/* ============================================================
   PastPapers.wiki — Upload Portal
   Aesthetic: warm, trustworthy, community-driven "give back"
   ============================================================ */

:root{
  --ink:#0d1b2a;          /* deep navy text            */
  --ink-soft:#41546b;     /* secondary text            */
  --line:#e4ddd0;         /* warm hairline             */
  --paper:#f7f4ee;        /* warm off-white page       */
  --card:#ffffff;
  --brand:#0d80d8;        /* pastpapers blue           */
  --brand-deep:#0a5fb0;
  --accent:#ff7a45;       /* warm coral — the "help" tone */
  --accent-deep:#e85f2a;
  --good:#12905a;
  --bad:#d64545;
  --shadow:0 18px 50px -22px rgba(13,27,42,.35);
  --shadow-sm:0 6px 20px -12px rgba(13,27,42,.4);
  --r:18px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:"Noto Sans Sinhala",system-ui,sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.6;
  min-height:100dvh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  position:relative;
}

/* soft animated background wash */
.aurora{
  position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(45rem 30rem at 15% -8%, rgba(13,128,216,.16), transparent 60%),
    radial-gradient(40rem 28rem at 92% 4%, rgba(255,122,69,.16), transparent 60%),
    radial-gradient(50rem 40rem at 50% 118%, rgba(18,144,90,.10), transparent 60%);
}
/* subtle paper grain */
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.035'/%3E%3C/svg%3E");
}

.wrap{
  width:100%;max-width:680px;margin-inline:auto;
  padding:clamp(18px,4vw,40px) clamp(16px,4vw,28px) 60px;
}

/* ---------------- HERO ---------------- */
.hero{text-align:center;padding:10px 4px 26px}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  text-decoration:none;color:var(--ink);margin-bottom:22px;
}
.brand-mark{
  display:grid;place-items:center;width:38px;height:38px;border-radius:11px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#fff;font-family:"Gemunu Libre",sans-serif;font-weight:700;font-size:17px;
  letter-spacing:.5px;box-shadow:var(--shadow-sm);
}
.brand-name{font-family:"Gemunu Libre",sans-serif;font-weight:700;font-size:20px}
.brand-name span{color:var(--brand)}

.hero h1{
  font-family:"Gemunu Libre","Noto Sans Sinhala",sans-serif;
  font-weight:700;line-height:1.15;
  font-size:clamp(1.7rem,6.4vw,2.6rem);
  letter-spacing:-.01em;
}
.hero h1 em{
  font-style:normal;color:var(--accent-deep);
  background:linear-gradient(transparent 66%, rgba(255,122,69,.22) 0);
}
.lead{
  margin:16px auto 0;max-width:52ch;color:var(--ink-soft);
  font-size:clamp(1rem,3.4vw,1.08rem);
}
.lead strong{color:var(--ink);font-weight:600}

.trust{
  list-style:none;display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:22px;
}
.trust li{
  display:inline-flex;align-items:center;gap:7px;
  background:var(--card);border:1px solid var(--line);
  padding:7px 14px;border-radius:999px;font-size:.86rem;font-weight:500;
  box-shadow:var(--shadow-sm);
}
.trust li span{
  display:inline-grid;place-items:center;min-width:20px;height:20px;padding:0 5px;
  border-radius:6px;background:var(--brand);color:#fff;font-size:.72rem;font-weight:700;
}
.trust li:nth-child(2) span{background:var(--good)}
.trust li:nth-child(3) span{background:var(--accent)}

/* ---------------- CARD ---------------- */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:clamp(18px,4.5vw,32px);box-shadow:var(--shadow);
}
.field{border:0;margin-bottom:26px}
.field:last-of-type{margin-bottom:20px}
legend{
  display:flex;align-items:center;gap:10px;
  font-family:"Gemunu Libre","Noto Sans Sinhala",sans-serif;
  font-weight:600;font-size:1.18rem;margin-bottom:14px;
}
legend b{
  display:grid;place-items:center;width:26px;height:26px;border-radius:8px;
  background:var(--ink);color:#fff;font-size:.9rem;font-weight:700;flex:none;
}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:9px}
.chip{cursor:pointer;position:relative}
.chip input{position:absolute;opacity:0;inset:0;cursor:pointer}
.chip span{
  display:block;padding:10px 15px;border-radius:12px;
  border:1.5px solid var(--line);background:#fbf9f5;
  font-size:.9rem;font-weight:500;transition:.16s ease;
}
.chip:hover span{border-color:var(--brand)}
.chip input:checked + span{
  border-color:var(--brand);color:#fff;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  box-shadow:var(--shadow-sm);
}
.chip input:focus-visible + span{outline:3px solid rgba(13,128,216,.35);outline-offset:2px}

/* dropzone */
.dropzone{
  display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center;
  padding:30px 18px;border:2px dashed #cdd7e0;border-radius:16px;
  background:
    linear-gradient(#fbfcfe,#fbfcfe) padding-box;
  cursor:pointer;transition:.18s ease;
}
.dropzone:hover{border-color:var(--brand);background:#f2f8ff}
.dropzone.drag{border-color:var(--accent);background:#fff3ec;transform:scale(1.01)}
.dz-icon{
  display:grid;place-items:center;width:60px;height:60px;border-radius:16px;
  color:var(--brand);background:#eaf4ff;
}
.dropzone.drag .dz-icon{color:var(--accent-deep);background:#ffe6d9}
.dz-text strong{color:var(--brand)}
.dz-text small{display:block;margin-top:5px;color:var(--ink-soft);font-size:.82rem}

/* file list */
.file-list{list-style:none;margin-top:12px;display:flex;flex-direction:column;gap:8px}
.file-list li{
  display:flex;align-items:center;gap:12px;
  background:#fbf9f5;border:1px solid var(--line);border-radius:12px;
  padding:10px 12px;animation:pop .2s ease;
}
.file-list .fi-badge{
  flex:none;display:grid;place-items:center;width:38px;height:38px;border-radius:9px;
  background:#fdeceb;color:var(--bad);font-weight:700;font-size:.68rem;font-family:"Gemunu Libre",sans-serif;
}
.file-list .fi-meta{flex:1;min-width:0}
.file-list .fi-name{
  display:block;font-size:.9rem;font-weight:500;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.file-list .fi-size{display:block;font-size:.78rem;color:var(--ink-soft)}
.file-list .fi-bad .fi-name{color:var(--bad)}
.file-list .fi-remove{
  flex:none;border:0;background:transparent;color:var(--ink-soft);cursor:pointer;
  width:30px;height:30px;border-radius:8px;font-size:1.2rem;line-height:1;transition:.15s;
}
.file-list .fi-remove:hover{background:#fdeceb;color:var(--bad)}

/* inputs */
.row{display:flex;gap:12px}
.row .input{flex:1}
.input{display:block;margin-bottom:14px}
.input > span{display:block;font-size:.9rem;font-weight:600;margin-bottom:6px}
.input > span small{font-weight:400;color:var(--ink-soft)}
.input .req{color:var(--accent-deep)}
.input input,.input textarea{
  width:100%;font:inherit;font-size:1rem;color:var(--ink);
  padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;
  background:#fbf9f5;transition:.15s;resize:vertical;
}
.input textarea{min-height:84px}
.input input:focus,.input textarea:focus{
  outline:0;border-color:var(--brand);background:#fff;
  box-shadow:0 0 0 4px rgba(13,128,216,.12);
}
.input input::placeholder,.input textarea::placeholder{color:#a7a294}

/* submit */
.submit{
  width:100%;border:0;cursor:pointer;position:relative;
  font-family:"Gemunu Libre","Noto Sans Sinhala",sans-serif;
  font-weight:700;font-size:1.18rem;color:#fff;letter-spacing:.01em;
  padding:16px;border-radius:14px;margin-top:6px;
  background:linear-gradient(135deg,var(--accent),var(--accent-deep));
  box-shadow:0 14px 28px -12px rgba(232,95,42,.7);
  transition:transform .12s ease,box-shadow .2s ease,filter .2s;
}
.submit:hover{transform:translateY(-2px);box-shadow:0 20px 34px -12px rgba(232,95,42,.8)}
.submit:active{transform:translateY(0)}
.submit:disabled{filter:grayscale(.4) opacity(.75);cursor:progress;transform:none}
.btn-spin{
  display:none;width:18px;height:18px;border-radius:50%;
  border:2.5px solid rgba(255,255,255,.45);border-top-color:#fff;
  margin-left:10px;vertical-align:-4px;animation:spin .7s linear infinite;
}
.submit.loading .btn-spin{display:inline-block}
.submit.loading .btn-label{opacity:.85}

.fineprint{text-align:center;font-size:.8rem;color:var(--ink-soft);margin-top:12px}

/* progress + messages */
.progress{margin-top:16px;height:8px;border-radius:99px;background:#eee7da;overflow:hidden}
#progressBar{height:100%;width:0;border-radius:99px;
  background:linear-gradient(90deg,var(--brand),var(--accent));transition:width .2s}
.form-msg{margin-top:14px;text-align:center;font-weight:600;font-size:.95rem;display:none}
.form-msg.show{display:block}
.form-msg.err{color:var(--bad)}

/* honeypot */
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}

/* success */
.success-card{text-align:center}
.success-emoji{font-size:3.4rem;animation:pop .4s ease}
.success-card h2{
  font-family:"Gemunu Libre","Noto Sans Sinhala",sans-serif;font-weight:700;
  font-size:2rem;margin:6px 0 4px;color:var(--good);
}
.success-card .muted{color:var(--ink-soft);font-size:.92rem;margin-top:6px}
.success-actions{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:22px}
.ghost{
  display:inline-flex;align-items:center;gap:6px;text-decoration:none;cursor:pointer;
  font:inherit;font-weight:600;font-size:.95rem;color:var(--brand);
  padding:11px 18px;border-radius:11px;border:1.5px solid var(--brand);background:#fff;
  transition:.15s;
}
.ghost:hover{background:var(--brand);color:#fff}

/* footer */
.foot{text-align:center;margin-top:28px;color:var(--ink-soft);font-size:.85rem}
.foot a{color:var(--brand);text-decoration:none;font-weight:600}

/* ---------------- motion ---------------- */
.reveal{opacity:0;transform:translateY(14px);animation:rise .6s cubic-bezier(.2,.7,.2,1) forwards;animation-delay:var(--d,0s)}
@keyframes rise{to{opacity:1;transform:none}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes pop{from{transform:scale(.8);opacity:0}to{transform:scale(1);opacity:1}}
@media (prefers-reduced-motion:reduce){
  *,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* ---------------- small screens ---------------- */
@media (max-width:420px){
  .row{flex-direction:column;gap:0}
  .chip span{padding:9px 13px;font-size:.86rem}
}