: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-base: 1rem;    /* 16px */
  --font-size-md: 1.0625rem; /* 17px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem;  /* 36px */

  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing scale (px converted to rem based on 16px) */
  --space-0: 0;
  --space-1: 0.25rem;  /* 4px */
  --space-2: 0.5rem;   /* 8px */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1rem;     /* 16px */
  --space-5: 1.25rem;  /* 20px */
  --space-6: 1.5rem;   /* 24px */
  --space-8: 2rem;     /* 32px */
  --space-10: 2.5rem;  /* 40px */
  --space-12: 3rem;    /* 48px */
  --space-16: 4rem;    /* 64px */
  --space-20: 5rem;    /* 80px */
  --space-24: 6rem;    /* 96px */

  /* Radius */
  --radius-sm: 0.25rem;    /* 4px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-pill: 999px;

  /* Shadows - subtle and architectural */
  --shadow-sm: 0 4px 10px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.10);
  --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.16);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-base: 180ms ease-out;
  --transition-slow: 240ms ease-out;

  /* Layout */
  --container-max-width: 1200px;
}

/* Respect reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-fast: 0ms;
    --transition-base: 0ms;
    --transition-slow: 0ms;
  }
}

/* =========================================================
   Reset / Normalize
   ========================================================= */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

body {
  margin: 0;
}

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

ul[role='list'],
ol[role='list'] {
  list-style: none;
  padding: 0;
  margin: 0;
}

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

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

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

/* Remove default link styling baseline */
a {
  color: inherit;
  text-decoration: none;
}

/* =========================================================
   Base Styles
   ========================================================= */
body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  background-color: var(--color-background);
  color: var(--color-text);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

main {
  min-height: 60vh;
}

/* Headings - minimalist hierarchy for corporate feel */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-text);
  line-height: var(--line-height-tight);
}

h1 {
  font-size: var(--font-size-4xl);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

h2 {
  font-size: var(--font-size-3xl);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-3);
}

h4 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-2);
}

h5 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-2);
}

h6 {
  font-size: var(--font-size-base);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

p {
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

p.small,
small {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Minimalist, understated link style */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base),
              opacity var(--transition-fast);
}

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

a:active {
  opacity: 0.8;
}

/* Selection */
::selection {
  background-color: var(--color-primary-soft);
  color: var(--color-text);
}

/* =========================================================
   Accessibility & Focus
   ========================================================= */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* Screen-reader only helper */
.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;
}

/* =========================================================
   Utilities
   ========================================================= */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

/* Flex utilities */
.flex {
  display: flex;
}

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

.flex-row {
  flex-direction: row;
}

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

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

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

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

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-2 {
  gap: var(--space-2);
}

.gap-4 {
  gap: var(--space-4);
}

.gap-6 {
  gap: var(--space-6);
}

/* Grid utilities */
.grid {
  display: grid;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* Width helpers for layout refinement */
.w-full { width: 100%; }

.max-w-prose { max-width: 70ch; }

/* Text alignment */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

/* Spacing utilities (common subset) */
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-6 { margin-bottom: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-8 { margin-bottom: var(--space-8); }

.pt-8 { padding-top: var(--space-8); }
.pb-8 { padding-bottom: var(--space-8); }
.pt-12 { padding-top: var(--space-12); }
.pb-12 { padding-bottom: var(--space-12); }

/* Visually separated sections */
.section {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

.section--alt {
  background-color: var(--color-surface-soft);
}

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

/* Buttons - primary CTA & secondary outline */
.button,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-sm);
  font-weight: 500;
  line-height: 1;
  border: 1px solid transparent;
  cursor: pointer;
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-base),
              box-shadow var(--transition-base),
              transform var(--transition-fast),
              border-color var(--transition-base),
              color var(--transition-base);
}

.button:hover,
.btn:hover {
  background-color: var(--color-primary-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  color: #ffffff;
}

.button:active,
.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.button--secondary,
.btn--secondary {
  background-color: transparent;
  color: var(--color-text);
  border-color: var(--gray-300);
  box-shadow: none;
}

.button--secondary:hover,
.btn--secondary:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
  box-shadow: none;
  color: var(--color-text);
}

.button--ghost,
.btn--ghost {
  background-color: transparent;
  color: var(--color-primary);
  border-color: transparent;
  box-shadow: none;
}

.button--ghost:hover,
.btn--ghost:hover {
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
}

.button:disabled,
.btn:disabled,
.button[aria-disabled='true'],
.btn[aria-disabled='true'] {
  cursor: not-allowed;
  opacity: 0.55;
  box-shadow: none;
  transform: none;
}

/* Inputs & form controls */
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
input[type="password"],
input[type="search"],
select,
textarea {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: 1.4;
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base),
              background-color var(--transition-base);
}

input::placeholder,
textarea::placeholder {
  color: var(--color-text-muted);
}

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

textarea {
  min-height: 120px;
  resize: vertical;
}

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

label {
  display: inline-block;
  margin-bottom: var(--space-1);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
}

/* Cards - for case studies, team, testimonials, careers */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(15, 23, 42, 0.03);
  transition: box-shadow var(--transition-base),
              transform var(--transition-base),
              border-color var(--transition-base);
}

.card--interactive:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(37, 99, 235, 0.18);
}

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

.card-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-2);
}

.card-meta {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.card-body {
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

/* Media framing for large office visuals */
.media-frame {
  border-radius: var(--radius-xl);
  overflow: hidden;
  background-color: var(--gray-200);
}

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

/* Tag / pill for categories (e.g., services, sectors) */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.65rem;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background-color: var(--color-primary-soft);
  color: var(--color-primary-strong);
}

/* Status badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.badge--success { background-color: rgba(22, 163, 74, 0.08); color: var(--color-success); }
.badge--warning { background-color: rgba(245, 158, 11, 0.10); color: var(--color-warning); }
.badge--danger  { background-color: rgba(220, 38, 38, 0.10); color: var(--color-danger); }

/* Minimalist divider */
.divider {
  border: 0;
  border-top: 1px solid var(--gray-200);
  margin: var(--space-6) 0;
}

/* Hero section helper for premium first impression */
.hero {
  padding-top: var(--space-20);
  padding-bottom: var(--space-16);
}

@media (max-width: 768px) {
  .hero {
    padding-top: var(--space-16);
    padding-bottom: var(--space-12);
  }
}

.hero-title {
  font-size: clamp(2.25rem, 4vw, 3rem);
  letter-spacing: -0.035em;
}

.hero-subtitle {
  margin-top: var(--space-3);
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 48ch;
}

/* Testimonials / quotes */
.quote {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
}

.quote-mark {
  font-size: 3rem;
  line-height: 1;
  color: var(--gray-200);
}

/* Tables (for specs or job listings) */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

thead {
  background-color: var(--gray-50);
}

th,
td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}

th {
  font-weight: 600;
  color: var(--color-text);
}

tr:hover td {
  background-color: rgba(15, 23, 42, 0.01);
}

/* Footer baseline */
.footer {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.footer a {
  color: inherit;
}

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