[hidden]{display:none!important}
:root{
  --ink:#0f1c2e;--ink-soft:#44546a;--paper:#f5f3ee;--card:#ffffff;
  --accent:#e8542f;--accent-dark:#c9401f;--teal:#0e6e6a;
  --line:#e4dfd4;--radius:16px;
  --shadow:0 10px 30px rgba(15,28,46,.10);
  --font-head:'Sora',sans-serif;--font-body:'Inter',sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);color:var(--ink);background:var(--paper);line-height:1.6}
h1,h2,h3{font-family:var(--font-head);line-height:1.15}
a{color:inherit;text-decoration:none}

/* ===== top bar ===== */
.topbar{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:24px;height:68px;padding:0 clamp(16px,4vw,40px);background:rgba(245,243,238,.82);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-head);font-weight:800;font-size:1.15rem;letter-spacing:-.02em}
.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--accent);color:#fff;font-size:1rem;box-shadow:0 4px 12px rgba(232,84,47,.35)}
.topnav{display:flex;gap:22px;margin-left:auto}
.topnav a{font-weight:500;font-size:.92rem;color:var(--ink-soft);position:relative;padding:4px 0}
.topnav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--accent);transition:width .25s}
.topnav a:hover::after{width:100%}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-body);font-weight:600;font-size:.9rem;padding:10px 20px;border-radius:999px;border:none;cursor:pointer;transition:transform .15s,box-shadow .15s,background .15s;white-space:nowrap}
.btn:active{transform:scale(.97)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 4px 14px rgba(232,84,47,.35)}
.btn-accent:hover{background:var(--accent-dark);box-shadow:0 6px 18px rgba(232,84,47,.45);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--ink);background:#fff}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}

/* ===== hero ===== */
.hero{position:relative;min-height:clamp(480px,62vh,640px);display:flex;align-items:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.hero-scrim{position:absolute;inset:0;z-index:1;background:linear-gradient(115deg,rgba(11,20,34,.82) 0%,rgba(11,20,34,.6) 55%,rgba(11,20,34,.35) 100%)}
.hero-inner{position:relative;z-index:2;max-width:640px;padding:64px clamp(20px,5vw,56px);color:#fff}
.hero-kicker{font-family:var(--font-head);font-weight:600;font-size:.8rem;letter-spacing:.18em;text-transform:uppercase;color:#ffb59e;margin-bottom:14px}
.hero h1{font-size:clamp(2.1rem,5vw,3.4rem);font-weight:800;letter-spacing:-.03em;margin-bottom:16px}
.hero-sub{font-size:clamp(.98rem,1.6vw,1.12rem);color:rgba(255,255,255,.85);max-width:46ch;margin-bottom:30px}

/* dropzone */
.drop{display:flex;align-items:center;gap:18px;padding:22px 26px;border:2px dashed rgba(255,255,255,.5);border-radius:var(--radius);background:rgba(255,255,255,.08);backdrop-filter:blur(6px);cursor:pointer;transition:border-color .2s,background .2s,transform .2s;max-width:520px}
.drop:hover,.drop:focus-visible{border-color:#fff;background:rgba(255,255,255,.14);transform:translateY(-2px)}
.drop.dragover{border-color:var(--accent);background:rgba(232,84,47,.22)}
.drop-icon{font-size:1.9rem;line-height:1;color:#ffb59e}
.drop-text{font-size:.98rem}
.drop-text span{font-size:.84rem;color:rgba(255,255,255,.7)}
.upload-status{margin-top:16px;max-width:520px;padding:12px 18px;border-radius:12px;background:rgba(255,255,255,.14);backdrop-filter:blur(6px);font-size:.9rem;display:flex;align-items:center;gap:12px}
.upload-status.err{background:rgba(201,64,31,.85);color:#fff}

/* ===== main ===== */
.wrap{max-width:1080px;margin:0 auto;padding:0 clamp(16px,4vw,40px)}
.docs-section{padding:64px 0 24px;position:relative}
.section-head{display:flex;align-items:center;gap:12px;margin-bottom:24px}
.section-head h2{font-size:clamp(1.5rem,3vw,2rem);letter-spacing:-.02em}
.count-pill{background:var(--teal);color:#fff;font-size:.78rem;font-weight:700;padding:3px 11px;border-radius:999px}

.doc-list{display:grid;gap:14px}
.doc-card{position:relative;display:flex;align-items:center;gap:16px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;box-shadow:var(--shadow);transition:transform .18s,box-shadow .18s;animation:rise .35s ease both}
.doc-card:hover{transform:translateY(-3px);box-shadow:0 16px 36px rgba(15,28,46,.14)}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.doc-icon{flex:none;display:grid;place-items:center;width:52px;height:52px;border-radius:14px;font-family:var(--font-head);font-weight:800;font-size:.8rem;color:#fff}
.doc-icon.pdf{background:linear-gradient(135deg,#e8542f,#c9401f)}
.doc-icon.docx{background:linear-gradient(135deg,#0e6e6a,#0a5451)}
.doc-info{min-width:0;flex:1}
.doc-name{font-weight:600;font-size:1rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.doc-meta{font-size:.82rem;color:var(--ink-soft);display:flex;gap:10px;flex-wrap:wrap}
.doc-actions{display:flex;gap:8px;flex:none}
.icon-btn{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;border:1.5px solid var(--line);background:#fff;cursor:pointer;font-size:1rem;transition:border-color .15s,background .15s,transform .15s}
.icon-btn:hover{transform:translateY(-1px)}
.icon-btn.danger:hover{border-color:#c9401f;background:#fdece7;color:#c9401f}
.icon-btn:disabled{opacity:.5;cursor:not-allowed}

.empty{text-align:center;padding:40px 20px;color:var(--ink-soft)}
.empty-art{width:180px;max-width:60%;border-radius:20px;margin-bottom:18px;box-shadow:var(--shadow)}
.empty h3{color:var(--ink);margin-bottom:6px}

.skeletons{display:grid;gap:14px}
.skel{height:84px;border-radius:var(--radius);background:linear-gradient(90deg,#ece8de 25%,#f7f4ec 50%,#ece8de 75%);background-size:200% 100%;animation:shimmer 1.3s infinite}
@keyframes shimmer{to{background-position:-200% 0}}

/* messages / toast */
.msg{display:flex;align-items:center;gap:14px;padding:14px 18px;border-radius:12px;font-size:.92rem;margin-bottom:18px}
.msg-error{background:#fdece7;border:1px solid #f3c4b5;color:#8f2d13}
.msg-close{margin-left:auto;background:none;border:none;cursor:pointer;font-size:.9rem;color:inherit;padding:4px}
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);z-index:100;background:var(--ink);color:#fff;padding:12px 22px;border-radius:999px;font-size:.9rem;box-shadow:0 10px 30px rgba(0,0,0,.3);animation:rise .3s ease}

/* ===== how ===== */
.how{padding:56px 0 80px}
.how h2{font-size:clamp(1.5rem,3vw,2rem);letter-spacing:-.02em;margin-bottom:28px}
.how-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.how-card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:52px 24px 26px;box-shadow:var(--shadow)}
.how-num{position:absolute;top:-16px;left:22px;z-index:1;display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:var(--teal);color:#fff;font-family:var(--font-head);font-weight:800;box-shadow:0 6px 14px rgba(14,110,106,.35)}
.how-card h3{font-size:1.05rem;margin-bottom:8px}
.how-card p{font-size:.9rem;color:var(--ink-soft)}

.foot{text-align:center;padding:28px 16px;font-size:.85rem;color:var(--ink-soft);border-top:1px solid var(--line)}

/* ===== viewer page ===== */
.viewer-body{display:flex;flex-direction:column;min-height:100vh;background:#e9e5db}
.viewer-bar{gap:14px}
.back-btn{padding:8px 16px;font-size:.85rem}
.viewer-title-wrap{display:flex;align-items:center;gap:10px;min-width:0;flex:1}
.viewer-title{font-size:clamp(.95rem,2vw,1.15rem);font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.doc-badge{flex:none;font-family:var(--font-head);font-weight:800;font-size:.66rem;letter-spacing:.08em;padding:4px 10px;border-radius:999px;color:#fff}
.doc-badge.pdf{background:var(--accent)}
.doc-badge.docx{background:var(--teal)}
.viewer-main{flex:1;display:flex;flex-direction:column;position:relative}
.doc-frame{flex:1;width:100%;border:none;min-height:calc(100vh - 68px);background:#fff}
.viewer-loading{position:absolute;inset:0;z-index:2;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;color:var(--ink-soft)}
.spinner{width:44px;height:44px;border-radius:50%;border:4px solid var(--line);border-top-color:var(--accent);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.viewer-error{margin:40px auto;max-width:520px;flex-direction:column;align-items:flex-start}

/* ===== responsive ===== */
@media (max-width:640px){
  .topnav{display:none}
  .drop{flex-direction:column;text-align:center;gap:10px;padding:26px 18px}
  .doc-card{flex-wrap:wrap}
  .doc-actions{margin-left:auto}
  .viewer-bar .btn-accent{padding:8px 14px;font-size:.8rem}
}