/* ============================================================
   SU Campus — shared styles
   Design tokens + shared nav + shared footer.
   Loaded on every page. Page layout uses Tailwind utilities.
   ============================================================ */

:root{
  --bg:#FAF8F3;          /* warm ivory base */
  --surface:#F1ECE2;     /* warm stone for alternating bands */
  --text:#1B2A22;        /* green-charcoal body text */
  --muted:#5E6A60;
  --navy:#14432E;        /* deep forest green (primary) */
  --navy-deep:#0E3222;   /* darkest green for footer + depth */
  --gold:#C9A24B;        /* muted champagne/brass */
  --gold-soft:#E7D9B4;   /* light gold for subtle tints */
  --line:#E7DFD1;        /* warm hairline on light surfaces */
  --card:#FFFFFF;        /* pure white cards lift off the ivory */

  --radius-sm:8px;
  --radius-card:16px;
  --radius-feature:24px;
  --container:1280px;
  --ease:cubic-bezier(.22,1,.36,1);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
html,body{overflow-x:clip;}        /* stop stray horizontal scroll without breaking position:sticky */
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:'Inter',system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

/* Responsive section padding — replaces fixed 96px so mobile isn't over-spaced */
.sec-pad{padding-top:clamp(52px,9vw,96px);padding-bottom:clamp(52px,9vw,96px);}
h1,h2,h3,h4{font-family:'Poppins',sans-serif;line-height:1.1;margin:0;font-weight:700;}
p,li{line-height:1.6;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}

.container{max-width:var(--container);margin:0 auto;padding-inline:24px;width:100%;}

/* Scroll-reveal (init in script.js) */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .8s var(--ease),transform .8s var(--ease);}
.reveal.in{opacity:1;transform:none;}

/* ---- Buttons ---- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-family:'Poppins',sans-serif;font-weight:600;font-size:16px;
  padding:14px 28px;border-radius:var(--radius-sm);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease),color .3s var(--ease);
  cursor:pointer;border:none;line-height:1;
}
.btn-gold{background:var(--gold);color:var(--navy);}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(201,162,75,.32);}
.btn-outline{background:transparent;color:var(--navy);border:1.5px solid var(--navy);}
.btn-outline:hover{background:var(--navy);color:#fff;}
.btn-ghost-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.35);}
.btn-ghost-light:hover{border-color:var(--gold);color:var(--gold);}

/* ============================================================
   SHARED NAV — identical on every page.
   Only the .active class moves per page.
   ============================================================ */
.site-nav{
  position:sticky;top:0;z-index:50;
  background:var(--navy);
  border-bottom:3px solid var(--gold);
}
.site-nav .nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:84px;
}
.nav-logo{
  display:flex;align-items:center;gap:10px;
  color:#fff;font-family:'Poppins',sans-serif;font-weight:700;
  font-size:17px;letter-spacing:.2px;
}
.nav-logo .logo-mark{
  display:grid;place-items:center;
  width:36px;height:36px;border-radius:8px;
  background:var(--gold);color:var(--navy);flex:none;
}
.nav-logo .logo-mark svg{width:20px;height:20px;}
.nav-logo .logo-sub{display:block;font-size:11px;font-weight:500;color:var(--gold);letter-spacing:.14em;text-transform:uppercase;margin-top:1px;}
.nav-logo img{height:54px;width:auto;display:block;}
@media (max-width:600px){.nav-logo img{height:48px;}}
@media (max-width:380px){.nav-logo img{height:42px;}}

.nav-links{
  display:flex;align-items:center;gap:32px;
  list-style:none;margin:0;padding:0;
}
.nav-links a{
  position:relative;color:#D6E0EF;
  font-size:15px;font-weight:500;padding:6px 0;
  transition:color .3s var(--ease);
}
.nav-links a:hover{color:#fff;}
.nav-links a.active{color:var(--gold);}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:-2px;
  width:0;height:2px;background:var(--gold);
  transition:width .3s var(--ease);
}
.nav-links a:hover::after,.nav-links a.active::after{width:100%;}

.nav-toggle{
  display:none;background:none;border:none;color:#fff;cursor:pointer;padding:8px;
}
.nav-toggle svg{width:26px;height:26px;}

@media (max-width:860px){
  .nav-toggle{display:inline-flex;margin-left:auto;}  /* keep the hamburger pinned right */
  .nav-links{
    position:absolute;top:84px;left:0;right:0;
    flex-direction:column;align-items:flex-start;gap:0;
    background:var(--navy-deep);
    border-bottom:3px solid var(--gold);
    max-height:0;overflow:hidden;
    transition:max-height .4s var(--ease);
  }
  .nav-links.open{max-height:340px;}
  .nav-links li{width:100%;}
  .nav-links a{display:block;width:100%;padding:16px 24px;border-top:1px solid rgba(255,255,255,.08);}
  .nav-links a::after{display:none;}
}

/* ============================================================
   SHARED FOOTER — identical on every page.
   Curved gold divider (reference DNA) + 3 contact emails.
   ============================================================ */
.footer-wave{line-height:0;margin-bottom:-1px;}
.footer-wave svg{display:block;width:100%;height:88px;}

.site-footer{background:var(--navy-deep);color:#C6D2E4;}
.site-footer .footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr;gap:48px;
  padding:64px 0 40px;
}
.site-footer .footer-brand h3{color:#fff;font-size:20px;margin-bottom:12px;}
.footer-logo{height:46px;width:auto;display:block;margin-bottom:18px;}
.site-footer .footer-brand p{color:#9FB1CC;font-size:15px;max-width:38ch;margin:0;}

.footer-contacts h4{
  color:var(--gold);font-size:13px;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;margin-bottom:16px;
}
.footer-contacts ul{list-style:none;margin:0;padding:0;display:grid;gap:12px;}
.footer-contacts li a{
  display:flex;align-items:center;gap:10px;
  color:#D6E0EF;font-size:15px;
  transition:color .3s var(--ease);
}
.footer-contacts li a:hover{color:var(--gold);}
.footer-contacts li a svg{width:18px;height:18px;color:var(--gold);flex:none;}

.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  color:#8DA0BC;font-size:13.5px;
}

@media (max-width:720px){
  .site-footer .footer-grid{grid-template-columns:1fr;gap:36px;padding:48px 0 32px;}
  .footer-bottom{flex-direction:column;text-align:center;}
}

/* ============================================================
   SHARED INTERIOR-PAGE HELPERS (about / programme / faq / contact)
   Home keeps its own page-scoped styles.
   ============================================================ */
.sec-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--navy);font-size:13px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;
}
.sec-eyebrow::before{content:"";width:28px;height:2px;background:var(--gold);display:inline-block;}
.sec-eyebrow.on-dark{color:var(--gold);}
.sec-title{color:var(--navy);font-size:clamp(30px,4vw,42px);margin-top:18px;}
.sec-lead{color:var(--muted);font-size:17px;margin-top:16px;line-height:1.65;}

/* Centered section header — used when there is no second-column content,
   so a header never leaves an empty half beside it. */
.sec-head{max-width:720px;margin-inline:auto;text-align:center;}

/* Navy page header, shared shell; each page fills its own content */
.page-hero{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(158deg,#0E3222 0%,#14432E 62%,#113A27 100%);
}
.page-hero::before{
  content:"";position:absolute;top:-160px;right:-120px;
  width:520px;height:520px;border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,rgba(201,162,75,.20),rgba(201,162,75,0) 70%);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:24px 24px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 80%);
          mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 80%);
}
.page-hero .ph-inner{position:relative;z-index:1;padding-top:clamp(56px,8vw,92px);padding-bottom:clamp(56px,8vw,92px);}
.page-hero .ph-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;}
@media (max-width:920px){.page-hero .ph-grid{grid-template-columns:1fr;gap:32px;}}
.page-hero .ph-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--gold);font-size:13px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;
}
.page-hero .ph-eyebrow::before{content:"";width:28px;height:2px;background:var(--gold);display:inline-block;}
.page-hero h1{font-size:clamp(30px,4.6vw,48px);letter-spacing:-.01em;margin-top:18px;}
.page-hero h1 .accent{color:var(--gold);}
.page-hero .ph-lead{color:#C3D2C6;font-size:clamp(16px,1.3vw,18px);max-width:52ch;margin-top:20px;}

/* Right-hand supporting card in the interior hero — fills the space, no empty sides */
.ph-card{
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.14);
  border-top:3px solid var(--gold);
  border-radius:var(--radius-feature);
  padding:30px;
}
.ph-card .pc-head{display:flex;align-items:center;gap:10px;color:var(--gold);font-family:'Poppins',sans-serif;font-weight:600;font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;}
.ph-card .pc-head svg{width:18px;height:18px;}
.ph-card ul{list-style:none;margin:22px 0 0;padding:0;display:grid;gap:16px;}
.ph-card li{display:flex;align-items:flex-start;gap:13px;}
.ph-card li .ico{width:38px;height:38px;border-radius:10px;flex:none;background:rgba(201,162,75,.14);color:var(--gold);display:grid;place-items:center;}
.ph-card li .ico svg{width:18px;height:18px;}
.ph-card li .txt b{display:block;color:#fff;font-family:'Poppins',sans-serif;font-weight:600;font-size:14.5px;}
.ph-card li .txt span{display:block;color:#A7BBAC;font-size:13px;margin-top:2px;}

/* ============================================================
   MOBILE REFINEMENTS — apply only at <=640px. Desktop untouched.
   ============================================================ */
@media (max-width:640px){
  .container{padding-inline:18px;}

  /* Interior hero card + spacing */
  .page-hero .ph-inner{padding-top:44px;padding-bottom:44px;}
  .page-hero .ph-card{padding:22px;}
  .page-hero .ph-card ul{gap:14px;margin-top:18px;}
  .page-hero h1{margin-top:14px;}
  .page-hero .ph-lead{margin-top:16px;}

  /* Comfortable full-width buttons for tapping */
  .btn{width:100%;justify-content:center;padding:15px 22px;}

  /* Footer stacks its emails a little tighter */
  .footer-contacts li a{font-size:14.5px;word-break:break-word;}
}