/* ============================================================
   RTOSure Design System — styles.css
   Version 1.0 | May 2026
   The single source of truth for all RTOSure web styles.
   All pages must import this file.
   ============================================================ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,300;1,9..40,400&display=swap');

/* ── Design Tokens ────────────────────────────────────────── */
:root {
  /* Brand colours */
  --color-navy:        #0f2744;   /* Primary — deep navy */
  --color-navy-mid:    #1a3a62;   /* Slightly lighter navy */
  --color-teal:        #00a896;   /* Primary accent */
  --color-teal-dark:   #007a6e;   /* Teal hover */
  --color-teal-light:  #e6f7f5;   /* Teal tint background */
  --color-teal-mid:    #b3e8e2;   /* Teal mid tone */

  /* Sub-brand accent colours */
  --color-cricos:        #2563eb;   /* CRICOSSure blue */
  --color-cricos-light:  #eff6ff;
  --color-cricos-text:   #60a5fa;   /* CRICOSSure on dark backgrounds */
  --color-elicos:        #7c3aed;   /* ELICOSSure purple */
  --color-elicos-light:  #f5f3ff;
  --color-elicos-text:   #a78bfa;   /* ELICOSSure on dark backgrounds */

  /* Semantic status colours */
  --color-amber:         #f59e0b;   /* Warning / due items */
  --color-amber-light:   #fef3c7;
  --color-green-success: #10b981;   /* Compliant / complete */
  --color-green-light:   #d1fae5;

  /* On-dark surface utilities */
  --color-on-dark-text:        rgba(255,255,255,0.72);  /* Body text on navy/dark */
  --color-on-dark-secondary:   rgba(255,255,255,0.55);  /* Secondary text on dark */
  --color-on-dark-muted:       rgba(255,255,255,0.35);  /* Muted / labels on dark */
  --color-on-dark-border:      rgba(255,255,255,0.08);  /* Borders on dark */
  --color-on-dark-surface:     rgba(255,255,255,0.04);  /* Subtle card bg on dark */
  --color-on-dark-surface-hover: rgba(255,255,255,0.07);

  /* Sub-brand on-dark tints (for dark bg hover states) */
  --color-teal-on-dark-bg:   rgba(0,168,150,0.10);
  --color-teal-on-dark-border: rgba(0,168,150,0.40);
  --color-cricos-on-dark-bg:  rgba(37,99,235,0.10);
  --color-cricos-on-dark-border: rgba(37,99,235,0.40);
  --color-elicos-on-dark-bg:  rgba(124,58,237,0.10);
  --color-elicos-on-dark-border: rgba(124,58,237,0.40);

  /* Neutral palette */
  --color-dark:        #0d1b2a;   /* Near black */
  --color-charcoal:    #1e293b;   /* Dark text */
  --color-slate:       #475569;   /* Secondary text */
  --color-muted:       #94a3b8;   /* Muted / labels */
  --color-border:      #e2e8f0;   /* Dividers */
  --color-surface:     #f8fafc;   /* Off-white panels */
  --color-white:       #ffffff;

  /* Typography */
  --font-display:      'DM Serif Display', Georgia, serif;
  --font-body:         'DM Sans', system-ui, sans-serif;

  /* Spacing scale */
  --space-xs:   4px;
  --space-sm:   8px;
  --space-md:   16px;
  --space-lg:   24px;
  --space-xl:   40px;
  --space-2xl:  64px;
  --space-3xl:  96px;
  --space-4xl:  128px;

  /* Layout */
  --container:  1200px;
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;
  --radius-xl:  24px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:  0 4px 16px rgba(15,39,68,.10), 0 2px 6px rgba(15,39,68,.06);
  --shadow-lg:  0 12px 40px rgba(15,39,68,.14), 0 4px 12px rgba(15,39,68,.08);
  --shadow-teal:0 4px 20px rgba(0,168,150,.25);

  /* Transitions */
  --ease:       cubic-bezier(.4,0,.2,1);
  --duration:   200ms;
}

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

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

body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  color: var(--color-charcoal);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; }

/* ── Container ────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-xl);
}

@media (max-width: 768px) {
  .container { padding-inline: var(--space-md); }
}

/* ── Typography Scale ─────────────────────────────────────── */
.display-xl {
  font-family: var(--font-display);
  font-size: clamp(42px, 5.5vw, 72px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--color-navy);
}

.display-lg {
  font-family: var(--font-display);
  font-size: clamp(34px, 4vw, 54px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-navy);
}

.display-md {
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--color-navy);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-body);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-navy);
}

h1 { font-size: clamp(32px, 3.5vw, 44px); }
h2 { font-size: clamp(28px, 2.5vw, 34px); }
h3 { font-size: clamp(22px, 2vw, 24px); }
h4 { font-size: 18px; }
h5 { font-size: 15px; text-transform: uppercase; letter-spacing: 0.08em; font-weight: 600; }

p { line-height: 1.7; }

.text-lead {
  font-size: clamp(17px, 1.8vw, 20px);
  line-height: 1.6;
  color: var(--color-slate);
  font-weight: 400;
}

.text-sm { font-size: 14px; }
.text-xs { font-size: 12px; letter-spacing: 0.04em; }

.text-teal  { color: var(--color-teal); }
.text-navy  { color: var(--color-navy); }
.text-slate { color: var(--color-slate); }
.text-muted { color: var(--color-muted); }
.text-white { color: var(--color-white); }

.label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-teal);
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 14px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font-body);
  transition: all var(--duration) var(--ease);
  white-space: nowrap;
  line-height: 1;
  cursor: pointer;
}

.btn-primary {
  background: var(--color-teal);
  color: var(--color-white);
  box-shadow: var(--shadow-teal);
}
.btn-primary:hover {
  background: var(--color-teal-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(0,168,150,.35);
}

.btn-outline {
  background: transparent;
  color: var(--color-navy);
  border: 1.5px solid var(--color-navy);
}
.btn-outline:hover {
  background: var(--color-navy);
  color: var(--color-white);
}

.btn-outline-white {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255,255,255,0.5);
}
.btn-outline-white:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--color-white);
}

.btn-ghost {
  background: transparent;
  color: var(--color-teal);
  padding: 14px 0;
  gap: var(--space-xs);
}
.btn-ghost:hover { gap: 10px; }

.btn-lg { padding: 17px 34px; font-size: 16px; }
.btn-sm { padding: 10px 20px; font-size: 13px; }

/* ── Section utilities ────────────────────────────────────── */
.section { padding-block: var(--space-3xl); }
.section-sm { padding-block: var(--space-2xl); }
.section-lg { padding-block: var(--space-4xl); }

.section-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-teal);
  margin-bottom: var(--space-md);
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.5vw, 46px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-navy);
  margin-bottom: var(--space-md);
}

.section-subheading {
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.65;
  color: var(--color-slate);
  max-width: 640px;
}

.centered { text-align: center; }
.centered .section-subheading { margin-inline: auto; }

/* ── Cards ────────────────────────────────────────────────── */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--duration) var(--ease), transform var(--duration) var(--ease);
}
.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* ── Divider ──────────────────────────────────────────────── */
.divider {
  width: 48px;
  height: 3px;
  background: var(--color-teal);
  border-radius: 2px;
  margin-block: var(--space-lg);
}
.divider.centered { margin-inline: auto; }

/* ── Badge / Tag ──────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
}
.badge-teal   { background: var(--color-teal-light); color: var(--color-teal-dark); }
.badge-navy   { background: rgba(15,39,68,.08); color: var(--color-navy); }
.badge-cricos { background: var(--color-cricos-light); color: var(--color-cricos); }
.badge-elicos { background: var(--color-elicos-light); color: var(--color-elicos); }

/* ── Responsive grid helpers ─────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-xl); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-xl); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-xl); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding-block: var(--space-2xl); }
  .section-lg { padding-block: var(--space-3xl); }
}

/* ── Utility ──────────────────────────────────────────────── */
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.italic { font-style: italic; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }