:root {
  --bg: #f8f9fb;
  --surface: #ffffff;
  --border: #e5e7eb;
  --text: #1a1a2e;
  --text-secondary: #6b7280;
  --text-tertiary: #9ca3af;
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #eef2ff;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --danger-light: #fef2f2;
  --success: #16a34a;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -2px rgba(0,0,0,.05);
  --radius: 10px;
  --radius-sm: 6px;
  --transition: .2s ease;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1117;
    --surface: #1a1d24;
    --border: #2a2d35;
    --text: #e4e4e7;
    --text-secondary: #9ca3af;
    --text-tertiary: #6b7280;
    --primary: #818cf8;
    --primary-hover: #6366f1;
    --primary-light: #1e1b4b;
    --danger: #f87171;
    --danger-hover: #ef4444;
    --danger-light: #2d1b1e;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.2);
    --shadow: 0 1px 3px rgba(0,0,0,.3);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,.4);
  }
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;line-height:1.6;-webkit-font-smoothing:antialiased}

/* Layout */
.topbar{background:var(--surface);border-bottom:1px solid var(--border);padding:0 1.5rem;height:56px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:100;backdrop-filter:blur(12px)}
.topbar-brand{display:flex;align-items:center;gap:.6rem;font-weight:600;font-size:1rem;color:var(--text);text-decoration:none}
.topbar-brand svg{color:var(--primary)}
.topbar-actions{display:flex;align-items:center;gap:.5rem}
.wrapper{max-width:1024px;margin:0 auto;padding:2rem 1.5rem}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.5rem 1rem;border:none;border-radius:var(--radius-sm);font-size:.875rem;font-weight:500;cursor:pointer;transition:all var(--transition);font-family:inherit;white-space:nowrap}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-hover);box-shadow:0 0 0 3px rgba(99,102,241,.3)}
.btn-danger{background:var(--danger);color:#fff}
.btn-danger:hover{background:var(--danger-hover)}
.btn-ghost{background:transparent;color:var(--text-secondary)}
.btn-ghost:hover{background:var(--bg);color:var(--text)}
.btn-sm{padding:.35rem .7rem;font-size:.8rem}
.btn-lg{padding:.65rem 1.5rem;font-size:.95rem}
.btn:disabled{opacity:.5;pointer-events:none}

/* Cards */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;transition:all var(--transition)}
.card:hover{border-color:var(--primary);box-shadow:var(--shadow-md)}

/* Input */
.input{width:100%;padding:.55rem .8rem;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:.9rem;font-family:inherit;background:var(--surface);color:var(--text);transition:border-color var(--transition)}
.input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(99,102,241,.15)}
.input:read-only{background:var(--bg);color:var(--text-secondary)}

/* Login */
.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;background:var(--bg)}
.login-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:2.5rem 2rem;width:100%;max-width:400px;box-shadow:var(--shadow-md)}
.login-card .logo{text-align:center;margin-bottom:1.5rem}
.login-card .logo svg{width:40px;height:40px;color:var(--primary)}
.login-card h1{font-size:1.25rem;font-weight:600;text-align:center;margin-bottom:1.5rem}
.login-card .field{margin-bottom:1rem}
.login-card .field label{display:block;font-size:.8rem;font-weight:500;color:var(--text-secondary);margin-bottom:.25rem}

/* Dashboard */
.dashboard-header{margin-bottom:1.5rem}
.dashboard-header h2{font-size:1.25rem;font-weight:600}
.dashboard-header p{color:var(--text-secondary);font-size:.875rem;margin-top:.25rem}
.project-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1rem}
.project-card{cursor:default}
.project-card .pname{font-size:1rem;font-weight:600;color:var(--primary);word-break:break-all;margin-bottom:.5rem}
.project-card .purl{display:flex;gap:.5rem;align-items:center;margin-bottom:.75rem}
.project-card .purl input{flex:1;padding:.4rem .6rem;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:.8rem;background:var(--bg);color:var(--text-secondary)}
.project-card .pmeta{font-size:.78rem;color:var(--text-tertiary);display:flex;gap:1rem}
.project-card .pactions{display:flex;gap:.5rem;margin-top:.75rem;padding-top:.75rem;border-top:1px solid var(--border)}

/* Upload */
.upload-card{max-width:640px;margin:0 auto}
.upload-card .field{margin-bottom:1.25rem}
.upload-card .field label{display:block;font-size:.85rem;font-weight:500;margin-bottom:.35rem}
.dropzone{border:2px dashed var(--border);border-radius:var(--radius);padding:2.5rem 1.5rem;text-align:center;cursor:pointer;transition:all var(--transition)}
.dropzone:hover,.dropzone.active{border-color:var(--primary);background:var(--primary-light)}
.dropzone svg{width:40px;height:40px;color:var(--text-tertiary);margin-bottom:.75rem;transition:color var(--transition)}
.dropzone.active svg{color:var(--primary)}
.dropzone .dz-text{font-size:.9rem;color:var(--text-secondary)}
.dropzone .dz-hint{font-size:.78rem;color:var(--text-tertiary);margin-top:.3rem}
.file-preview{list-style:none;margin-top:.75rem}
.file-preview li{display:flex;align-items:center;justify-content:space-between;padding:.5rem .75rem;background:var(--bg);border-radius:var(--radius-sm);margin-bottom:.3rem;font-size:.85rem}
.file-preview li .fname{color:var(--text);font-weight:500}
.file-preview li .fsize{color:var(--text-tertiary);font-size:.8rem}
.result-box{background:var(--primary-light);border:1px solid var(--primary);border-radius:var(--radius);padding:1.25rem;text-align:center;margin-top:1rem}
.result-box .msg{font-weight:600;color:var(--success)}
.result-box .url-row{display:flex;gap:.5rem;margin-top:.75rem}
.result-box .url-row input{flex:1;padding:.4rem .6rem;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:.85rem;background:var(--surface);color:var(--text)}

/* Project Detail */
.detail-header{display:flex;align-items:center;gap:1rem;margin-bottom:1.5rem}
.detail-header h2{font-size:1.25rem;font-weight:600}

/* Toast */
.toast-container{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%);z-index:999}
.toast{background:var(--text);color:var(--bg);padding:.6rem 1.25rem;border-radius:var(--radius-sm);font-size:.85rem;font-weight:500;box-shadow:var(--shadow-md);animation:slideUp .25s ease}
@keyframes slideUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* Modal */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);display:flex;align-items:center;justify-content:center;z-index:200;animation:fadeIn .15s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;max-width:400px;width:90%;box-shadow:0 20px 60px rgba(0,0,0,.2);animation:scaleIn .15s ease}
@keyframes scaleIn{from{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}
.modal h3{font-size:1.05rem;font-weight:600;margin-bottom:.5rem}
.modal p{color:var(--text-secondary);font-size:.875rem;margin-bottom:1.25rem}
.modal-actions{display:flex;gap:.5rem;justify-content:flex-end}

/* Empty */
.empty-state{text-align:center;padding:3rem 1rem;color:var(--text-tertiary)}
.empty-state svg{margin-bottom:1rem}
.empty-state p{font-size:.9rem}

/* Error */
.error-msg{color:var(--danger);font-size:.85rem;margin-top:.3rem}

/* Spinner */
.spinner{width:18px;height:18px;border:2px solid var(--border);border-top:2px solid var(--primary);border-radius:50%;animation:spin .6s linear infinite;display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}

/* Badge */
.badge{display:inline-block;padding:.15rem .5rem;border-radius:20px;font-size:.75rem;font-weight:500;background:var(--primary-light);color:var(--primary)}

/* Mobile */
@media (max-width:640px) {
  .wrapper{padding:1rem}
  .project-grid{grid-template-columns:1fr}
  .login-card{padding:1.5rem;max-width:100%}
  .topbar{padding:0 1rem}
}