:root {
    --color-primary: #1E40AF;
    --color-primary-soft: #EFF4FF;
    --color-accent: #F59E0B;
    --color-ok: #16A34A;
    --color-ok-soft: #EAF7EE;
    --color-warning: #F59E0B;
    --color-warning-soft: #FEF6E7;
    --color-over: #DC2626;
    --color-over-soft: #FDECEC;

    --color-bg: #F8FAFC;
    --color-surface: #FFFFFF;
    --color-surface-2: #F1F5F9;
    --color-border: #E2E8F0;
    --color-text: #0F172A;
    --color-muted: #475569;
    --color-faint: #94A3B8;

    --radius-sm: 8px;
    --radius: 14px;
    --radius-lg: 20px;
    --shadow-card: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 12px rgba(15, 23, 42, 0.05);
    --shadow-pop: 0 12px 32px rgba(15, 23, 42, 0.16);
    font-size: 16px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-primary: #60A5FA;
        --color-primary-soft: rgba(96, 165, 250, 0.12);
        --color-accent: #FBBF24;
        --color-ok: #4ADE80;
        --color-ok-soft: rgba(74, 222, 128, 0.12);
        --color-warning: #FBBF24;
        --color-warning-soft: rgba(251, 191, 36, 0.12);
        --color-over: #F87171;
        --color-over-soft: rgba(248, 113, 113, 0.12);

        --color-bg: #0B1220;
        --color-surface: #131B2C;
        --color-surface-2: #1B2437;
        --color-border: #263349;
        --color-text: #F1F5F9;
        --color-muted: #94A3B8;
        --color-faint: #64748B;

        --shadow-card: 0 1px 2px rgba(0,0,0,0.3), 0 1px 16px rgba(0,0,0,0.25);
        --shadow-pop: 0 16px 40px rgba(0,0,0,0.5);
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-weight: 700; letter-spacing: -0.01em; margin: 0; }
h3 { font-size: 0.95rem; color: var(--color-text); margin-bottom: 0.85rem; }

button, input, select { font-family: inherit; }

*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ---------- Login ---------- */

#login-screen {
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background:
        radial-gradient(circle at 15% 10%, var(--color-primary-soft), transparent 45%),
        var(--color-bg);
}

.login-card {
    width: 100%;
    max-width: 380px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-pop);
    padding: 2.25rem 2rem;
    text-align: center;
}

.login-mark {
    width: 52px; height: 52px;
    border-radius: 14px;
    background: var(--color-primary-soft);
    color: var(--color-primary);
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 1rem;
}

.login-card h1 { font-size: 1.35rem; }
.login-sub { color: var(--color-muted); font-size: 0.9rem; margin: 0.35rem 0 1.5rem; }
.login-card .field { margin-bottom: 0.85rem; }

/* ---------- Layout ---------- */

header.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 1.1rem;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 30;
}

.brand { display: flex; align-items: center; gap: 0.6rem; }
.brand-mark { color: var(--color-primary); display: flex; }
header.topbar h1 { font-size: 1.05rem; }

#lang-switch {
    min-height: 40px;
    padding: 0 0.7rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: var(--color-surface-2);
    color: var(--color-text);
    font-weight: 600;
    font-size: 0.8rem;
}

.tabbar {
    display: flex;
    gap: 0.25rem;
    padding: 0.5rem 0.75rem;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 57px;
    z-index: 20;
    overflow-x: auto;
}

.tab-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    min-height: 44px;
    padding: 0 0.75rem;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    color: var(--color-muted);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background-color 180ms ease, color 180ms ease;
    white-space: nowrap;
}

.tab-btn:hover { background: var(--color-surface-2); }
.tab-btn.active { background: var(--color-primary-soft); color: var(--color-primary); }

main { padding: 1rem 1rem 3rem; max-width: 960px; margin: 0 auto; }

.panel { display: none; }
.panel.active { display: block; animation: fade-in 220ms ease; }

@keyframes fade-in {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
    .panel.active { animation: none; }
    * { transition-duration: 0.01ms !important; }
}

/* ---------- Cards ---------- */

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    padding: 1.1rem;
    margin-bottom: 1rem;
}

.card-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.85rem;
    gap: 0.75rem;
}

.card-toolbar h3 { margin: 0; }

/* ---------- KPI ---------- */

.kpi-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.kpi-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    padding: 1.1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: border-color 200ms ease;
}

.kpi-label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.kpi-value {
    font-family: 'Fira Code', ui-monospace, monospace;
    font-size: 2.1rem;
    font-weight: 600;
    color: var(--color-text);
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
}

.kpi-unit { font-size: 0.95rem; color: var(--color-faint); font-weight: 500; }

.kpi-bar {
    height: 6px;
    border-radius: 999px;
    background: var(--color-surface-2);
    overflow: hidden;
}

.kpi-bar-fill {
    height: 100%;
    border-radius: 999px;
    background: var(--color-ok);
    width: 0%;
    transition: width 300ms ease, background-color 300ms ease;
}

.kpi-status {
    align-self: flex-start;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    background: var(--color-ok-soft);
    color: var(--color-ok);
}

.kpi-card.status-ok .kpi-bar-fill { background: var(--color-ok); }
.kpi-card.status-warning .kpi-bar-fill { background: var(--color-warning); }
.kpi-card.status-over .kpi-bar-fill { background: var(--color-over); }

.kpi-card.status-ok #kpi-status-badge, #kpi-status-badge.status-ok { background: var(--color-ok-soft); color: var(--color-ok); }
#kpi-status-badge.status-warning { background: var(--color-warning-soft); color: var(--color-warning); }
#kpi-status-badge.status-over { background: var(--color-over-soft); color: var(--color-over); }

/* ---------- Buttons & inputs ---------- */

button, .btn {
    min-height: 44px;
    min-width: 44px;
    padding: 0 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    transition: background-color 180ms ease, border-color 180ms ease, transform 120ms ease;
}

button:hover { border-color: var(--color-faint); }
button:active { transform: scale(0.98); }

button.primary { background: var(--color-primary); color: white; border-color: var(--color-primary); }
button.primary:hover { filter: brightness(1.08); }
button.danger { color: var(--color-over); border-color: var(--color-over-soft); background: var(--color-over-soft); }
button.icon-btn { padding: 0; width: 40px; height: 40px; min-width: 40px; }

input, select {
    min-height: 44px;
    padding: 0 0.7rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 0.9rem;
    width: 100%;
}

input:focus, select:focus { border-color: var(--color-primary); }

.field { margin-bottom: 0.85rem; }
.field label { display: block; font-size: 0.8rem; font-weight: 600; margin-bottom: 0.35rem; color: var(--color-muted); }

/* ---------- Tableau desktop ---------- */

.table-scroll { overflow-x: auto; }

table.sejours-table {
    width: 100%;
    border-collapse: collapse;
    display: none;
}

table.sejours-table th {
    text-align: left;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--color-faint);
    padding: 0 0.6rem 0.6rem;
}

table.sejours-table td {
    padding: 0.35rem 0.6rem;
    border-top: 1px solid var(--color-border);
}

table.sejours-table tr:hover td { background: var(--color-surface-2); }

table.sejours-table input, table.sejours-table select {
    min-height: 38px;
    border-color: transparent;
    background: transparent;
}

table.sejours-table input:hover, table.sejours-table select:hover { border-color: var(--color-border); }

.schengen-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.2rem 0.5rem;
    border-radius: 999px;
}

.schengen-badge.yes { background: var(--color-ok-soft); color: var(--color-ok); }
.schengen-badge.no { background: var(--color-surface-2); color: var(--color-faint); }

/* ---------- Cartes mobile ---------- */

.sejour-cards { display: flex; flex-direction: column; gap: 0.65rem; }

.sejour-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.85rem;
    background: var(--color-surface);
}

.sejour-card .row { display: flex; justify-content: space-between; padding: 0.2rem 0; font-size: 0.9rem; }
.sejour-card .row .k { color: var(--color-muted); font-size: 0.82rem; }
.sejour-card .actions { display: flex; gap: 0.5rem; margin-top: 0.6rem; }
.sejour-card .actions button { flex: 1; }

.empty-state {
    text-align: center;
    color: var(--color-faint);
    padding: 2rem 1rem;
    font-size: 0.9rem;
}

@media (min-width: 768px) {
    table.sejours-table { display: table; }
    .sejour-cards { display: none; }
}

/* ---------- Modale ---------- */

.modal-backdrop {
    position: fixed; inset: 0;
    background: rgba(8, 12, 20, 0.5);
    backdrop-filter: blur(2px);
    display: flex; align-items: flex-end;
    justify-content: center;
    z-index: 100;
    animation: fade-in 180ms ease;
}

@media (min-width: 768px) {
    .modal-backdrop { align-items: center; }
}

.modal {
    background: var(--color-surface);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    padding: 1.4rem;
    width: 100%;
    max-width: 460px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-pop);
}

@media (min-width: 768px) {
    .modal { border-radius: var(--radius-lg); }
}

.modal h3 { font-size: 1.05rem; margin-bottom: 1.1rem; }
.modal .actions { display: flex; gap: 0.5rem; justify-content: flex-end; margin-top: 1.1rem; }

.modal-confirm { max-width: 380px; }
.modal-confirm h3 { margin-bottom: 0.6rem; }
.confirm-body { color: var(--color-muted); font-size: 0.9rem; margin: 0; }

/* ---------- Graphique (viz) ---------- */

.chart-header {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.5rem;
    margin-bottom: 0.15rem;
}

.chart-header h3 { margin: 0; }

.chart-hint {
    font-size: 0.8rem;
    color: var(--color-faint);
    margin: 0 0 0.75rem;
}

.viz-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem;
}

.viz-legend-item {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.76rem;
    font-weight: 600;
    color: var(--color-muted);
}

.viz-legend-swatch { width: 14px; height: 3px; border-radius: 2px; display: inline-block; }
.swatch-line { background: var(--viz-line); height: 3px; }
.swatch-limit { background: var(--viz-over); height: 2px; }
.swatch-window { background: var(--viz-window-handle); width: 10px; height: 10px; border-radius: 3px; }

.chart-wrap {
    position: relative;
    touch-action: none;
    --viz-surface: var(--color-surface);
    --viz-line: var(--color-primary);
    --viz-grid: var(--color-border);
    --viz-axis: var(--color-border);
    --viz-crosshair: var(--color-faint);
    --viz-ok: var(--color-ok);
    --viz-warning: var(--color-warning);
    --viz-over: var(--color-over);
    --viz-window-fill: color-mix(in srgb, var(--color-primary) 7%, transparent);
    --viz-window-handle: var(--color-primary);
}

.viz-svg { width: 100%; height: 260px; display: block; cursor: crosshair; touch-action: none; }

.viz-gridline, .viz-threshold-line { shape-rendering: crispEdges; }
.viz-axis-label {
    font-size: 10.5px;
    font-weight: 600;
    fill: var(--color-faint);
    font-family: 'Inter', sans-serif;
}
.viz-threshold-label {
    font-size: 10.5px;
    font-weight: 700;
    fill: var(--color-over);
    font-family: 'Inter', sans-serif;
}
.viz-window-label {
    font-size: 10.5px;
    font-weight: 600;
    fill: var(--color-muted);
    font-family: 'Inter', sans-serif;
}
.viz-handle { cursor: grab; }
.viz-handle:active { cursor: grabbing; }
.viz-crosshair { pointer-events: none; }

.viz-tooltip {
    position: absolute;
    display: none;
    transform: translate(-50%, -115%);
    background: var(--color-text);
    color: var(--color-bg);
    border-radius: var(--radius-sm);
    padding: 0.5rem 0.65rem;
    font-size: 0.78rem;
    pointer-events: none;
    white-space: nowrap;
    z-index: 5;
    box-shadow: var(--shadow-pop);
}

.viz-tooltip-date { font-weight: 700; margin-bottom: 0.2rem; }
.viz-tooltip-row { display: flex; align-items: baseline; gap: 0.3rem; }
.viz-tooltip-swatch { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.viz-tooltip-value { font-family: 'Fira Code', monospace; font-weight: 700; font-size: 0.95rem; }
.viz-tooltip-unit { opacity: 0.75; font-size: 0.72rem; }
.viz-tooltip-remaining { opacity: 0.85; font-size: 0.74rem; margin-top: 0.1rem; }
.viz-tooltip-status {
    margin-top: 0.2rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
.viz-tooltip-status.status-ok { color: var(--color-ok); }
.viz-tooltip-status.status-warning { color: var(--color-warning); }
.viz-tooltip-status.status-over { color: var(--color-over); }

.chart-window-controls {
    display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 0.9rem;
}

.chart-window-controls .field { flex: 1; min-width: 140px; margin-bottom: 0; }

.error-banner {
    background: var(--color-over-soft);
    color: var(--color-over);
    padding: 0.65rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    display: none;
    font-size: 0.85rem;
    font-weight: 500;
}

.hidden { display: none !important; }

/* ---------- Calendrier ---------- */

.calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.calendar-header h3 { margin: 0; font-size: 1rem; text-transform: capitalize; }

.calendar-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    margin-bottom: 4px;
}

.calendar-weekdays span {
    text-align: center;
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-faint);
    padding-bottom: 0.35rem;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
}

.cal-day {
    position: relative;
    min-height: 58px;
    border-radius: var(--radius-sm);
    background: var(--color-surface-2);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    padding: 0.3rem 0.25rem;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-muted);
    overflow: hidden;
}

.cal-day.outside { opacity: 0.35; }

.cal-day.today {
    box-shadow: inset 0 0 0 2px var(--color-primary);
    color: var(--color-primary);
}

.cal-day.has-schengen {
    background: var(--color-ok-soft);
    color: var(--color-ok);
}

.cal-day.has-other {
    background: var(--color-primary-soft);
    color: var(--color-primary);
}

.cal-day-num {
    align-self: center;
    margin-bottom: 0.15rem;
}

.cal-day-trip {
    display: block;
    width: 100%;
    min-height: 0;
    font-family: inherit;
    font-size: 0.62rem;
    font-weight: 700;
    line-height: 1.25;
    color: inherit;
    background: rgba(0, 0, 0, 0.06);
    border: none;
    border-radius: 4px;
    padding: 0.1rem 0.28rem;
    margin-top: 1px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-align: left;
    cursor: pointer;
    transition: background-color 150ms ease;
}

.cal-day-trip:hover, .cal-day-trip:focus-visible {
    background: rgba(0, 0, 0, 0.16);
}

@media (prefers-color-scheme: dark) {
    .cal-day-trip { background: rgba(255, 255, 255, 0.1); }
    .cal-day-trip:hover, .cal-day-trip:focus-visible { background: rgba(255, 255, 255, 0.22); }
}

.calendar-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem;
    margin-top: 1rem;
    padding-top: 0.9rem;
    border-top: 1px solid var(--color-border);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.78rem;
    color: var(--color-muted);
}

.legend-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.dot-schengen { background: var(--color-ok); }
.dot-other { background: var(--color-primary); }
.dot-today { background: var(--color-surface); box-shadow: inset 0 0 0 2px var(--color-primary); }

@media (min-width: 640px) {
    .cal-day { font-size: 0.85rem; }
}