*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --black: #000;
    --white: #fff;
    --gray-100: #f5f5f5;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525252;
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    font-family: var(--font);
    color: var(--black);
    background: var(--white);
    font-size: 14px;
    line-height: 1.5;
}

a { color: var(--black); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Buttons */
.btn {
    display: inline-block;
    background: var(--black);
    color: var(--white);
    border: 1px solid var(--black);
    padding: 7px 16px;
    font-size: 13px;
    cursor: pointer;
    font-family: var(--font);
    transition: opacity 0.15s;
}
.btn:hover { opacity: 0.8; text-decoration: none; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-full { width: 100%; }
.btn-outline {
    background: var(--white);
    color: var(--black);
    border: 1px solid var(--black);
}
.btn-outline:hover { background: var(--gray-100); }
.btn-danger { background: var(--black); }

/* Nav */
.nav {
    border-bottom: 1px solid var(--gray-200);
    background: var(--white);
    position: sticky;
    top: 0;
    z-index: 100;
}
.nav-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    height: 48px;
    gap: 24px;
}
.nav-brand {
    font-weight: 700;
    font-size: 16px;
    letter-spacing: -0.5px;
}
.nav-links { display: flex; gap: 16px; }
.nav-links a {
    font-size: 13px;
    padding: 4px 0;
    border-bottom: 2px solid transparent;
}
.nav-links a.active { border-bottom-color: var(--black); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.nav-user { font-size: 13px; color: var(--gray-500); }
.nav-toggle { display: none; background: none; border: none; font-size: 20px; cursor: pointer; }

/* Main */
.main { max-width: 1400px; margin: 0 auto; padding: 20px; }

/* Login */
.login-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}
.login-box {
    width: 320px;
    padding: 32px;
    border: 1px solid var(--gray-200);
}
.login-box h1 {
    font-size: 20px;
    margin-bottom: 24px;
    text-align: center;
    letter-spacing: -0.5px;
}

/* Forms */
.form-group { margin-bottom: 14px; }
.form-group label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
input, select, textarea {
    width: 100%;
    padding: 7px 10px;
    border: 1px solid var(--gray-300);
    font-size: 14px;
    font-family: var(--font);
    background: var(--white);
    color: var(--black);
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--black);
}
textarea { resize: vertical; min-height: 60px; }

.form-row { display: flex; gap: 12px; }
.form-row .form-group { flex: 1; }

.form-inline { display: flex; gap: 8px; align-items: end; }
.form-inline .form-group { margin-bottom: 0; }

/* Alert */
.alert {
    padding: 8px 12px;
    border: 1px solid var(--black);
    margin-bottom: 16px;
    font-size: 13px;
}

/* Dashboard */
.dashboard h2 { margin-bottom: 20px; font-size: 18px; }
.dashboard-cards { display: flex; gap: 16px; flex-wrap: wrap; }
.dash-card {
    border: 1px solid var(--gray-200);
    padding: 24px;
    min-width: 200px;
    flex: 1;
    text-align: center;
    transition: border-color 0.15s;
}
.dash-card:hover { border-color: var(--black); text-decoration: none; }
.dash-card-title { font-weight: 700; font-size: 14px; text-transform: uppercase; letter-spacing: 0.5px; }
.dash-card-count { font-size: 36px; font-weight: 700; margin: 8px 0 4px; }
.dash-card-label { font-size: 12px; color: var(--gray-500); }

/* Board Layout */
.board-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 10px;
}
.board-header h2 { font-size: 18px; }
.board-filters, .filter-row {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 16px;
}
.board-filters select, .board-filters input,
.filter-row select, .filter-row input {
    width: auto;
    min-width: 120px;
    padding: 5px 8px;
    font-size: 13px;
}

/* Table */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
thead th {
    text-align: left;
    padding: 8px 10px;
    border-bottom: 2px solid var(--black);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
    cursor: pointer;
    user-select: none;
}
thead th:hover { background: var(--gray-100); }
thead th.sorted-asc::after { content: ' \25B2'; font-size: 9px; }
thead th.sorted-desc::after { content: ' \25BC'; font-size: 9px; }
tbody td {
    padding: 8px 10px;
    border-bottom: 1px solid var(--gray-200);
    vertical-align: top;
}
tbody tr { cursor: pointer; }
tbody tr:hover { background: var(--gray-100); }

.status-badge {
    display: inline-block;
    padding: 2px 8px;
    font-size: 11px;
    border: 1px solid var(--gray-400);
    white-space: nowrap;
}

/* Group header in board */
.group-header {
    background: var(--gray-100);
    font-weight: 700;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.group-header td { padding: 10px; border-bottom: 1px solid var(--gray-300); }

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 16px;
    font-size: 13px;
}
.pagination-info { color: var(--gray-500); }
.pagination-btns { display: flex; gap: 4px; }
.pagination-btns button {
    background: var(--white);
    border: 1px solid var(--gray-300);
    padding: 4px 10px;
    font-size: 12px;
    cursor: pointer;
}
.pagination-btns button:hover { border-color: var(--black); }
.pagination-btns button.active { background: var(--black); color: var(--white); border-color: var(--black); }
.pagination-btns button:disabled { opacity: 0.3; cursor: default; }

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 200;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 40px 20px;
    overflow-y: auto;
}
.modal {
    background: var(--white);
    width: 100%;
    max-width: 640px;
    border: 1px solid var(--gray-200);
    max-height: calc(100vh - 80px);
    overflow-y: auto;
}
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-200);
}
.modal-header h3 { font-size: 16px; }
.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    line-height: 1;
    color: var(--black);
}
.modal-body { padding: 20px; }
.modal-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    justify-content: flex-end;
}

/* Tabs */
.tabs { display: flex; border-bottom: 1px solid var(--gray-200); margin-bottom: 16px; }
.tab {
    padding: 8px 16px;
    font-size: 13px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
    font-family: var(--font);
    color: var(--gray-500);
}
.tab.active { color: var(--black); border-bottom-color: var(--black); }

/* Comments */
.comments-list { margin-bottom: 12px; }
.comment-item {
    padding: 8px 0;
    border-bottom: 1px solid var(--gray-100);
    font-size: 13px;
}
.comment-meta { font-size: 11px; color: var(--gray-500); margin-bottom: 2px; }
.comment-form { display: flex; gap: 8px; }
.comment-form textarea { min-height: 40px; flex: 1; }

/* Audit Log */
.audit-list { font-size: 12px; }
.audit-item {
    padding: 6px 0;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-600);
}
.audit-time { color: var(--gray-400); font-size: 11px; }

/* Toast */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--black);
    color: var(--white);
    padding: 10px 20px;
    font-size: 13px;
    z-index: 300;
}

/* Admin */
.admin-nav { display: flex; gap: 12px; margin-bottom: 20px; }
.admin-nav a { font-size: 13px; padding: 6px 0; border-bottom: 2px solid transparent; }
.admin-nav a.active { border-bottom-color: var(--black); }

/* Mobile */
@media (max-width: 768px) {
    .nav-links { display: none; position: absolute; top: 48px; left: 0; right: 0; background: var(--white); border-bottom: 1px solid var(--gray-200); flex-direction: column; padding: 10px 20px; }
    .nav-links.open { display: flex; }
    .nav-toggle { display: block; }
    .nav-right { display: none; }

    .board-header { flex-direction: column; align-items: stretch; }
    .board-filters, .filter-row { flex-direction: column; }
    .board-filters select, .board-filters input,
    .filter-row select, .filter-row input { width: 100%; }

    .form-row { flex-direction: column; gap: 0; }

    .dashboard-cards { flex-direction: column; }
    .dash-card { min-width: auto; }

    table { font-size: 12px; }
    thead th, tbody td { padding: 6px 8px; }

    .modal { max-width: 100%; margin: 0; }
    .modal-overlay { padding: 10px; }
}

/* Utility */
.text-right { text-align: right; }
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.hidden { display: none; }
.nowrap { white-space: nowrap; }