/* ============================================================
 * KCMS AI — application stylesheet
 * Self-contained: covers cards, forms, tables, badges, kpi,
 * pagination, modals, alerts, layout shells.
 * ============================================================ */

:root {
    --color-bg:        #f4f6fa;
    --color-surface:   #ffffff;
    --color-border:    #e3e6ec;
    --color-text:      #1f2734;
    --color-muted:     #6b7384;
    --color-primary:   #2b67d6;
    --color-primary-d: #1f4ea8;
    --color-success:   #0a7a4f;
    --color-warning:   #b97a00;
    --color-danger:    #c0392b;
    --color-info:      #1f6f9f;
    --color-secondary: #707782;

    --radius:    6px;
    --radius-sm: 4px;
    --shadow:    0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);

    --space:    1rem;
    --space-sm: .5rem;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
}
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 12px; background: rgba(0,0,0,.04); padding: 1px 4px; border-radius: 3px; }
hr { border: 0; border-top: 1px solid var(--color-border); margin: 1.5em 0; }
h1, h2, h3, h4 { margin: .5em 0; line-height: 1.3; }
h1 { font-size: 1.6rem; }
h3 { font-size: 1.05rem; margin: 0; }
h4 { font-size: .95rem; color: var(--color-muted); text-transform: uppercase; letter-spacing: .03em; }

/* -------------------------------------------------- layout */
.topbar {
    display: flex; align-items: center;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0 1.5rem;
    height: 56px;
    box-shadow: var(--shadow);
    position: sticky; top: 0; z-index: 100;
}
.topbar-brand { font-size: 1rem; }
.topbar-brand a { color: var(--color-text); text-decoration: none; }
.topbar-nav {
    display: flex; gap: .25rem; flex: 1; margin-left: 2rem;
    overflow-x: auto;
}
.topbar-nav .nav-link {
    padding: .5rem .85rem;
    color: var(--color-muted);
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-size: 13px;
    white-space: nowrap;
}
.topbar-nav .nav-link:hover { background: var(--color-bg); color: var(--color-text); text-decoration: none; }
.topbar-nav .nav-link.active { background: var(--color-primary); color: #fff; }
.topbar-user { display: flex; align-items: center; gap: .75rem; }

.main { max-width: 1400px; margin: 0 auto; padding: 1.5rem; }
.main-narrow { max-width: 480px; padding-top: 4rem; }
.footer { text-align: center; padding: 2rem 1rem 1rem; }

/* -------------------------------------------------- page header */
.page-header {
    display: flex; justify-content: space-between; align-items: flex-start;
    margin-bottom: 1.5rem;
}
.page-header h1 { margin: 0; }
.page-header p { margin: .25rem 0 0; }
.page-actions { display: flex; gap: .5rem; align-items: center; }

/* -------------------------------------------------- grid */
.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.gap-4 { gap: 1rem; }
@media (max-width: 900px) {
    .grid-cols-2, .grid-cols-3, .grid-cols-4 { grid-template-columns: 1fr; }
}

/* -------------------------------------------------- card */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 1rem;
}
.card-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: .75rem 1rem;
    border-bottom: 1px solid var(--color-border);
}
.card-body { padding: 1rem; }
.card-footer {
    padding: .75rem 1rem;
    border-top: 1px solid var(--color-border);
    background: #fafbfd;
}
.card.filters { padding: 1rem; }

/* -------------------------------------------------- KPI */
.kpi-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem;
    box-shadow: var(--shadow);
}
.kpi-label { font-size: 12px; color: var(--color-muted); text-transform: uppercase; letter-spacing: .04em; }
.kpi-value { font-size: 1.8rem; font-weight: 600; margin: .25rem 0; line-height: 1.1; }
.kpi-meta  { font-size: 12px; color: var(--color-muted); }

/* -------------------------------------------------- forms */
.form-row { display: flex; gap: 1rem; align-items: flex-start; flex-wrap: wrap; }
.form-row > .form-group { flex: 1; min-width: 0; }
.form-group { margin-bottom: 1rem; }
.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: .25rem;
    font-size: 13px;
}
.form-control {
    width: 100%;
    padding: .5rem .65rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background: #fff;
    color: var(--color-text);
    font-family: inherit;
    line-height: 1.4;
}
.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(43,103,214,.15);
}
.form-control[readonly] { background: var(--color-bg); color: var(--color-muted); }
textarea.form-control { resize: vertical; min-height: 64px; }
.form-hint { font-size: 12px; color: var(--color-muted); margin-top: .25rem; display: block; }
.switch-label { display: inline-flex; align-items: center; gap: .5rem; cursor: pointer; user-select: none; }

/* -------------------------------------------------- buttons */
.btn {
    display: inline-block;
    padding: .5rem 1rem;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
    font-family: inherit;
    line-height: 1.4;
    white-space: nowrap;
}
.btn:hover { text-decoration: none; opacity: .92; }
.btn-primary   { background: var(--color-primary);  color: #fff; }
.btn-primary:hover { background: var(--color-primary-d); }
.btn-secondary { background: #fff; color: var(--color-text); border-color: var(--color-border); }
.btn-danger    { background: var(--color-danger);   color: #fff; }
.btn-warning   { background: var(--color-warning);  color: #fff; }
.btn-success   { background: var(--color-success);  color: #fff; }
.btn-sm { padding: .3rem .6rem; font-size: 12px; }
.btn-xs { padding: .15rem .45rem; font-size: 11px; }

/* -------------------------------------------------- tables */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td {
    padding: .55rem .75rem;
    text-align: left;
    vertical-align: top;
    border-bottom: 1px solid var(--color-border);
    font-size: 13px;
}
.table th {
    font-weight: 600; font-size: 12px; color: var(--color-muted);
    text-transform: uppercase; letter-spacing: .03em;
    background: #fafbfd;
}
.table tbody tr:last-child td { border-bottom: 0; }
.table-hover tbody tr:hover { background: #f8f9fc; }
.table td.empty { text-align: center; color: var(--color-muted); padding: 2rem; }

/* -------------------------------------------------- badges */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 10px;
    background: #e1e4e9;
    color: #444;
    font-size: 11px;
    font-weight: 500;
    text-transform: lowercase;
    white-space: nowrap;
}
.badge-success   { background: #d4f5e2; color: var(--color-success); }
.badge-warning   { background: #fde9c4; color: var(--color-warning); }
.badge-danger    { background: #f8d3cd; color: var(--color-danger); }
.badge-info      { background: #cfe5f5; color: var(--color-info); }
.badge-secondary { background: #e1e4e9; color: var(--color-secondary); }

/* -------------------------------------------------- alerts */
.alert {
    padding: .75rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    border-left: 4px solid;
    font-size: 14px;
}
.alert-success { background: #ecf8f0; border-color: var(--color-success); color: var(--color-success); }
.alert-warning { background: #fff7e6; border-color: var(--color-warning); color: var(--color-warning); }
.alert-danger  { background: #fdedea; border-color: var(--color-danger);  color: var(--color-danger); }
.alert-info    { background: #e8f1f9; border-color: var(--color-info);    color: var(--color-info); }
.alert ul { margin: 0; padding-left: 1.2em; }

/* -------------------------------------------------- pagination */
.pagination {
    display: flex; align-items: center; justify-content: center; gap: .5rem;
    margin: 1.5rem 0;
}
.pagination .page-info { color: var(--color-muted); font-size: 13px; padding: 0 .75rem; }

/* -------------------------------------------------- text utilities */
.text-muted   { color: var(--color-muted); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger  { color: var(--color-danger); }
.text-info    { color: var(--color-info); }

/* -------------------------------------------------- auth pages */
.auth-card {
    margin: 4rem auto;
    max-width: 420px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 2rem;
}
.auth-card h1 { text-align: center; margin-top: 0; }

/* -------------------------------------------------- tabs */
.tabs {
    display: flex;
    gap: 0;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--color-border);
    overflow-x: auto;
    flex-wrap: wrap;
}
.tab {
    display: inline-block;
    padding: .65rem 1.25rem;
    color: var(--color-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;          /* overlap the .tabs border-bottom */
    transition: color .15s, border-color .15s, background .15s;
    white-space: nowrap;
}
.tab:hover {
    color: var(--color-text);
    background: rgba(43, 103, 214, .04);
    text-decoration: none;
}
.tab.tab-active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    background: rgba(43, 103, 214, .06);
}