/* ============================================================
   Web CMS v2  —  style.css
   ============================================================ */

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

:root {
    --font:     system-ui, -apple-system, 'Segoe UI', sans-serif;
    --mono:     'SFMono-Regular', Consolas, monospace;

    --bg:       #f4f5f7;
    --surface:  #ffffff;
    --border:   #e2e5ea;
    --muted:    #6b7280;
    --text:     #1c2030;
    --text2:    #4b5563;

    --primary:     #4f46e5;
    --primary-h:   #4338ca;
    --primary-lt:  #eef2ff;

    /* Status colours */
    --pending-bg:   #f0fdf4;  --pending-bd:   #86efac;  --pending-tx:   #166534;
    --issued-bg:    #fffbeb;  --issued-bd:    #fcd34d;  --issued-tx:    #92400e;
    --sent-bg:      #eff6ff;  --sent-bd:      #93c5fd;  --sent-tx:      #1e40af;
    --overdue-bg:   #fef2f2;  --overdue-bd:   #fca5a5;  --overdue-tx:   #991b1b;
    --paid-bg:      #eeedfb;  --paid-bd:      #a19df9;  --paid-tx:      #524cd8;
    --cancelled-bg: #f9fafb;  --cancelled-bd: #d1d5db;  --cancelled-tx: #6b7280;
    --partial-bd:   #93c5fd;

    /* Sidebar */
    --sb-bg:  #1e2030;
    --sb-tx:  #a8afc8;
    --sb-ac:  #ffffff;
    --sb-w:   220px;

    --radius:    8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
    --shadow:    0 2px 8px rgba(0,0,0,.10);
}

html { font-size: 18px; }
body { font-family: var(--font); color: var(--text); background: var(--bg); line-height: 1.6; }
a    { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Auth pages ───────────────────────────────────────────── */
body.auth-page {
    display: flex; align-items: center; justify-content: center;
    min-height: 100vh; padding: 2rem 1rem;
}
.auth-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 2.25rem 2.5rem;
    width: 100%; max-width: 420px; box-shadow: var(--shadow);
}
.auth-logo   { font-size: 1.125rem; font-weight: 700; letter-spacing: .07em; color: var(--primary); text-transform: uppercase; margin-bottom: 1.5rem; }
.auth-title  { font-size: 1.75rem; font-weight: 600; margin-bottom: .25rem; }
.auth-sub    { color: var(--muted); font-size: 1.125rem; margin-bottom: 1.5rem; }

/* ── App shell ────────────────────────────────────────────── */
.app { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sb-w); background: var(--sb-bg); color: var(--sb-tx);
    display: flex; flex-direction: column;
    position: fixed; top: 0; left: 0; bottom: 0; z-index: 100;
    overflow-y: auto;
}
.sidebar img {
    width: 100%;
}
.sidebar__brand {
    padding: 1.25rem 1.25rem .9rem; font-size: 1rem; font-weight: 700;
    letter-spacing: .08em; text-transform: uppercase; color: var(--sb-ac);
    border-bottom: 1px solid rgba(255,255,255,.07); flex-shrink: 0;
}
.nav { list-style: none; padding: .6rem 0; flex: 1; }
.nav__divider { height: 1px; background: rgba(255,255,255,.07); margin: .5rem 0; }
.nav__link {
    display: flex; align-items: center; gap: .55rem;
    padding: .5rem 1.25rem; font-size: 1.094rem; color: var(--sb-tx);
    transition: background .15s, color .15s;
}
.nav__link:hover { background: rgba(255,255,255,.06); color: #fff; text-decoration: none; }
.nav__link--active { background: rgba(79,70,229,.35); color: #fff; font-weight: 500; }
.nav__icon { font-size: 1.125rem; opacity: .75; flex-shrink: 0; }

.sidebar__user {
    padding: .85rem 1.25rem 1rem; border-top: 1px solid rgba(255,255,255,.07);
    flex-shrink: 0;
}
.sidebar__user-name  { font-size: 1.025rem; font-weight: 600; color: #fff; margin-bottom: .2rem; }
.sidebar__user-links { font-size: 0.938rem; color: var(--sb-tx); }
.sidebar__user-links a, .link-btn {
    color: var(--sb-tx); text-decoration: none; background: none;
    border: none; cursor: pointer; font-size: 0.938rem; font-family: var(--font);
    padding: 0;
}
.sidebar__user-links a:hover, .link-btn:hover { color: #fff; }

.main { margin-left: var(--sb-w); flex: 1; display: flex; flex-direction: column; min-width: 0; }

/* ── Topbar ───────────────────────────────────────────────── */
.topbar {
    background: var(--surface); border-bottom: 1px solid var(--border);
    padding: .85rem 1.75rem;
    display: flex; align-items: center; justify-content: space-between;
    position: sticky; top: 0; z-index: 50;
}
.topbar__title { font-size: 1.312rem; font-weight: 600; }

.content { padding: 1.75rem; flex: 1; }

/* ── Month nav ────────────────────────────────────────────── */
.month-nav { display: flex; align-items: center; gap: .65rem; font-size: 1.125rem; }
.month-nav a {
    padding: .3rem .6rem; border-radius: var(--radius);
    border: 1px solid var(--border); color: var(--text2); font-size: 1rem;
}
.month-nav a:hover { background: #f3f4f6; text-decoration: none; }
.month-nav strong  { font-weight: 600; font-size: 1.25rem; }

/* ── Summary cards ────────────────────────────────────────── */
.summary-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem; margin-bottom: 1.75rem;
}
.summary-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 1rem 1.25rem; box-shadow: var(--shadow-sm);
}
.summary-card__label {
    font-size: 0.9rem; font-weight: 600; text-transform: uppercase;
    letter-spacing: .06em; color: var(--muted); margin-bottom: .35rem;
}
.summary-card__value {
    font-size: 1.75rem; font-weight: 600;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.val--green  { color: #15803d; }
.val--red    { color: #b91c1c; }
.val--amber  { color: #b45309; }

/* ── Badges ───────────────────────────────────────────────── */
.badge {
    display: inline-block; padding: .18rem .55rem; border-radius: 20px;
    font-size: 0.875rem; font-weight: 600; letter-spacing: .03em;
    border: 1px solid transparent; white-space: nowrap;
}
.badge--pending   { background: var(--pending-bg);   border-color: var(--pending-bd);   color: var(--pending-tx); }
.badge--issued    { background: var(--issued-bg);    border-color: var(--issued-bd);    color: var(--issued-tx); }
.badge--overdue   { background: var(--overdue-bg);   border-color: var(--overdue-bd);   color: var(--overdue-tx); }
.badge--paid      { background: var(--paid-bg);      border-color: var(--paid-bd);      color: var(--paid-tx); }
.badge--cancelled { background: var(--cancelled-bg); border-color: var(--cancelled-bd); color: var(--cancelled-tx); }
.badge--sent      { background: var(--sent-bg);      border-color: var(--sent-bd);      color: var(--sent-tx); }

/* ── Table ────────────────────────────────────────────────── */
.table-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); }
table { width: 100%; border-collapse: collapse; font-size: 1.094rem; }
thead th {
    background: #f8f9fb; padding: .65rem 1rem; text-align: left;
    font-size: 0.9rem; font-weight: 600; text-transform: uppercase;
    letter-spacing: .05em; color: var(--muted);
    border-bottom: 1px solid var(--border); white-space: nowrap;
}
tbody tr { border-bottom: 1px solid var(--border); transition: background .1s; }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: #fafbfc; }
td { padding: .7rem 1rem; vertical-align: middle; }

/* Row tints */
tr.row--overdue   { background: #fff8f8; }
tr.row--issued    { background: #fffef5; }
tr.row--paid      { background: #f6fef9; }
tr.row--pending   { }

/* Left border accent */
tr.row--pending   td:first-child { border-left: 3px solid var(--pending-bd); }
tr.row--issued    td:first-child { border-left: 3px solid var(--issued-bd); }
tr.row--overdue   td:first-child { border-left: 3px solid var(--overdue-bd); }
tr.row--paid      td:first-child { border-left: 3px solid var(--paid-bd); }
tr.row--cancelled td:first-child { border-left: 3px solid var(--cancelled-bd); }
tr.row--sent      td:first-child { border-left: 3px solid #93c5fd; }

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
    display: inline-flex; align-items: center; gap: .4rem;
    padding: .45rem .95rem; border-radius: var(--radius);
    font-size: 1.094rem; font-weight: 500; cursor: pointer;
    border: 1px solid transparent; transition: background .15s, border-color .15s;
    white-space: nowrap; text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn--primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn--primary:hover { background: var(--primary-h); }
.btn--ghost   { background: transparent; color: var(--text2); border-color: var(--border); }
.btn--ghost:hover { background: #f3f4f6; }
.btn--danger  { background: #dc2626; color: #fff; border-color: #dc2626; }
.btn--danger:hover { background: #b91c1c; }
.btn--sm      { padding: .3rem .65rem; font-size: 1rem; }
.btn--full    { width: 100%; justify-content: center; }
.btn--issue   { background: var(--issued-bg);  color: var(--issued-tx);  border-color: var(--issued-bd); }
.btn--paid    { background: var(--paid-bg);    color: var(--paid-tx);    border-color: var(--paid-bd); }
.btn--sent    { background: #eff6ff; color: #1e40af; border-color: #93c5fd; }

/* ── Alerts ───────────────────────────────────────────────── */
.alert { padding: .7rem 1rem; border-radius: var(--radius); font-size: 1.094rem; margin-bottom: 1rem; border: 1px solid transparent; }
.alert--success { background: #f0fdf4; border-color: #86efac; color: #166534; }
.alert--danger  { background: #fef2f2; border-color: #fca5a5; color: #991b1b; }
.alert--info    { background: #eff6ff; border-color: #93c5fd; color: #1e3a8a; }
.alert--warning { background: #fffbeb; border-color: #fcd34d; color: #92400e; }

/* ── Forms ────────────────────────────────────────────────── */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 1.025rem; font-weight: 500; color: var(--text2); margin-bottom: .35rem; }
.hint { font-size: 0.975rem; color: var(--muted); margin-top: .3rem; }
input[type=text], input[type=email], input[type=number], input[type=password],
input[type=tel], input[type=date], select, textarea {
    width: 100%; padding: .5rem .75rem; border: 1px solid var(--border);
    border-radius: var(--radius); font-family: var(--font); font-size: 1.125rem;
    color: var(--text); background: var(--surface); transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus {
    outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,70,229,.12);
}
textarea { resize: vertical; min-height: 80px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; }

/* ── Cards ────────────────────────────────────────────────── */
.card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow-sm); margin-bottom: 1.5rem;
}
.card__title {
    font-size: 1.188rem; font-weight: 600; margin-bottom: 1rem;
    padding-bottom: .6rem; border-bottom: 1px solid var(--border);
    display: flex; align-items: center; justify-content: space-between;
}

/* ── Page header ──────────────────────────────────────────── */
.page-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 1.25rem;
}
.page-header h2 { font-size: 1.312rem; font-weight: 600; }

/* ── Utilities ────────────────────────────────────────────── */
.text-muted  { color: var(--muted); }
.text-right  { text-align: right; }
.text-center { text-align: center; }
.text-mono   { font-family: var(--mono); }
.nowrap      { white-space: nowrap; }
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--muted); font-size: 1.125rem; }

/* ── Mobile nav ───────────────────────────────────────────── */
.hamburger {
    display: none; flex-direction: column; justify-content: center;
    gap: 5px; width: 36px; height: 36px; background: transparent;
    border: 1px solid var(--border); border-radius: var(--radius);
    cursor: pointer; padding: 0 8px; flex-shrink: 0; margin-right: .75rem;
}
.hamburger span { display: block; height: 2px; background: var(--text2); border-radius: 2px; }
.hamburger:hover span { background: var(--text); }

.nav-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 99; }
.nav-overlay--visible { display: block; }

@media (max-width: 768px) {
    .hamburger { display: flex; }
    .sidebar { transform: translateX(-100%); transition: transform .25s ease; z-index: 100; position: fixed; }
    .sidebar--open { transform: translateX(0); }
    .main { margin-left: 0; }
    .form-row, .form-row-3 { grid-template-columns: 1fr; }
    .summary-grid { grid-template-columns: 1fr 1fr; }
    .table-wrap { overflow-x: auto; }
    .content { padding: 1rem; }
}