:root {
    --bg: #0d0f14;
    --surface: #151821;
    --surface-2: #1b1f2b;
    --border: #262c3b;
    --border-soft: #1f2431;
    --txt: #e7eaf2;
    --muted: #8b93a9;
    --accent: #6c7bff;
    --accent-strong: #5563f5;
    --accent-soft: rgba(108, 123, 255, .12);
    --success: #35d49a;
    --success-soft: rgba(53, 212, 154, .12);
    --warn: #f5b83d;
    --warn-soft: rgba(245, 184, 61, .12);
    --danger: #ff6b6b;
    --danger-soft: rgba(255, 107, 107, .12);
    --radius: 14px;
    --radius-sm: 9px;
    --sidebar-w: 236px;
    --shadow: 0 8px 30px rgba(0, 0, 0, .35);
    font-size: 15px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--txt);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

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

/* ---------- Layout ---------- */
.sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--sidebar-w);
    background: linear-gradient(180deg, #12151d 0%, #0e1017 100%);
    border-right: 1px solid var(--border-soft);
    display: flex;
    flex-direction: column;
    padding: 18px 12px;
    z-index: 50;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 4px 10px 20px;
}

.brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 11px;
    background: linear-gradient(135deg, var(--accent) 0%, #9a6cff 100%);
    display: grid;
    place-items: center;
    font-weight: 800;
    font-size: 19px;
    color: #fff;
    box-shadow: 0 4px 16px rgba(108, 123, 255, .35);
}

.brand-txt { font-weight: 700; font-size: 17px; line-height: 1.1; }
.brand-txt span { display: block; font-size: 11px; font-weight: 500; color: var(--muted); letter-spacing: .4px; }

.nav { display: flex; flex-direction: column; gap: 3px; flex: 1; }

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--muted);
    font-weight: 500;
    font-size: 14px;
    transition: background .15s, color .15s;
}

.nav-item svg { width: 19px; height: 19px; flex: none; }
.nav-item:hover { background: var(--surface); color: var(--txt); text-decoration: none; }
.nav-item.active { background: var(--accent-soft); color: var(--accent); }
.nav-item.logout:hover { background: var(--danger-soft); color: var(--danger); }
.sidebar-foot { border-top: 1px solid var(--border-soft); padding-top: 10px; }

.main { margin-left: var(--sidebar-w); min-height: 100vh; display: flex; flex-direction: column; }

.topbar {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 28px;
    border-bottom: 1px solid var(--border-soft);
    background: rgba(13, 15, 20, .85);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 40;
}

.topbar h1 { margin: 0; font-size: 19px; font-weight: 700; flex: 1; }
.topbar-user { color: var(--muted); font-size: 13px; font-weight: 500; }
.burger { display: none; }

.content { padding: 26px 28px 60px; max-width: 1400px; width: 100%; }

/* ---------- Cards / KPI ---------- */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 24px; }

.kpi {
    background: var(--surface);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 18px 20px;
    position: relative;
    overflow: hidden;
}

.kpi::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 3px; background: var(--accent); }
.kpi.k-success::before { background: var(--success); }
.kpi.k-warn::before { background: var(--warn); }
.kpi.k-danger::before { background: var(--danger); }
.kpi-label { font-size: 12px; text-transform: uppercase; letter-spacing: .6px; color: var(--muted); font-weight: 600; }
.kpi-value { font-size: 26px; font-weight: 800; margin-top: 6px; font-variant-numeric: tabular-nums; }
.kpi-sub { font-size: 12px; color: var(--muted); margin-top: 4px; }

.card {
    background: var(--surface);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    margin-bottom: 22px;
}

.card-head {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-soft);
}

.card-head h2 { margin: 0; font-size: 15px; font-weight: 700; flex: 1; }
.card-body { padding: 20px; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; }

table.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }

.tbl thead th {
    text-align: left;
    padding: 11px 14px;
    font-size: 11.5px;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: var(--muted);
    font-weight: 600;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.tbl tbody td { padding: 11px 14px; border-bottom: 1px solid var(--border-soft); vertical-align: middle; }
.tbl tbody tr:hover { background: rgba(255, 255, 255, .02); }
.tbl tbody tr:last-child td { border-bottom: none; }
.tbl .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.tbl .c { text-align: center; }

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 11px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge.paid { background: var(--success-soft); color: var(--success); }
.badge.pending { background: var(--warn-soft); color: var(--warn); }
.badge.late { background: var(--danger-soft); color: var(--danger); }
.badge.devis { background: var(--accent-soft); color: var(--accent); }

/* ---------- Forms ---------- */
label { display: block; font-size: 12.5px; font-weight: 600; color: var(--muted); margin-bottom: 6px; }

input[type="text"], input[type="number"], input[type="date"], input[type="password"],
input[type="email"], select, textarea {
    width: 100%;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--txt);
    padding: 9px 12px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color .15s, box-shadow .15s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

input[type="date"] { color-scheme: dark; }
select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%); background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 32px; }
textarea { resize: vertical; min-height: 80px; }

.form-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 16px; }
.col-12 { grid-column: span 12; }
.col-8 { grid-column: span 8; }
.col-6 { grid-column: span 6; }
.col-4 { grid-column: span 4; }
.col-3 { grid-column: span 3; }
.col-2 { grid-column: span 2; }

.check { display: flex; align-items: center; gap: 10px; cursor: pointer; font-size: 14px; color: var(--txt); font-weight: 500; }
.check input { width: 17px; height: 17px; accent-color: var(--accent); cursor: pointer; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 18px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: filter .15s, background .15s, transform .05s;
    text-decoration: none !important;
    white-space: nowrap;
}

.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent-strong); color: #fff; box-shadow: 0 4px 14px rgba(108, 123, 255, .3); }
.btn-primary:hover { filter: brightness(1.12); }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--txt); }
.btn-ghost:hover { background: var(--surface-2); }
.btn-success { background: var(--success); color: #05261b; }
.btn-success:hover { filter: brightness(1.08); }
.btn-danger { background: var(--danger-soft); color: var(--danger); border-color: transparent; }
.btn-danger:hover { background: rgba(255, 107, 107, .22); }
.btn-sm { padding: 6px 12px; font-size: 12.5px; border-radius: 8px; }
.btn-icon { padding: 7px; border-radius: 8px; background: transparent; border: 1px solid var(--border); color: var(--muted); cursor: pointer; display: inline-flex; }
.btn-icon:hover { color: var(--danger); border-color: var(--danger); }
.btn-icon svg { width: 15px; height: 15px; }

/* ---------- Utilities ---------- */
.flex { display: flex; align-items: center; gap: 12px; }
.flex-end { display: flex; justify-content: flex-end; gap: 12px; }
.spacer { flex: 1; }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }
.mb0 { margin-bottom: 0; }
.mt { margin-top: 18px; }
.right { text-align: right; }
.mono { font-variant-numeric: tabular-nums; }
.txt-success { color: var(--success); }
.txt-danger { color: var(--danger); }
.txt-warn { color: var(--warn); }
.hidden { display: none !important; }

.search-input { max-width: 280px; }

.comment-dot {
    display: inline-grid;
    place-items: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 12px;
    cursor: help;
}

/* ---------- Pay inline widget ---------- */
.pay-widget { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.pay-widget input[type="date"] { width: 150px; padding: 6px 9px; font-size: 13px; }
.pay-widget select { width: 115px; padding: 6px 28px 6px 9px; font-size: 13px; }

/* ---------- Facture builder ---------- */
.el-row { display: grid; grid-template-columns: 1fr 90px 110px 110px 40px; gap: 10px; align-items: center; margin-bottom: 10px; }
.el-row .el-total { text-align: right; font-weight: 600; font-variant-numeric: tabular-nums; }
.el-head { display: grid; grid-template-columns: 1fr 90px 110px 110px 40px; gap: 10px; font-size: 11.5px; text-transform: uppercase; color: var(--muted); font-weight: 600; letter-spacing: .5px; margin-bottom: 8px; }

.recap { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px 20px; }
.recap-line { display: flex; justify-content: space-between; padding: 5px 0; font-size: 14px; }
.recap-line.total { border-top: 1px solid var(--border); margin-top: 8px; padding-top: 12px; font-weight: 800; font-size: 17px; }

.days-pill { padding: 5px 12px; border-radius: 999px; font-size: 12.5px; font-weight: 600; background: var(--accent-soft); color: var(--accent); }
.days-pill.ok { background: var(--success-soft); color: var(--success); }
.days-pill.ko { background: var(--danger-soft); color: var(--danger); }

/* ---------- Modal ---------- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(5, 6, 10, .7);
    backdrop-filter: blur(3px);
    display: none;
    place-items: center;
    z-index: 100;
    padding: 20px;
}

.modal-overlay.open { display: grid; }

.modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
}

.modal-head { display: flex; align-items: center; padding: 16px 22px; border-bottom: 1px solid var(--border-soft); }
.modal-head h3 { margin: 0; font-size: 16px; flex: 1; }
.modal-close { background: none; border: none; color: var(--muted); font-size: 22px; cursor: pointer; line-height: 1; }
.modal-body { padding: 20px 22px; }
.modal-foot { display: flex; justify-content: flex-end; gap: 10px; padding: 16px 22px; border-top: 1px solid var(--border-soft); }

/* ---------- Toast ---------- */
#toast-zone { position: fixed; top: 20px; right: 20px; z-index: 200; display: flex; flex-direction: column; gap: 10px; }

.toast {
    background: var(--surface);
    border: 1px solid var(--border);
    border-left: 3px solid var(--success);
    border-radius: var(--radius-sm);
    padding: 13px 18px;
    font-size: 14px;
    box-shadow: var(--shadow);
    animation: slidein .25s ease;
    max-width: 360px;
}

.toast.err { border-left-color: var(--danger); }
@keyframes slidein { from { transform: translateX(30px); opacity: 0; } to { transform: none; opacity: 1; } }

/* ---------- Login ---------- */
.login-page { display: grid; place-items: center; min-height: 100vh; background: radial-gradient(1000px 500px at 70% -10%, rgba(108, 123, 255, .13), transparent), var(--bg); padding: 20px; }

.login-card { width: 100%; max-width: 380px; background: var(--surface); border: 1px solid var(--border-soft); border-radius: 18px; padding: 38px 34px; box-shadow: var(--shadow); }
.login-card .brand { justify-content: center; padding-bottom: 26px; }
.login-card .form-group { margin-bottom: 16px; }
.login-err { background: var(--danger-soft); color: var(--danger); border-radius: var(--radius-sm); padding: 10px 14px; font-size: 13.5px; margin-bottom: 16px; }

/* ---------- Chart container ---------- */
.chart-box { position: relative; height: 420px; }

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
    .sidebar { transform: translateX(-100%); transition: transform .25s ease; }
    .sidebar.open { transform: none; box-shadow: var(--shadow); }
    .main { margin-left: 0; }
    .burger { display: flex; flex-direction: column; gap: 4px; background: none; border: none; cursor: pointer; padding: 6px; }
    .burger span { width: 20px; height: 2px; background: var(--txt); border-radius: 2px; }
    .content { padding: 18px 16px 50px; }
    .col-8, .col-6, .col-4, .col-3, .col-2 { grid-column: span 12; }
    .el-row, .el-head { grid-template-columns: 1fr 70px 90px 90px 34px; }
}