/* ==========================================================================
   AI Campus Opportunity Agent — stylesheet (styles.css)
   Order: variables -> base -> nav -> buttons -> hero -> sections ->
          demo dashboard -> footer -> toast -> responsive media queries.
   Every class below matches a class used in index.html.
   ========================================================================== */

/* ---------- 1. DESIGN TOKENS (CSS variables used everywhere) ---------- */
*{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#070b16;--bg2:#0b1122;--card:#111a30;--card2:#0e1530;--line:#1f2a4d;--txt:#e8edf7;--mut:#9aa7c4;--vio:#8b5cf6;--vio2:#6d28d9;--pink:#ec4899;--blue:#38bdf8;--green:#22c55e;--red:#ef4444;--amber:#f59e0b}

/* ---------- 2. BASE ---------- */
html{scroll-behavior:smooth} /* makes every nav "tab" glide instead of jumping */
body{background:var(--bg);color:var(--txt);font-family:Inter,system-ui,sans-serif;line-height:1.55}
/* When a nav tab scrolls to a section, stop 76px early so the sticky navbar
   never covers the section title. */
section[id],header[id]{scroll-margin-top:76px}
.container{max-width:1200px;margin:0 auto;padding:0 22px}
h1,h2,h3,h4{font-family:Sora,Inter,sans-serif}
.grad{background:linear-gradient(90deg,var(--vio),var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent}
:focus-visible{outline:2px solid var(--vio);outline-offset:2px} /* keyboard accessibility */

/* ---------- 3. NAV (sticky top bar = the site's "tabs") ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(7,11,22,.85);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:1200px;margin:0 auto;padding:12px 22px;display:flex;align-items:center;gap:22px}
.brand{font-weight:800;font-size:19px;text-decoration:none;color:#fff}.brand span{color:var(--vio)}.brand-dot{display:inline-block;width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--vio),var(--pink));margin-right:8px}
.nav-links{display:flex;gap:16px;margin-left:auto}.nav-links a{color:var(--mut);text-decoration:none;font-size:14px}.nav-links a:hover{color:#fff}
.nav-links a.active{color:#fff;text-shadow:0 0 12px rgba(139,92,246,.8)} /* current tab, set by scrollspy in app.js */

/* Hamburger button — hidden on desktop, shown by the media query at the bottom */
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:4px;width:40px;height:36px;margin-left:auto;background:none;border:1px solid var(--line);border-radius:9px;cursor:pointer;padding:0 9px}
.nav-toggle span{display:block;height:2px;width:100%;background:var(--txt);border-radius:2px;transition:.2s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- 4. BUTTONS ---------- */
.btn{display:inline-block;padding:12px 22px;border-radius:12px;font-weight:700;text-decoration:none;border:1px solid transparent;cursor:pointer;font-size:15px}
.btn-primary{background:linear-gradient(135deg,var(--vio2),var(--vio),var(--pink));color:#fff;box-shadow:0 8px 24px rgba(139,92,246,.35)}
.btn-primary:hover{filter:brightness(1.1)}
.btn-ghost{border-color:var(--line);color:var(--txt);background:rgba(255,255,255,.04)}
.btn-sm{padding:8px 14px;font-size:13px;border-radius:10px}

/* ---------- 5. HERO ---------- */
.hero{position:relative;overflow:hidden;padding:56px 0 70px;border-bottom:1px solid var(--line)}
.hero-bg{position:absolute;inset:0;background:radial-gradient(600px 300px at 20% 10%,rgba(139,92,246,.25),transparent),radial-gradient(500px 300px at 80% 20%,rgba(236,72,153,.18),transparent),radial-gradient(700px 400px at 50% 100%,rgba(56,189,248,.12),transparent)}
.hero-grid{position:relative;display:grid;grid-template-columns:1fr 1.1fr;gap:36px;align-items:start}
.pill{display:inline-block;background:rgba(139,92,246,.18);border:1px solid var(--vio);color:#c4b5fd;font-weight:800;font-size:12px;letter-spacing:1px;padding:5px 12px;border-radius:8px;margin-bottom:12px}
.hero h1{font-size:56px;line-height:1.02;font-weight:900;letter-spacing:-1px}
.hero-sub{color:var(--mut);margin:14px 0 18px;max-width:440px}
.what h3{color:var(--vio);font-size:13px;letter-spacing:1.5px;margin-bottom:10px}
.what ul{list-style:none;display:grid;gap:8px;font-size:14px;color:#cfd7ec}
.what i{color:var(--vio);font-style:normal;font-weight:800;margin-right:8px}
.hero-cta{display:flex;gap:12px;margin:20px 0;flex-wrap:wrap}
.college-strip{background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:12px;padding:10px 14px;font-size:12px;color:var(--mut);display:grid;gap:2px}.college-strip strong{color:#fff;font-size:13px}
/* hero right mockups (laptop / notification / phone / to-do note) */
.hero-right{position:relative;min-height:560px}
.laptop{background:#0d1328;border:1px solid var(--line);border-radius:16px;padding:14px;box-shadow:0 30px 60px rgba(0,0,0,.5)}
.laptop-screen{background:#101a36;border-radius:10px;padding:14px}
.dash-head{display:flex;justify-content:space-between;font-size:13px;margin-bottom:12px}.dash-logo{color:var(--blue);font-weight:800}.dash-hello{color:var(--amber)}
.dash-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:12px}
.stat{background:#0b1230;border:1px solid var(--line);border-radius:10px;padding:8px;text-align:center}.stat small{display:block;color:var(--mut);font-size:10px}.stat b{font-size:20px}.stat.accent b{color:var(--green)}
.dash-title{font-size:13px;color:#fff;margin-bottom:8px}
.opp{display:flex;align-items:center;gap:10px;background:#0b1230;border:1px solid var(--line);border-radius:10px;padding:8px;margin-bottom:8px;font-size:12px}.opp small{color:var(--mut);display:block}.opp em{margin-left:auto;background:rgba(139,92,246,.2);color:#c4b5fd;font-style:normal;font-size:11px;padding:4px 10px;border-radius:8px}
.opp-ic{font-size:20px}
.laptop-base{height:10px;background:linear-gradient(90deg,#1e293b,#334155);border-radius:0 0 12px 12px;margin:10px -14px -14px}
.toast-card{position:absolute;left:-30px;top:46%;background:#fff;color:#111;border-radius:14px;padding:12px 14px;width:250px;font-size:13px;box-shadow:0 20px 50px rgba(0,0,0,.5);animation:float 4s ease-in-out infinite}
.toast-card b{font-size:11px;color:#333}.toast-card b span{color:#999;font-weight:400;margin-left:6px}
.phone{position:absolute;right:0;top:38%;width:220px;background:#0d1428;border:1px solid var(--line);border-radius:18px;padding:14px;font-size:12px;box-shadow:0 20px 50px rgba(0,0,0,.5)}
.phone b{display:block;margin-bottom:10px}.dl{display:flex;justify-content:space-between;background:#111c3a;border-radius:10px;padding:8px;margin-bottom:8px}.dl small{color:var(--mut)}.dl em{color:var(--amber);font-style:normal;font-size:11px}
.todo-note{position:absolute;left:10px;bottom:-10px;background:#f5f1e6;color:#333;border-radius:12px;padding:14px;width:230px;font-size:13px;transform:rotate(-3deg);box-shadow:0 16px 40px rgba(0,0,0,.5)}
.todo-note b{font-family:cursive;font-size:18px;display:block;margin-bottom:6px}.todo-note label{display:block;margin:4px 0}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

/* ---------- 6. GENERIC SECTIONS ---------- */
section{padding:60px 0}
.alt{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-title{text-align:center;color:var(--vio);letter-spacing:2px;font-size:22px;margin-bottom:6px}
.sec-sub{text-align:center;color:var(--mut);margin-bottom:28px}
.split-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.ps-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px}
.ps-card h3{margin-bottom:10px;letter-spacing:1px}.badge{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:50%;font-weight:800;margin-right:8px}.red{background:var(--red)}.green{background:var(--green)}
.ps-card p{color:#c9d3e9;font-size:14px}
.mini-tags{list-style:none;margin-top:14px;display:grid;gap:10px}.mini-tags li{background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:10px;padding:10px;font-size:13px}.mini-tags b{display:block}.mini-tags span{color:var(--mut)}
.flow-mini{margin-top:14px;background:rgba(34,197,94,.08);border:1px solid rgba(34,197,94,.3);border-radius:10px;padding:10px;font-size:12px;color:#bbf7d0}
/* features */
.feat-row{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
.feat{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 14px;text-align:center;transition:.2s}.feat:hover{transform:translateY(-4px);border-color:var(--vio)}
.feat h4{font-size:13px;margin:8px 0 6px}.feat p{font-size:12px;color:var(--mut)}
.fic{font-size:26px}
/* aim */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:28px}
.sec-no{background:rgba(139,92,246,.15);color:var(--vio);display:inline-block;font-weight:800;border-radius:8px;padding:2px 10px;margin-bottom:10px}
.card h2{font-size:24px;margin-bottom:8px}.lead{color:#c9d3e9;margin-bottom:14px}
.check{list-style:none;display:grid;gap:10px;font-size:14px}.check li{background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:10px;padding:10px 12px}.check li::before{content:"✓ ";color:var(--green);font-weight:800}
.obj-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.obj{background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:12px;padding:14px;font-size:13px}.obj b{display:block;margin-bottom:4px;color:#fff}.obj span{color:var(--mut)}
/* steps */
.steps{display:flex;align-items:stretch;gap:10px;justify-content:center;margin:26px 0}
.step{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;text-align:center;flex:1}.step .n{background:linear-gradient(135deg,var(--vio),var(--pink));width:32px;height:32px;display:inline-grid;place-items:center;border-radius:50%;font-weight:800;margin-bottom:8px}.step p{color:var(--mut);font-size:13px}
.arrow{align-self:center;color:var(--vio);font-size:24px;font-weight:800}
.pipeline{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-top:10px}
.pipeline span{background:rgba(56,189,248,.06);border:1px solid rgba(56,189,248,.25);border-radius:12px;padding:12px;font-size:13px;text-align:center}.pipeline small{display:block;color:var(--mut);font-size:11px;margin-top:4px}

/* ---------- 7. LIVE DEMO DASHBOARD ---------- */
.demo-grid{display:grid;grid-template-columns:.9fr 1.2fr .9fr;gap:16px}
.card label{display:block;font-size:13px;color:var(--mut);margin:12px 0}
.card input,.card select{width:100%;margin-top:6px;background:#0b1230;border:1px solid var(--line);color:#fff;border-radius:10px;padding:10px;font-size:14px}
.card h3{font-size:17px}.count{background:var(--vio);border-radius:20px;font-size:12px;padding:2px 10px;margin-left:6px}
.filters{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}
.filters button{background:#0b1230;border:1px solid var(--line);color:var(--mut);border-radius:20px;padding:6px 14px;cursor:pointer;font-size:12px}
.filters button.active{background:var(--vio);color:#fff;border-color:var(--vio)}
.opp-list{display:grid;gap:10px;max-height:460px;overflow:auto}
.opp-card{background:#0b1230;border:1px solid var(--line);border-radius:12px;padding:14px}
.opp-card h4{font-size:14px}.opp-card .meta{font-size:12px;color:var(--mut);margin:4px 0 8px}
.opp-card .row{display:flex;gap:8px;align-items:center;justify-content:space-between}
.tag{font-size:11px;background:rgba(139,92,246,.2);color:#c4b5fd;padding:3px 10px;border-radius:20px}
.match{font-size:11px;color:var(--green);font-weight:700}
.reminder-box{margin-top:18px;background:rgba(245,158,11,.07);border:1px solid rgba(245,158,11,.3);border-radius:12px;padding:14px;font-size:13px}
.saved-list{display:grid;gap:8px;margin:12px 0;font-size:13px}
.saved-item{background:#0b1230;border:1px solid var(--line);border-radius:10px;padding:10px;display:flex;justify-content:space-between;align-items:center}
.saved-item button{background:none;border:none;color:var(--red);cursor:pointer}
.muted{color:var(--mut);font-size:13px}.mt{margin-top:14px}
.todo-row{display:flex;gap:8px}.todo-row input{flex:1}
#todoList{list-style:none;margin-top:10px;display:grid;gap:6px;font-size:13px}
#todoList li{background:#0b1230;border:1px solid var(--line);border-radius:8px;padding:8px 10px;display:flex;gap:8px;align-items:center}
#todoList li.done span{text-decoration:line-through;color:var(--mut)}
#todoList button{margin-left:auto;background:none;border:none;color:var(--red);cursor:pointer}
/* tech */
.tech-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.tech{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px}.tech b{display:block;margin-bottom:6px}.tech span{color:var(--mut);font-size:13px}
/* innov */
.innov-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.innov{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px 14px;text-align:center}.innov h4{font-size:13px;margin:8px 0}.innov p{font-size:12px;color:var(--mut)}
.banner{margin-top:22px;background:linear-gradient(135deg,var(--vio2),var(--vio),var(--pink));border-radius:14px;padding:18px;text-align:center;font-weight:800;font-size:18px}.banner span{display:block;font-weight:400;font-size:13px;opacity:.9}
/* future */
.future-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.future{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px}.future b{display:block;margin-bottom:6px}.future span{color:var(--mut);font-size:13px}

/* ---------- 8. FOOTER + TOAST ---------- */
footer{border-top:1px solid var(--line);padding:26px 0;background:#05080f}
.foot{display:flex;justify-content:space-between;gap:16px;align-items:center}.foot span{display:block;color:var(--mut);font-size:12px}.foot .right{text-align:right;display:grid;gap:8px;justify-items:end}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(80px);background:#fff;color:#111;padding:12px 20px;border-radius:12px;font-size:14px;font-weight:600;opacity:0;transition:.3s;z-index:99;box-shadow:0 16px 40px rgba(0,0,0,.5);max-width:90vw;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- 9. RESPONSIVE ---------- */
/* Tablets / small laptops: nav becomes a hamburger dropdown and the hero
   mockups stack vertically instead of overlapping. */
@media(max-width:1000px){
  .nav-toggle{display:flex}
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;margin-left:0;flex-direction:column;gap:2px;padding:12px 22px 16px;background:rgba(7,11,22,.97);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
  .nav-links.open{display:flex}
  .nav-links a{padding:10px 10px;border-radius:8px;font-size:15px}
  .nav-links a:hover{background:rgba(255,255,255,.05)}
  .hero-grid,.split-grid,.two-col,.demo-grid{grid-template-columns:1fr}
  .feat-row,.innov-grid{grid-template-columns:repeat(2,1fr)}
  .tech-grid,.future-grid,.pipeline{grid-template-columns:1fr 1fr}
  .steps{flex-direction:column}.arrow{transform:rotate(90deg);align-self:center}
  .hero h1{font-size:42px}
  /* hero mockups: flow normally (no absolute positioning = no overlap) */
  .hero-right{min-height:auto;display:grid;gap:16px;justify-items:center}
  .toast-card{position:static;left:auto;width:auto;max-width:340px;animation:none}
  .phone{position:static;width:100%;max-width:340px}
  .todo-note{position:static;width:100%;max-width:300px;transform:rotate(-1.5deg)}
}
/* Phones: tighten type & grids further */
@media(max-width:560px){
  .hero{padding:40px 0 56px}
  .hero h1{font-size:34px}
  .feat-row{grid-template-columns:repeat(2,1fr)}
  .innov-grid,.tech-grid,.future-grid,.pipeline,.obj-grid{grid-template-columns:1fr}
  .dash-stats{grid-template-columns:repeat(2,1fr)}
  .card{padding:20px}
  .foot{flex-direction:column;text-align:center}.foot .right{justify-items:center;text-align:center}
}
/* Respect users who turn off animations in their OS settings */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation:none!important;transition:none!important}
}