/* =====================================================
   K.N. University — Project Portal
   Palette drawn from the university crest:
   navy #1B2653 · gold #F2B705 · white · ink #10163A
   ===================================================== */
:root{
  --navy:#1B2653;
  --navy-deep:#131C40;
  --gold:#F2B705;
  --gold-soft:#FCE9A8;
  --ink:#10163A;
  --muted:#5A6285;
  --mist:#F4F6FB;
  --line:#E3E7F2;
  --white:#FFFFFF;
  --danger:#C0392B;
  --radius:14px;
  --shadow:0 8px 28px rgba(19,28,64,.10);
  --font-display:'Marcellus', Georgia, serif;
  --font-body:'Manrope', system-ui, -apple-system, sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-body);
  background:var(--white);
  color:var(--ink);
  min-height:100vh;
  line-height:1.5;
}
.hidden{display:none !important}
img{max-width:100%}
a{color:var(--navy)}

/* ---------- Signature: the crest's double gold rule ---------- */
.gold-rule{
  height:8px;
  margin:14px auto 18px;
  width:180px;
  border-top:2px solid var(--gold);
  border-bottom:2px solid var(--gold);
}
.gold-rule.slim{width:100%;height:5px;margin:0;border-top-width:1.5px;border-bottom-width:1.5px}

/* =====================================================
   AUTH SCREEN
   ===================================================== */
.auth-screen{
  min-height:100vh;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  padding:24px 16px calc(24px + env(safe-area-inset-bottom));
  background:
    radial-gradient(circle at 85% 8%, rgba(242,183,5,.10), transparent 45%),
    radial-gradient(circle at 10% 95%, rgba(27,38,83,.07), transparent 45%),
    var(--white);
}
.auth-card{
  width:100%;
  max-width:420px;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:20px;
  box-shadow:var(--shadow);
  padding:28px 22px 26px;
  text-align:center;
}
.logo-box{
  background:var(--white);          /* white logo background, as requested */
  display:inline-flex;
  padding:6px 18px;
  border-radius:16px;
}
.auth-logo{height:150px;width:auto}
.auth-title{
  font-family:var(--font-display);
  font-size:1.7rem;
  letter-spacing:.06em;
  color:var(--navy);
}
.auth-sub{color:var(--muted);font-size:.92rem;margin:4px 0 20px}
.auth-form{text-align:left}
.auth-switch{text-align:center;font-size:.9rem;color:var(--muted);margin-top:16px}
.auth-switch a{font-weight:700}
.auth-footer{margin-top:22px;color:var(--muted);font-size:.8rem;letter-spacing:.08em;text-transform:uppercase}

/* ---------- Fields ---------- */
.field{display:block;margin-bottom:14px}
.field>span{
  display:block;
  font-size:.8rem;
  font-weight:700;
  letter-spacing:.04em;
  text-transform:uppercase;
  color:var(--navy);
  margin-bottom:6px;
}
.field input{
  width:100%;
  font:inherit;
  padding:12px 14px;
  border:1.5px solid var(--line);
  border-radius:12px;
  background:var(--mist);
  color:var(--ink);
  outline:none;
  transition:border-color .15s, background .15s;
}
.field input:focus{border-color:var(--navy);background:var(--white)}
.pw-wrap{position:relative}
.pw-wrap input{padding-right:44px}
.pw-eye{
  position:absolute;right:6px;top:50%;transform:translateY(-50%);
  background:none;border:0;font-size:1.05rem;cursor:pointer;padding:6px;color:var(--muted);
}

/* ---------- Buttons ---------- */
.btn{
  font:inherit;font-weight:700;
  border:0;border-radius:12px;
  padding:13px 20px;
  cursor:pointer;
  transition:transform .06s, box-shadow .15s, background .15s;
}
.btn:active{transform:scale(.98)}
.btn-block{width:100%}
.btn-primary{
  background:var(--navy);
  color:var(--white);
  box-shadow:0 6px 16px rgba(27,38,83,.28);
}
.btn-primary:hover{background:var(--navy-deep)}
.btn-outline{background:var(--white);color:var(--navy);border:1.5px solid var(--navy)}
.btn-ghost{background:transparent;color:var(--white)}
.btn-sm{padding:8px 14px;font-size:.85rem}
.btn[disabled]{opacity:.6;cursor:wait}

/* =====================================================
   APP SHELL
   ===================================================== */
.app-shell{min-height:100vh;display:flex;flex-direction:column;background:var(--white)}

/* ---------- Top bar ---------- */
.topbar{position:sticky;top:0;z-index:40;background:var(--navy)}
.topbar-inner{
  max-width:1100px;margin:0 auto;
  display:flex;align-items:center;gap:14px;
  padding:10px 16px;
  padding-top:calc(10px + env(safe-area-inset-top));
}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.brand-logo{
  height:44px;width:44px;object-fit:contain;
  background:var(--white);              /* logo always on white */
  border-radius:10px;padding:3px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;color:var(--white);min-width:0}
.brand-text strong{font-family:var(--font-display);letter-spacing:.05em;font-size:1rem;white-space:nowrap}
.brand-text span{font-size:.7rem;color:var(--gold);letter-spacing:.12em;text-transform:uppercase}
.topbar-user{margin-left:auto;display:flex;align-items:center;gap:10px}
.user-chip{
  background:rgba(255,255,255,.12);
  color:var(--white);
  font-size:.78rem;font-weight:600;
  padding:6px 12px;border-radius:999px;
  max-width:130px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

/* ---------- Desktop nav (hidden on mobile) ---------- */
.desktop-nav{display:none;gap:4px}
.nav-link{
  color:rgba(255,255,255,.85);
  text-decoration:none;font-weight:600;font-size:.92rem;
  padding:9px 14px;border-radius:10px;
}
.nav-link:hover{background:rgba(255,255,255,.1);color:var(--white)}
.nav-link.active{background:var(--gold);color:var(--navy)}

/* ---------- Main ---------- */
.main{
  flex:1;
  width:100%;max-width:1100px;margin:0 auto;
  padding:18px 16px calc(88px + env(safe-area-inset-bottom));
}

.hero{margin:6px 0 18px}
.eyebrow{
  color:var(--gold);font-weight:800;font-size:.72rem;
  letter-spacing:.18em;text-transform:uppercase;
}
.hero h2{font-family:var(--font-display);font-size:1.7rem;color:var(--navy);letter-spacing:.02em}
.hero-sub{color:var(--muted);font-size:.93rem;max-width:520px}

.view-head{margin:6px 0 16px}
.view-head h2{font-family:var(--font-display);font-size:1.55rem;color:var(--navy)}
.view-head p{color:var(--muted);font-size:.92rem}

.card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:20px 18px;
  margin-bottom:16px;
}
.card-title{
  font-family:var(--font-display);
  color:var(--navy);
  font-size:1.15rem;
  margin-bottom:14px;
  padding-bottom:10px;
  border-bottom:2px solid var(--gold);
  display:inline-block;
}

/* ---------- Drop zone ---------- */
.drop-zone{
  border:2px dashed var(--line);
  border-radius:12px;
  background:var(--mist);
  padding:20px 14px;
  text-align:center;
  cursor:pointer;
  transition:border-color .15s, background .15s;
}
.drop-zone:hover,.drop-zone:focus,.drop-zone.drag{border-color:var(--gold);background:var(--gold-soft)}
.drop-icon{
  width:46px;height:46px;margin:0 auto 8px;
  display:flex;align-items:center;justify-content:center;
  background:var(--navy);color:var(--gold);
  font-size:1.3rem;border-radius:50%;
}
.drop-empty small{color:var(--muted)}
.drop-file{display:flex;align-items:center;gap:12px;text-align:left}
.file-badge{
  background:var(--navy);color:var(--gold);
  font-size:.68rem;font-weight:800;letter-spacing:.06em;
  padding:8px 10px;border-radius:8px;min-width:52px;text-align:center;
}
.drop-file-meta{flex:1;min-width:0}
.drop-file-meta strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.92rem}
.drop-file-meta small{color:var(--muted)}
.chip-x{background:var(--mist);border:1px solid var(--line);border-radius:50%;width:30px;height:30px;cursor:pointer;color:var(--muted)}

/* ---------- Project lists ---------- */
.search-field input{background:var(--white)}
.project-list{display:grid;gap:12px}
.project-card{
  display:flex;align-items:center;gap:12px;
  background:var(--white);
  border:1px solid var(--line);
  border-left:4px solid var(--gold);
  border-radius:12px;
  padding:14px;
  box-shadow:0 3px 12px rgba(19,28,64,.06);
}
.project-card .file-badge{flex-shrink:0}
.project-meta{flex:1;min-width:0}
.project-meta strong{display:block;font-size:.98rem;color:var(--navy);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.project-meta small{display:block;color:var(--muted);font-size:.8rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.project-open{
  flex-shrink:0;
  text-decoration:none;font-weight:700;font-size:.82rem;
  background:var(--navy);color:var(--white);
  padding:9px 14px;border-radius:10px;
}
.project-open:hover{background:var(--navy-deep)}

.empty{text-align:center;color:var(--muted);padding:40px 16px}
.empty-logo{height:84px;opacity:.35;margin-bottom:10px;filter:grayscale(1)}

/* ---------- Account ---------- */
.account-card{padding:6px 18px}
.account-row{
  display:flex;justify-content:space-between;align-items:center;gap:12px;
  padding:13px 0;border-bottom:1px solid var(--line);
}
.account-row:last-child{border-bottom:0}
.account-row span{color:var(--muted);font-size:.85rem;text-transform:uppercase;letter-spacing:.05em}
.account-row strong{color:var(--navy)}

/* ---------- Bottom tab bar (mobile) ---------- */
.tabbar{
  position:fixed;bottom:0;left:0;right:0;z-index:40;
  display:flex;
  background:var(--white);
  border-top:1px solid var(--line);
  box-shadow:0 -6px 20px rgba(19,28,64,.08);
  padding-bottom:env(safe-area-inset-bottom);
}
.tab{
  flex:1;
  background:none;border:0;cursor:pointer;
  display:flex;flex-direction:column;align-items:center;gap:2px;
  padding:9px 4px 7px;
  font:inherit;font-size:.68rem;font-weight:700;color:var(--muted);
  border-top:3px solid transparent;
}
.tab-ico{font-size:1.15rem;line-height:1}
.tab.active{color:var(--navy);border-top-color:var(--gold)}

/* ---------- Toast & loader ---------- */
.toast{
  position:fixed;left:50%;bottom:calc(84px + env(safe-area-inset-bottom));
  transform:translateX(-50%) translateY(20px);
  background:var(--navy);color:var(--white);
  padding:12px 20px;border-radius:12px;
  font-size:.9rem;font-weight:600;
  box-shadow:var(--shadow);
  opacity:0;pointer-events:none;
  transition:opacity .25s, transform .25s;
  z-index:100;max-width:90vw;text-align:center;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast.error{background:var(--danger)}

.loader{
  position:fixed;inset:0;z-index:90;
  background:rgba(255,255,255,.9);
  display:flex;align-items:center;justify-content:center;
}
.loader-card{text-align:center}
.loader-logo{height:90px;margin-bottom:14px}
.loader-bar{
  width:170px;height:5px;margin:0 auto 10px;
  background:var(--line);border-radius:99px;overflow:hidden;
}
.loader-bar span{
  display:block;height:100%;width:40%;
  background:var(--gold);border-radius:99px;
  animation:slide 1.1s infinite ease-in-out;
}
@keyframes slide{0%{margin-left:-40%}100%{margin-left:100%}}
#loaderText{color:var(--muted);font-size:.88rem;font-weight:600}

.desktop-only{display:none}

/* =====================================================
   DESKTOP — full website layout (≥ 900px)
   ===================================================== */
@media (min-width:900px){
  .mobile-only{display:none !important}
  .desktop-only{display:inline-flex}
  .desktop-nav{display:flex}
  .topbar-inner{padding:12px 24px}
  .brand-logo{height:52px;width:52px}
  .brand-text strong{font-size:1.15rem}
  .main{padding:34px 24px 60px}
  .hero{
    background:linear-gradient(120deg, var(--mist), var(--white) 65%);
    border:1px solid var(--line);
    border-radius:18px;
    padding:30px 34px;
    margin-bottom:26px;
  }
  .hero h2{font-size:2.2rem}
  .upload-card{max-width:640px}
  .project-list.all{grid-template-columns:1fr 1fr}
  .project-list:not(.all){grid-template-columns:1fr 1fr}
  .card{padding:26px 24px}
  .view-head h2{font-size:1.9rem}
  .toast{bottom:36px}
}
@media (min-width:1200px){
  .project-list.all{grid-template-columns:1fr 1fr 1fr}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
}