/* Design tokens */
:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --success: #059669;
  --danger: #dc2626;
  --warning: #d97706;
  --text: #0f172a;
  --text-soft: #475569;
  --text-mute: #94a3b8;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,.12);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.16);
  --current: #2563eb;
  --previous: #7c3aed;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', system-ui, sans-serif; background: #f1f5f9; color: var(--text); min-height: 100vh; }
a { color: var(--primary); }
button { font-family: inherit; }

/* Login */
.login-overlay { position: fixed; inset: 0; background: linear-gradient(135deg, #312e81 0%, #4f46e5 50%, #6366f1 100%); display: flex; align-items: center; justify-content: center; z-index: 1000; padding: 20px; }
.login-card { background: var(--surface); border-radius: 20px; box-shadow: var(--shadow-lg); width: 100%; max-width: 420px; padding: 40px 36px; }
.login-brand { text-align: center; margin-bottom: 28px; }
.login-icon { width: 64px; height: 64px; border-radius: 16px; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 28px; margin: 0 auto 16px; }
.login-brand h1 { font-size: 1.5rem; font-weight: 800; color: var(--text); }
.login-subtitle { font-size: .88rem; color: var(--text-soft); margin-top: 4px; }
.login-body { display: flex; flex-direction: column; gap: 14px; }
.login-hint { font-size: .85rem; color: var(--text-soft); line-height: 1.5; }
.login-btn { width: 100%; justify-content: center; gap: 10px; padding: 13px; font-size: .95rem; }
.login-error { background: #fef2f2; border: 1px solid #fecaca; color: #dc2626; border-radius: var(--radius-sm); padding: 10px 14px; font-size: .84rem; }
.login-footnote { font-size: .78rem; color: var(--text-mute); text-align: center; line-height: 1.5; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 7px; padding: 9px 16px; border-radius: var(--radius-sm); font-size: .84rem; font-weight: 600; border: 1.5px solid transparent; cursor: pointer; transition: all .15s; white-space: nowrap; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn-secondary { background: var(--surface); color: var(--text); border-color: var(--border-strong); }
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); }
.btn-ghost { background: transparent; color: var(--text-soft); border-color: transparent; }
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }
.btn-warning { background: #fef3c7; color: #92400e; border-color: #fde68a; }
.btn-warning:hover { background: #fde68a; }

/* Header */
.app-header { background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; box-shadow: var(--shadow-sm); }
.header-inner { max-width: 1280px; margin: 0 auto; padding: 0 24px; height: 64px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-icon { width: 38px; height: 38px; border-radius: 10px; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 17px; }
.brand-title { font-size: 1.05rem; font-weight: 800; color: var(--text); line-height: 1.1; }
.brand-subtitle { font-size: .72rem; color: var(--text-soft); }
.header-actions { display: flex; align-items: center; gap: 12px; }

/* Status pill */
.status-pill { display: inline-flex; align-items: center; gap: 6px; padding: 5px 12px; border-radius: 20px; font-size: .75rem; font-weight: 600; background: var(--surface-2); border: 1px solid var(--border); color: var(--text-soft); }
.status-idle .fa-circle { color: var(--text-mute); }
.status-ready .fa-circle { color: var(--success); }
.status-error .fa-circle { color: var(--danger); }
.status-working .fa-circle { color: var(--warning); }

/* Gmail status */
.gmail-status { display: inline-flex; align-items: center; gap: 6px; padding: 5px 10px; border-radius: 20px; font-size: .75rem; font-weight: 600; border: 1px solid var(--border); background: var(--surface-2); }
.gmail-disconnected { color: var(--text-mute); }
.gmail-connected { color: var(--success); border-color: #a7f3d0; background: #f0fdf4; }
.gmail-link-btn { background: none; border: none; color: var(--primary); font-size: .75rem; font-weight: 600; cursor: pointer; padding: 0; text-decoration: underline; }

/* User menu */
.user-menu { position: relative; }
.user-pill { display: flex; align-items: center; gap: 8px; background: none; border: 1.5px solid var(--border); border-radius: 20px; padding: 5px 12px 5px 6px; cursor: pointer; transition: border-color .15s; }
.user-pill:hover { border-color: var(--primary); }
.user-pill-avatar { width: 28px; height: 28px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 12px; }
.user-pill-name { font-size: .82rem; font-weight: 600; color: var(--text); }
.user-pill-caret { font-size: .65rem; color: var(--text-soft); }
.user-dropdown { position: absolute; right: 0; top: calc(100% + 8px); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-md); min-width: 220px; z-index: 200; }
.user-dropdown[aria-hidden="true"] { display: none; }
.user-dropdown-head { padding: 14px 16px; }
.user-dropdown-name { font-weight: 700; font-size: .9rem; color: var(--text); }
.user-dropdown-email { font-size: .78rem; color: var(--text-soft); margin-top: 2px; }
.user-dropdown-divider { height: 1px; background: var(--border); }
.user-dropdown-item { width: 100%; display: flex; align-items: center; gap: 9px; padding: 11px 16px; background: none; border: none; font-size: .85rem; color: var(--text); cursor: pointer; text-align: left; transition: background .1s; }
.user-dropdown-item:hover { background: var(--surface-2); }
.user-dropdown-item-danger { color: var(--danger); }
.user-dropdown-item-danger:hover { background: #fef2f2; }
.user-role-badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; margin-top: 4px; }
.role-manager { background: #ede9fe; color: #5b21b6; }
.role-admin { background: #fee2e2; color: #991b1b; }

/* Main layout */
main { max-width: 1280px; margin: 0 auto; padding: 28px 24px; display: flex; flex-direction: column; gap: 24px; }

/* Section titles */
.section-title { font-size: 1rem; font-weight: 700; color: var(--text); display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
.section-title i { color: var(--primary); }
.section-help { font-size: .82rem; color: var(--text-soft); line-height: 1.6; margin-bottom: 18px; }
.section-subtitle { font-size: .88rem; font-weight: 700; color: var(--text); display: flex; align-items: center; gap: 7px; margin-bottom: 12px; }

/* Upload section */
.upload-section, .controls-section, .report-section { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-sm); }
.upload-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.upload-card { border: 1.5px solid var(--border); border-radius: var(--radius-sm); padding: 16px; background: var(--surface-2); transition: border-color .15s; }
.upload-card.has-file { border-color: var(--success); background: #f0fdf4; }
.upload-card.optional { border-style: dashed; }
.upload-card-head { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 12px; }
.upload-card-head h3 { font-size: .88rem; font-weight: 700; color: var(--text); }
.upload-card-head p { font-size: .75rem; color: var(--text-soft); line-height: 1.5; margin-top: 3px; }
.upload-num { width: 24px; height: 24px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: .72rem; font-weight: 700; flex-shrink: 0; }
.optional-badge { display: inline-block; margin-left: 6px; padding: 1px 7px; background: #f0f9ff; color: #0369a1; border-radius: 8px; font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; }
.upload-drop { display: block; border: 1.5px dashed var(--border-strong); border-radius: var(--radius-sm); padding: 14px; text-align: center; cursor: pointer; transition: all .15s; background: var(--surface); }
.upload-drop:hover { border-color: var(--primary); background: #eef2ff; }
.upload-drop input[type="file"] { display: none; }
.upload-drop-inner { display: flex; flex-direction: column; align-items: center; gap: 6px; color: var(--text-soft); }
.upload-drop-inner i { font-size: 1.4rem; color: var(--primary); }
.upload-drop-text { font-size: .78rem; font-weight: 600; }
.upload-status { font-size: .75rem; color: var(--text-soft); margin-top: 8px; min-height: 18px; }
.upload-status.ok { color: var(--success); font-weight: 600; }
.upload-status.err { color: var(--danger); font-weight: 600; }

/* Controls */
.controls-row { display: flex; align-items: flex-end; gap: 16px; flex-wrap: wrap; }
.control { display: flex; flex-direction: column; gap: 5px; }
.control-grow { flex: 1; min-width: 160px; }
.control label { font-size: .75rem; font-weight: 700; color: var(--text-soft); text-transform: uppercase; letter-spacing: .06em; }
.control input, .control select { padding: 9px 12px; border: 1.5px solid var(--border-strong); border-radius: var(--radius-sm); font-size: .88rem; font-family: inherit; color: var(--text); background: var(--surface); transition: border-color .15s; }
.control input:focus, .control select:focus { outline: none; border-color: var(--primary); }
.control-actions { display: flex; align-items: flex-end; gap: 8px; }
.error-box { background: #fef2f2; border: 1px solid #fecaca; color: var(--danger); border-radius: var(--radius-sm); padding: 10px 14px; font-size: .84rem; margin-top: 12px; }
.error-box.hidden { display: none; }

/* Report section */
.report-header { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; margin-bottom: 16px; }
.export-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.mail-client-picker { padding: 8px 10px; border: 1.5px solid var(--border-strong); border-radius: var(--radius-sm); font-size: .82rem; font-family: inherit; color: var(--text); background: var(--surface); cursor: pointer; }
.period-labels { display: flex; flex-wrap: wrap; gap: 10px; font-size: .78rem; margin-bottom: 18px; padding: 10px 14px; background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.tables-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 900px) { .tables-grid { grid-template-columns: 1fr; } }
.table-wrap { border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.table-title { display: flex; align-items: center; gap: 9px; padding: 12px 16px; background: var(--surface-2); border-bottom: 1px solid var(--border); font-size: .88rem; font-weight: 700; color: var(--text); }
.table-pill { display: inline-block; padding: 2px 9px; border-radius: 10px; font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; }
.table-pill-current { background: #dbeafe; color: #1d4ed8; }
.table-pill-previous { background: #ede9fe; color: #5b21b6; }
.table-scroll { overflow-x: auto; }
.report-table { width: 100%; border-collapse: collapse; font-size: .82rem; white-space: nowrap; }
.report-table th { padding: 8px 12px; text-align: center; font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--text-soft); border-bottom: 2px solid var(--border); background: var(--surface-2); position: sticky; top: 0; }
.report-table th:first-child { text-align: left; }
.report-table td { padding: 7px 12px; text-align: center; border-bottom: 1px solid var(--border); color: var(--text); }
.report-table td:first-child { text-align: left; font-weight: 600; color: var(--text); white-space: normal; min-width: 130px; }
.report-table tr:last-child td { border-bottom: none; }
.report-table tr:hover td { background: var(--surface-2); }
.report-table .row-derived td { background: #fffbeb; color: #92400e; }
.report-table .row-derived td:first-child { color: #b45309; font-style: italic; }
.report-table .row-net td { color: var(--success); font-weight: 700; }
.report-table .cell-zero { color: var(--text-mute); }

/* Summary */
.summary-section { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border); }
.summary-content { font-size: .88rem; color: var(--text-soft); line-height: 1.7; }
.summary-content strong { color: var(--text); }

/* App footer */
.app-footer { text-align: center; font-size: .75rem; color: var(--text-mute); padding: 16px 0 8px; display: flex; justify-content: center; gap: 6px; }

/* Modals */
.modal-overlay { position: fixed; inset: 0; background: rgba(15,23,42,.5); display: flex; align-items: center; justify-content: center; z-index: 500; padding: 20px; }
.modal-overlay.hidden { display: none; }
.modal-card { background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow-lg); width: 100%; max-width: 680px; max-height: 90vh; display: flex; flex-direction: column; overflow: hidden; }
.modal-card-md { max-width: 560px; }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 18px 22px; border-bottom: 1px solid var(--border); }
.modal-header h3 { font-size: 1rem; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.modal-close { background: none; border: none; font-size: 1.1rem; color: var(--text-soft); cursor: pointer; padding: 4px; border-radius: 6px; }
.modal-close:hover { background: var(--surface-2); color: var(--text); }
.modal-body { padding: 20px 22px; overflow-y: auto; flex: 1; display: flex; flex-direction: column; gap: 14px; }
.modal-hint { font-size: .82rem; color: var(--text-soft); line-height: 1.6; }
.modal-footer { padding: 14px 22px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }
.modal-test-banner { background: #fffbeb; border: 1px solid #fde68a; border-radius: var(--radius-sm); padding: 10px 14px; font-size: .82rem; color: #92400e; display: flex; align-items: flex-start; gap: 8px; }

/* Email preview modal */
.email-preview-fields { display: flex; flex-direction: column; gap: 8px; padding: 12px; background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.email-field { display: flex; gap: 10px; align-items: baseline; font-size: .82rem; }
.email-label { font-weight: 700; color: var(--text-soft); min-width: 60px; }
.email-value { color: var(--text); }
.email-body-wrap { display: flex; flex-direction: column; gap: 6px; }
.email-label-block { font-size: .75rem; font-weight: 700; color: var(--text-soft); text-transform: uppercase; letter-spacing: .06em; }
.email-body-frame { width: 100%; height: 420px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: #fff; }

/* User management */
.user-add-form { margin-bottom: 20px; }
.user-add-row { display: flex; gap: 8px; flex-wrap: wrap; }
.user-add-input { flex: 1; min-width: 140px; padding: 9px 12px; border: 1px solid var(--border-strong); border-radius: var(--radius-sm); font-size: 13px; font-family: inherit; }
.user-add-select { padding: 9px 12px; border: 1px solid var(--border-strong); border-radius: var(--radius-sm); font-size: 13px; font-family: inherit; }
.user-form-error { font-size: .8rem; color: var(--danger); margin-top: 6px; }
.user-list-wrap { border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.user-list-head { padding: 10px 14px; font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--text-soft); background: var(--surface-2); border-bottom: 1px solid var(--border); }
.user-list-table { width: 100%; border-collapse: collapse; font-size: .84rem; }
.user-list-table th { padding: 9px 14px; text-align: left; font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--text-soft); border-bottom: 1px solid var(--border); background: var(--surface-2); }
.user-list-table td { padding: 9px 14px; border-bottom: 1px solid var(--border); color: var(--text); }
.user-list-table tr:last-child td { border-bottom: none; }
.user-list-table tr:hover td { background: var(--surface-2); }

/* Hidden utility */
.hidden { display: none !important; }