/* ============== DESIGN TOKENS ============== */
:root {
  /* Type scale */
  --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, 4.5rem);

  /* 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 / transitions / shadows */
  --radius-sm: 0.375rem; --radius-md: 0.5rem; --radius-lg: 0.75rem; --radius-xl: 1rem; --radius-full: 9999px;
  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);
  --content-narrow: 680px; --content-default: 1000px; --content-wide: 1240px;

  /* Fonts */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
}

/* LIGHT (default) */
:root, [data-theme='light'] {
  --color-bg: #ffffff;
  --color-surface: #f7f9fc;
  --color-surface-2: #eef2f8;
  --color-surface-navy: #002766;
  --color-border: #dce3ee;
  --color-divider: #e8edf5;

  --color-text: #0d1b2f;
  --color-text-muted: #4a5a72;
  --color-text-faint: #8a98ac;
  --color-text-inverse: #ffffff;

  --color-primary: #004aad;        /* brand blue */
  --color-primary-hover: #003a89;
  --color-primary-active: #002c69;
  --color-primary-soft: #e6eefa;

  --color-gold: #c69a1f;           /* brand gold (accessible) */
  --color-gold-bright: #d4af36;
  --color-gold-soft: #f6efd8;

  --shadow-sm: 0 1px 2px rgba(13,27,47,0.06);
  --shadow-md: 0 6px 20px rgba(13,27,47,0.08);
  --shadow-lg: 0 18px 48px rgba(13,27,47,0.14);
  --shadow-navy: 0 18px 48px rgba(0,40,102,0.28);
}

/* DARK */
[data-theme='dark'] {
  --color-bg: #0a1424;
  --color-surface: #0f1d33;
  --color-surface-2: #14253f;
  --color-surface-navy: #0c1c34;
  --color-border: #243752;
  --color-divider: #1b2c45;

  --color-text: #e8eef6;
  --color-text-muted: #9fb0c6;
  --color-text-faint: #687a93;
  --color-text-inverse: #0a1424;

  --color-primary: #4f8fe0;
  --color-primary-hover: #6ba2e8;
  --color-primary-active: #3a78c9;
  --color-primary-soft: #15294a;

  --color-gold: #d4af36;
  --color-gold-bright: #e3c24f;
  --color-gold-soft: #2a2616;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 6px 20px rgba(0,0,0,0.45);
  --shadow-lg: 0 18px 48px rgba(0,0,0,0.55);
  --shadow-navy: 0 18px 48px rgba(0,0,0,0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0a1424; --color-surface: #0f1d33; --color-surface-2: #14253f;
    --color-surface-navy: #0c1c34; --color-border: #243752; --color-divider: #1b2c45;
    --color-text: #e8eef6; --color-text-muted: #9fb0c6; --color-text-faint: #687a93;
    --color-text-inverse: #0a1424; --color-primary: #4f8fe0; --color-primary-hover: #6ba2e8;
    --color-primary-active: #3a78c9; --color-primary-soft: #15294a; --color-gold: #d4af36;
    --color-gold-bright: #e3c24f; --color-gold-soft: #2a2616;
  }
}

/* ============== BASE ============== */
*, *::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: 5rem;
}
body {
  min-height: 100dvh; line-height: 1.65; font-family: var(--font-body);
  font-size: var(--text-base); color: var(--color-text); background: var(--color-bg);
  transition: background 300ms ease, color 300ms ease;
}
img, svg { display: block; max-width: 100%; height: auto; }
ul[role='list'] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1,h2,h3,h4 { text-wrap: balance; line-height: 1.15; font-family: var(--font-display); font-weight: 700; }
p { text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; background: none; border: none; }
::selection { background: rgba(0,74,173,0.18); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }
.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; }
a, button, input, textarea, select {
  transition: color var(--transition-interactive), background var(--transition-interactive),
    border-color var(--transition-interactive), box-shadow var(--transition-interactive),
    transform var(--transition-interactive);
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration:.01ms!important; transition-duration:.01ms!important; scroll-behavior:auto!important; }
}

/* ============== LAYOUT ============== */
.wrap { width: 100%; max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-6); }
.narrow { max-width: var(--content-narrow); }
section { padding-block: clamp(var(--space-16), 8vw, var(--space-32)); }
.eyebrow {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-size: var(--text-xs); font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--color-primary);
}
[data-theme='dark'] .eyebrow { color: var(--color-gold); }
.eyebrow::before { content:''; width: 28px; height: 2px; background: var(--color-gold); }
.section-title { font-size: var(--text-xl); margin-top: var(--space-3); letter-spacing: -0.01em; }
.section-lead { color: var(--color-text-muted); margin-top: var(--space-4); max-width: 60ch; font-size: var(--text-lg); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  padding: var(--space-3) var(--space-6); border-radius: var(--radius-md);
  font-size: var(--text-sm); font-weight: 600; letter-spacing: 0.01em; white-space: nowrap;
}
.btn-primary { background: var(--color-primary); color: #fff; box-shadow: var(--shadow-md); }
.btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-gold { background: var(--color-gold); color: #1a1400; }
.btn-gold:hover { background: var(--color-gold-bright); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-outline { border: 1.5px solid var(--color-border); color: var(--color-text); background: var(--color-bg); }
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); transform: translateY(-2px); }
.btn-ghost-light { border: 1.5px solid rgba(255,255,255,0.32); color: #fff; }
.btn-ghost-light:hover { background: rgba(255,255,255,0.12); transform: translateY(-2px); }

/* ============== HEADER ============== */
.header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent; transition: box-shadow .3s ease, border-color .3s ease;
}
.header.scrolled { box-shadow: var(--shadow-sm); border-bottom-color: var(--color-divider); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: var(--space-3); }
.brand-badge { display: grid; place-items: center; width: 46px; height: 46px; border-radius: var(--radius-md); background: var(--color-surface-navy); flex: none; box-shadow: var(--shadow-sm); }
.brand-badge img { width: 34px; height: auto; }
.footer .brand-badge { background: rgba(255,255,255,0.06); }
.brand-name { font-family: var(--font-display); font-weight: 700; font-size: var(--text-base); letter-spacing: -0.01em; line-height: 1.1; }
.brand-name span { display: block; font-family: var(--font-body); font-size: 0.62rem; font-weight: 600; letter-spacing: 0.18em; color: var(--color-text-faint); text-transform: uppercase; }
.nav { display: flex; align-items: center; gap: var(--space-8); }
.nav-links { display: flex; gap: var(--space-6); }
.nav-links a { font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted); }
.nav-links a:hover { color: var(--color-primary); }
.nav-actions { display: flex; align-items: center; gap: var(--space-3); }
.theme-toggle { display: grid; place-items: center; width: 40px; height: 40px; border-radius: var(--radius-md); color: var(--color-text-muted); border: 1px solid var(--color-border); }
.theme-toggle:hover { color: var(--color-primary); border-color: var(--color-primary); }
.menu-btn { display: none; width: 40px; height: 40px; place-items: center; border-radius: var(--radius-md); border: 1px solid var(--color-border); color: var(--color-text); }

/* ============== HERO ============== */
.hero { position: relative; overflow: hidden; background: var(--color-surface-navy); color: #fff; padding-block: clamp(var(--space-24), 12vw, 9rem); }
.hero::before {
  content:''; position:absolute; inset:0;
  background-image: linear-gradient(100deg, rgba(0,30,80,0.94) 0%, rgba(0,30,80,0.6) 42%, rgba(0,30,80,0.15) 75%), url('assets/hero-bg.png');
  background-size: cover; background-position: center right; z-index: 0;
}
.hero-inner { position: relative; z-index: 1; max-width: 640px; }
.hero .eyebrow { color: var(--color-gold-bright); }
.hero .eyebrow::before { background: var(--color-gold-bright); }
.hero h1 { font-size: var(--text-3xl); color: #fff; letter-spacing: -0.02em; margin-top: var(--space-4); }
.hero h1 .accent { color: var(--color-gold-bright); font-style: italic; }
.hero-sub { font-size: var(--text-lg); color: rgba(255,255,255,0.82); margin-top: var(--space-5); max-width: 52ch; }
.hero-cta { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-top: var(--space-8); }
.hero-trust { display: flex; flex-wrap: wrap; gap: var(--space-6); margin-top: var(--space-10); padding-top: var(--space-6); border-top: 1px solid rgba(255,255,255,0.16); }
.hero-trust div { font-size: var(--text-sm); color: rgba(255,255,255,0.7); }
.hero-trust strong { display: block; font-family: var(--font-display); font-size: var(--text-xl); color: var(--color-gold-bright); font-weight: 700; }

/* ============== RISK STRIP ============== */
.risk-strip { background: var(--color-surface-2); border-block: 1px solid var(--color-divider); }
.risk-strip .wrap { padding-block: var(--space-4); }
.risk-strip p { font-size: var(--text-xs); color: var(--color-text-muted); text-align: center; max-width: 90ch; margin-inline: auto; }

/* ============== ABOUT ============== */
.about-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: clamp(var(--space-8), 5vw, var(--space-20)); align-items: center; }
.about-copy p { color: var(--color-text-muted); margin-top: var(--space-5); }
.about-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-8); box-shadow: var(--shadow-md); }
.about-card h3 { font-family: var(--font-body); font-size: var(--text-base); font-weight: 700; }
.value-list { list-style: none; margin-top: var(--space-4); display: grid; gap: var(--space-4); }
.value-list li { display: flex; gap: var(--space-3); font-size: var(--text-sm); color: var(--color-text-muted); }
.value-list .ic { flex: none; width: 26px; height: 26px; border-radius: var(--radius-full); background: var(--color-primary-soft); color: var(--color-primary); display: grid; place-items: center; }

/* ============== APPROACH / FEATURES ============== */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); margin-top: var(--space-12); }
.feature-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-8); transition: transform var(--transition-interactive), box-shadow var(--transition-interactive), border-color var(--transition-interactive); }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--color-primary); }
.feature-icon { width: 48px; height: 48px; border-radius: var(--radius-md); background: linear-gradient(135deg, var(--color-primary), var(--color-primary-active)); color: #fff; display: grid; place-items: center; margin-bottom: var(--space-5); }
.feature-card h3 { font-family: var(--font-body); font-size: var(--text-lg); font-weight: 700; }
.feature-card p { color: var(--color-text-muted); margin-top: var(--space-3); font-size: var(--text-sm); }

/* ============== PROGRAMMES ============== */
.programmes { background: var(--color-surface); }
.prog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); margin-top: var(--space-12); }
.prog-card { position: relative; background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-8); display: flex; flex-direction: column; transition: transform var(--transition-interactive), box-shadow var(--transition-interactive); }
.prog-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.prog-card.featured { border-color: var(--color-primary); box-shadow: var(--shadow-navy); }
.prog-tag { position: absolute; top: -12px; left: var(--space-8); background: var(--color-gold); color: #1a1400; font-size: var(--text-xs); font-weight: 700; padding: var(--space-1) var(--space-3); border-radius: var(--radius-full); letter-spacing: 0.04em; }
.prog-level { font-size: var(--text-xs); font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-primary); }
.prog-card h3 { font-size: var(--text-lg); font-family: var(--font-body); font-weight: 700; margin-top: var(--space-2); }
.prog-card > p { color: var(--color-text-muted); font-size: var(--text-sm); margin-top: var(--space-3); }
.prog-features { list-style: none; margin: var(--space-6) 0; display: grid; gap: var(--space-3); flex: 1; }
.prog-features li { display: flex; gap: var(--space-2); font-size: var(--text-sm); color: var(--color-text-muted); }
.prog-features svg { flex: none; color: var(--color-gold); margin-top: 3px; }
.prog-card .btn { width: 100%; }

/* ============== CTA BANNER ============== */
.cta-banner { background: var(--color-surface-navy); color: #fff; text-align: center; }
.cta-banner h2 { font-size: var(--text-2xl); color: #fff; }
.cta-banner p { color: rgba(255,255,255,0.8); margin-top: var(--space-4); max-width: 56ch; margin-inline: auto; }
.cta-banner .hero-cta { justify-content: center; }

/* ============== CONTACT ============== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(var(--space-8), 5vw, var(--space-16)); align-items: start; }
.contact-methods { display: grid; gap: var(--space-4); margin-top: var(--space-8); }
.contact-method { display: flex; gap: var(--space-4); align-items: center; padding: var(--space-4) var(--space-5); border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-surface); transition: border-color var(--transition-interactive), transform var(--transition-interactive); }
.contact-method:hover { border-color: var(--color-primary); transform: translateX(4px); }
.contact-method .ic { flex:none; width: 44px; height: 44px; border-radius: var(--radius-md); background: var(--color-primary-soft); color: var(--color-primary); display: grid; place-items: center; }
.contact-method .lbl { font-size: var(--text-xs); color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.08em; }
.contact-method .val { font-weight: 600; font-size: var(--text-sm); }

.form { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: clamp(var(--space-6), 4vw, var(--space-10)); box-shadow: var(--shadow-md); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.field { margin-bottom: var(--space-5); }
.field label { display: block; font-size: var(--text-sm); font-weight: 600; margin-bottom: var(--space-2); }
.field input, .field select, .field textarea {
  width: 100%; padding: var(--space-3) var(--space-4); border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md); background: var(--color-bg); font-size: var(--text-sm);
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--color-primary); outline: none; box-shadow: 0 0 0 3px var(--color-primary-soft); }
.field textarea { resize: vertical; min-height: 110px; }
.form .btn { width: 100%; margin-top: var(--space-2); }
.form-note { font-size: var(--text-xs); color: var(--color-text-faint); margin-top: var(--space-4); text-align: center; }
.form-success { display: none; text-align: center; padding: var(--space-8) 0; }
.form-success.show { display: block; }
.form-success svg { margin: 0 auto var(--space-4); color: var(--color-gold); }
.form-success h3 { font-family: var(--font-body); font-size: var(--text-lg); }
.form-success p { color: var(--color-text-muted); margin-top: var(--space-2); font-size: var(--text-sm); }

/* ============== FOOTER ============== */
.footer { background: var(--color-surface-navy); color: rgba(255,255,255,0.7); padding-block: var(--space-16) var(--space-8); }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: var(--space-10); }
.footer .brand-name, .footer .brand-name span { color: #fff; }
.footer-about { font-size: var(--text-sm); margin-top: var(--space-4); max-width: 36ch; color: rgba(255,255,255,0.62); }
.footer h4 { font-family: var(--font-body); font-size: var(--text-sm); color: #fff; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: var(--space-4); }
.footer ul { list-style: none; display: grid; gap: var(--space-3); }
.footer ul a { font-size: var(--text-sm); color: rgba(255,255,255,0.7); }
.footer ul a:hover { color: var(--color-gold-bright); }
.footer-bottom { margin-top: var(--space-12); padding-top: var(--space-6); border-top: 1px solid rgba(255,255,255,0.14); display: flex; flex-wrap: wrap; gap: var(--space-4); justify-content: space-between; font-size: var(--text-xs); color: rgba(255,255,255,0.5); }
.footer-risk { font-size: var(--text-xs); color: rgba(255,255,255,0.45); margin-top: var(--space-6); max-width: 100%; line-height: 1.6; }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s cubic-bezier(0.16,1,0.3,1), transform .7s cubic-bezier(0.16,1,0.3,1); }
.reveal.in { opacity: 1; transform: none; }

/* ============== RESPONSIVE ============== */
@media (max-width: 900px) {
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .feature-grid, .prog-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: var(--space-8); }
}
@media (max-width: 720px) {
  .nav-links { display: none; }
  .menu-btn { display: grid; }
  .nav-links.open { display: flex; position: absolute; top: 72px; left: 0; right: 0; flex-direction: column; background: var(--color-bg); padding: var(--space-4) var(--space-6); border-bottom: 1px solid var(--color-divider); box-shadow: var(--shadow-md); }
  .form-row { grid-template-columns: 1fr; }
  .hero-trust { gap: var(--space-4); }
}