/* ── Variables ───────────────────────────────────────────── */
:root {
  --bg:        #f4f5f7;
  --surface:   #ffffff;
  --border:    #e1e4e8;
  --text:      #1a1a2e;
  --text-sub:  #6b7280;
  --primary:   #1a237e;
  --primary-h: #283593;
  --accent:    #3949ab;
  --success:   #1b5e20;
  --success-bg:#e8f5e9;
  --danger:    #b71c1c;
  --danger-bg: #ffebee;
  --shadow:    0 1px 4px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
  --radius:    14px;
  --radius-sm: 8px;
}

/* ── Reset ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
       background: var(--bg); color: var(--text); min-height: 100vh; font-size: 15px; }
.hidden { display: none !important; }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 18px; border-radius: var(--radius-sm);
  border: none; cursor: pointer; font-size: 14px; font-weight: 600;
  transition: opacity .15s, transform .1s, background .15s;
  white-space: nowrap; text-decoration: none;
}
.btn:hover   { opacity: .88; }
.btn:active  { transform: scale(.97); }
.btn:disabled{ opacity: .45; cursor: not-allowed; pointer-events: none; }
.btn-sm      { padding: 6px 13px; font-size: 12px; }
.btn-full    { width: 100%; }

.btn-primary     { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-h); opacity: 1; }
.btn-secondary   { background: var(--surface); color: var(--primary);
                   border: 1.5px solid var(--primary); }
.btn-ghost       { background: transparent; color: var(--text-sub); }
.btn-ghost:hover { background: var(--border); }
.btn-ghost-white { background: transparent; color: rgba(255,255,255,.85);
                   border: 1px solid rgba(255,255,255,.3); }
.btn-ghost-white:hover { background: rgba(255,255,255,.15); opacity: 1; }
.btn-danger      { background: var(--danger-bg); color: var(--danger);
                   border: 1.5px solid #ef9a9a; }

/* ── Login ───────────────────────────────────────────────── */
#page-login {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(145deg, #0d1757 0%, #1a237e 60%, #283593 100%);
  padding: 16px;
}
.login-card {
  background: var(--surface); border-radius: var(--radius);
  padding: 44px 36px; width: 100%; max-width: 380px;
  box-shadow: 0 24px 64px rgba(0,0,0,.35); text-align: center;
}
.login-logo { font-size: 44px; margin-bottom: 14px; }
.login-card h1 { font-size: 22px; margin-bottom: 4px; }
.subtitle { color: var(--text-sub); font-size: 13px; margin-bottom: 32px; }

.field { text-align: left; margin-bottom: 16px; }
.field label { display: block; font-size: 12px; font-weight: 700;
               color: var(--text-sub); margin-bottom: 5px; text-transform: uppercase;
               letter-spacing: .4px; }
.field input {
  width: 100%; padding: 11px 13px;
  border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  font-size: 15px; transition: border-color .2s;
}
.field input:focus { outline: none; border-color: var(--accent); }

.error-msg { background: var(--danger-bg); color: var(--danger);
             padding: 10px 14px; border-radius: var(--radius-sm);
             font-size: 13px; margin-bottom: 12px; text-align: left; }
.login-card .btn { margin-top: 6px; }

/* ── Header ──────────────────────────────────────────────── */
header {
  background: var(--primary); color: #fff;
  padding: 0 20px; height: 56px;
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.25);
}
.header-left  { display: flex; align-items: center; gap: 10px; }
.header-icon  { font-size: 20px; }
.header-title { font-size: 17px; font-weight: 700; letter-spacing: -.2px; }
.header-right { display: flex; align-items: center; gap: 10px; }
#header-user  { font-size: 13px; opacity: .75; }

/* ── Main layout ─────────────────────────────────────────── */
main { max-width: 820px; margin: 0 auto; padding: 20px 14px;
       display: flex; flex-direction: column; gap: 18px; }

/* ── Cards ───────────────────────────────────────────────── */
.card { background: var(--surface); border-radius: var(--radius);
        padding: 22px; box-shadow: var(--shadow); }
.card h2 { font-size: 16px; font-weight: 700; margin-bottom: 18px; }
.section-header { display: flex; align-items: center;
                  justify-content: space-between; margin-bottom: 18px; }
.section-header h2 { margin-bottom: 0; }

/* ── Drop zone ───────────────────────────────────────────── */
.drop-zone {
  border: 2px dashed var(--border); border-radius: var(--radius);
  padding: 36px 20px; text-align: center; cursor: pointer;
  background: #fafbff; transition: border-color .2s, background .2s;
}
.drop-zone.drag-over { border-color: var(--accent); background: #eef0fb; }
.drop-content { pointer-events: none; }
.drop-icon  { font-size: 32px; display: block; margin-bottom: 10px; }
.drop-zone p { color: var(--text-sub); font-size: 13px; margin-bottom: 6px; }
.drop-hint  { font-size: 11px; margin: 4px 0 12px; }

/* ── File list ───────────────────────────────────────────── */
.file-list { margin-top: 14px; display: flex; flex-direction: column; gap: 7px; }
.file-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 13px; background: #f0f1f8; border-radius: var(--radius-sm);
  font-size: 13px;
}
.file-icon   { font-size: 16px; flex-shrink: 0; }
.file-name   { flex: 1; font-weight: 500; overflow: hidden;
               text-overflow: ellipsis; white-space: nowrap; }
.file-remove { border: none; background: none; cursor: pointer;
               color: var(--text-sub); font-size: 14px; padding: 0; flex-shrink: 0; }
.upload-actions { margin-top: 14px; display: flex; gap: 10px; }

/* ── Progress ────────────────────────────────────────────── */
.progress-bar  { height: 7px; background: var(--border); border-radius: 4px;
                  overflow: hidden; margin-bottom: 14px; }
.progress-fill { height: 100%; background: var(--accent); border-radius: 4px;
                  width: 0%; transition: width .4s ease; }
.progress-fill.running { animation: shimmer 1.8s infinite; }
@keyframes shimmer {
  0%   { opacity: 1; }
  50%  { opacity: .65; }
  100% { opacity: 1; }
}
.progress-log {
  background: #f7f8fc; border-radius: var(--radius-sm);
  padding: 11px 14px; max-height: 200px; overflow-y: auto;
  font-size: 12px; font-family: 'SF Mono', 'Consolas', monospace;
  color: var(--text-sub); display: flex; flex-direction: column; gap: 3px;
}
.log-line        { line-height: 1.45; }
.log-line.done   { color: var(--success); font-weight: 700; }
.log-line.error  { color: var(--danger); font-weight: 700; }

/* ── Series grid ─────────────────────────────────────────── */
.series-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px,1fr)); gap: 11px; }
.series-card {
  background: #f7f8ff; border: 1.5px solid #c5cae9;
  border-radius: var(--radius-sm); padding: 15px;
  display: flex; flex-direction: column; gap: 7px;
}
.series-card h3    { font-size: 13px; font-weight: 700; color: var(--primary);
                     line-height: 1.35; }
.series-count      { font-size: 11px; color: var(--text-sub); }
.series-card .btn  { margin-top: auto; font-size: 12px; padding: 7px 12px; }

/* ── History ─────────────────────────────────────────────── */
#history-list { display: flex; flex-direction: column; gap: 9px; }
.history-item  {
  padding: 13px 15px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); cursor: pointer; transition: background .15s;
}
.history-item:hover { background: #f4f5ff; }
.hist-header  { display: flex; justify-content: space-between;
                align-items: baseline; margin-bottom: 4px; }
.hist-title   { font-size: 13px; font-weight: 700; }
.hist-date    { font-size: 11px; color: var(--text-sub); }
.hist-files   { font-size: 11px; color: var(--text-sub); }
.empty-msg    { color: var(--text-sub); font-size: 13px;
                text-align: center; padding: 18px 0; }

/* ── Settings ────────────────────────────────────────────── */
.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 18px; }
.setting-item  { padding: 11px 13px; background: #f7f8fc; border-radius: var(--radius-sm); }
.setting-label { font-size: 11px; font-weight: 700; color: var(--text-sub);
                 text-transform: uppercase; letter-spacing: .5px; margin-bottom: 3px; }
.setting-value { font-size: 12px; font-family: monospace; word-break: break-all; }
.setting-value.ok  { color: var(--success); }
.setting-value.nok { color: var(--danger); }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 580px) {
  .login-card { padding: 32px 22px; }
  .card { padding: 16px; }
  .series-grid { grid-template-columns: 1fr 1fr; }
  .settings-grid { grid-template-columns: 1fr; }
  .header-title { font-size: 14px; }
}
@media (max-width: 360px) {
  .series-grid { grid-template-columns: 1fr; }
}