/* ============================================================
   Black Ink Business Services - Design System
   Professional Minimalism: Clean, spacious, intelligent
   ============================================================ */

/* --- CSS Custom Properties (Brand Tokens) --- */
:root {
  /* Primary Colors */
  --color-black: #000000;
  --color-white: #FFFFFF;
  --color-gray-medium: #333333;
  --color-gray-light: #F5F5F5;

  /* Accent Colors */
  --color-charcoal: #1A1A1A;
  --color-gray-warm: #666666;
  --color-off-white: #FAFAFA;

  /* Functional Colors */
  --color-border: #CCCCCC;
  --color-border-focus: #333333;
  --color-error: #333333;
  --color-success: #333333;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-size-h1: 2.5rem;    /* 40px */
  --font-size-h2: 1.875rem;  /* 30px */
  --font-size-h3: 1.375rem;  /* 22px */
  --font-size-body: 1rem;     /* 16px */
  --font-size-small: 0.875rem; /* 14px */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-body: 1.7;
  --line-height-heading: 1.2;

  /* Spacing (8px Grid) */
  --space-xs: 0.5rem;   /* 8px */
  --space-sm: 1rem;      /* 16px */
  --space-md: 1.5rem;    /* 24px */
  --space-lg: 2rem;      /* 32px */
  --space-xl: 3rem;      /* 48px */
  --space-xxl: 4rem;     /* 64px */
  --space-xxxl: 5rem;    /* 80px */

  /* Shadows */
  --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-elevated: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-modal: 0 8px 32px rgba(0, 0, 0, 0.16);

  /* Borders */
  --border-radius: 4px;
  --border-radius-sm: 2px;
  --border-width: 1px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Layout */
  --max-width: 1200px;
  --max-width-form: 600px;
  --header-height: 72px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-body);
  color: var(--color-gray-medium);
  background-color: var(--color-white);
  min-height: 100vh;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-black);
  line-height: var(--line-height-heading);
  font-weight: var(--font-weight-bold);
}

h1 {
  font-size: var(--font-size-h1);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-semibold);
}

h3 {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-medium);
}

p {
  margin-bottom: var(--space-sm);
}

a {
  color: var(--color-black);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: opacity var(--transition-fast);
}

a:hover {
  opacity: 0.7;
}

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

small {
  font-size: var(--font-size-small);
  color: var(--color-gray-warm);
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container--narrow {
  max-width: var(--max-width-form);
}

/* --- Header --- */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 var(--space-md);
  border-bottom: none;
  background-color: var(--color-black);
}

.site-header__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  gap: var(--space-xs);
}

.site-header__logo img,
.site-header__logo svg {
  height: 62px;
  width: auto;
  filter: invert(1);
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.site-header__nav a {
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

.site-header__nav a:hover,
.site-header__nav a[aria-current="page"] {
  color: var(--color-white);
  opacity: 1;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.02em;
  line-height: 1;
  border: 2px solid transparent;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--color-black);
  outline-offset: 2px;
}

.btn--primary {
  background-color: var(--color-black);
  color: var(--color-white);
  border-color: var(--color-black);
  padding: 12px 24px;
}

.btn--primary:hover {
  opacity: 0.85;
}

.btn--primary:active {
  opacity: 0.75;
}

.btn--primary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn--secondary {
  background-color: var(--color-white);
  color: var(--color-black);
  border-color: var(--color-black);
  padding: 12px 24px;
}

.btn--secondary:hover {
  background-color: var(--color-gray-light);
}

.btn--large {
  padding: 16px 32px;
  font-size: 1.0625rem;
}

/* Loading spinner for buttons */
.btn--loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.btn--loading::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-white);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --- Cards --- */
.card {
  background-color: var(--color-white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-elevated);
  transform: translateY(-1px);
}

/* --- Utility Classes --- */
.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;
}

.text-center { text-align: center; }
.text-small { font-size: var(--font-size-small); color: var(--color-gray-warm); }

/* --- Footer --- */
.intranet-footer {
  background: var(--color-black);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-xl) 0;
  margin-top: var(--space-xl);
  text-align: center;
}

.intranet-footer p,
.intranet-footer span {
  margin: 0;
  font-size: var(--font-size-small);
  line-height: 1.6;
}

.intranet-footer__copyright {
  color: rgba(255, 255, 255, 0.9);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-xs) !important;
}

.intranet-footer__locations {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
  flex-wrap: wrap;
}

.intranet-footer__locations span {
  position: relative;
}

.intranet-footer__locations span:not(:last-child)::after {
  content: "";
  position: absolute;
  right: calc(var(--space-md) / -2);
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 3px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
}

.intranet-footer__contact {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.intranet-footer__contact:hover {
  color: var(--color-white);
}

.intranet-footer__clock {
  display: block;
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.5);
  margin-top: 2px;
}

/* --- Responsive --- */
@media (max-width: 767px) {
  :root {
    --font-size-h1: 2rem;
    --font-size-h2: 1.5rem;
    --font-size-h3: 1.125rem;
    --header-height: 60px;
  }

  .site-header {
    padding: 0 var(--space-sm);
  }

  .site-header__logo img,
  .site-header__logo svg {
    height: 45px;
  }

  .container {
    padding: 0 var(--space-sm);
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  :root {
    --font-size-h1: 2.25rem;
  }
}

@media (max-width: 480px) {
  .intranet-footer__locations {
    flex-direction: column;
    gap: var(--space-xs);
  }

  .intranet-footer__locations span:not(:last-child)::after {
    display: none;
  }
}