/* ============================================================
   Simulateur Locataire vs Propriétaire — Zero Bullshit
   Style sobre, lisible, sans fioritures
   ============================================================ */

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

:root {
    --color-bg: #f8f8f6;
    --color-surface: #ffffff;
    --color-border: #e2e2de;
    --color-text: #1a1a18;
    --color-text-secondary: #6b6b66;
    --color-proprio: #1a1a18;   /* courbe propriétaire : noir */
    --color-loc: #c0392b;       /* courbe locataire : rouge ZBS */
    --color-accent: #1a1a18;
    --color-positive: #27ae60;
    --color-negative: #c0392b;
    --font: 'Inter', system-ui, -apple-system, sans-serif;
    --radius: 6px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08);
}

html { font-size: 14px; }
body { font-family: var(--font); background: var(--color-bg); color: var(--color-text); }

/* ===== HEADER ===== */
.site-header {
    background: var(--color-text);
    color: #fff;
    padding: 10px 24px;
}
.header-inner { display: flex; align-items: center; gap: 16px; }
.site-logo { color: #fff; font-weight: 700; font-size: 1rem; text-decoration: none; letter-spacing: -0.02em; }
.site-tagline { color: rgba(255,255,255,0.5); font-size: 0.8rem; }

/* ===== LAYOUT PRINCIPAL ===== */
.simulator-layout {
    display: grid;
    grid-template-columns: 320px 1fr 280px;
    grid-template-rows: auto;
    min-height: calc(100vh - 44px);
    gap: 0;
}

/* ===== PANNEAU GAUCHE ===== */
.params-panel {
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    overflow-y: auto;
    height: calc(100vh - 44px);
    position: sticky;
    top: 44px;
    padding-bottom: 32px;
}

.params-header {
    padding: 20px 20px 12px;
    border-bottom: 1px solid var(--color-border);
}
.params-header h2 { font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text-secondary); }

/* ===== ACCORDÉONS ===== */
.accordion { border-bottom: 1px solid var(--color-border); }

.accordion-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 20px;
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
    text-align: left;
}
.accordion-toggle:hover { background: var(--color-bg); }
.accordion-icon { font-size: 1rem; }
.chevron { margin-left: auto; font-size: 0.7rem; color: var(--color-text-secondary); }

.accordion-body { padding: 4px 20px 16px; }

/* ===== CHAMPS ===== */
.field-group { margin-top: 12px; }
.field-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 5px;
}
.unit { font-weight: 400; color: var(--color-text-secondary); }

.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

input[type="number"] {
    width: 100%;
    padding: 7px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font);
    font-size: 0.9rem;
    background: var(--color-bg);
    color: var(--color-text);
    -moz-appearance: textfield;
}
input[type="number"]:focus { outline: 2px solid var(--color-text); border-color: transparent; }
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; }

.slider-with-value {
    display: grid;
    grid-template-columns: 1fr 70px auto;
    align-items: center;
    gap: 8px;
}
.slider-with-value .unit { white-space: nowrap; font-size: 0.82rem; color: var(--color-text-secondary); }

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: var(--color-border);
    border-radius: 2px;
    cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px; height: 16px;
    border-radius: 50%;
    background: var(--color-text);
    cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
    width: 16px; height: 16px;
    border-radius: 50%;
    background: var(--color-text);
    border: none;
    cursor: pointer;
}

.field-hint { font-size: 0.78rem; color: var(--color-text-secondary); margin-top: 6px; line-height: 1.5; }

.taeg-display {
    margin-top: 10px;
    padding: 8px 10px;
    background: var(--color-bg);
    border-radius: var(--radius);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}
.taeg-display strong { color: var(--color-text); }

/* ===== SCÉNARIOS MACRO ===== */
.scenario-tabs {
    display: flex;
    gap: 4px;
    margin-top: 12px;
}
.scenario-btn {
    flex: 1;
    padding: 7px 4px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-bg);
    font-family: var(--font);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    color: var(--color-text-secondary);
    text-align: center;
    transition: all 0.15s;
}
.scenario-btn.active {
    background: var(--color-text);
    color: #fff;
    border-color: var(--color-text);
}

.macro-customise { margin-top: 12px; font-size: 0.85rem; }
.toggle-label { display: flex; align-items: center; gap: 8px; cursor: pointer; }

.macro-table { margin-top: 12px; overflow-x: auto; }
.macro-table table { width: 100%; border-collapse: collapse; font-size: 0.78rem; }
.macro-table th { text-align: center; padding: 4px 2px; color: var(--color-text-secondary); font-weight: 600; }
.macro-table td { padding: 4px 2px; text-align: center; }
.macro-table td:first-child { text-align: left; font-weight: 600; color: var(--color-text-secondary); padding-right: 6px; }
.macro-input { width: 48px; padding: 4px 4px; font-size: 0.78rem; text-align: center; }

/* ===== HORIZON ===== */
.horizon-section {
    padding: 16px 20px;
}
.horizon-section label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 8px;
}

/* ===== SECTION CENTRALE ===== */
.chart-section {
    padding: 28px 32px;
    display: flex;
    flex-direction: column;
}

.page-hero { text-align: center; margin-bottom: 24px; }
.page-hero h1 { font-size: 1.6rem; font-weight: 700; letter-spacing: -0.03em; }
.hero-subtitle { margin-top: 8px; color: var(--color-text-secondary); font-size: 0.95rem; }

.chart-wrapper {
    position: relative;
    width: 100%;
    flex: 1;
    min-height: 320px;
    max-height: 420px;
}
.chart-loading {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    background: rgba(255,255,255,0.8);
    border-radius: var(--radius);
    display: none;
}

.chart-legend {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 12px;
    font-size: 0.82rem;
}
.legend-item { display: flex; align-items: center; gap: 6px; }
.legend-proprio::before { content: ''; display: inline-block; width: 20px; height: 2px; background: var(--color-proprio); }
.legend-loc::before { content: ''; display: inline-block; width: 20px; height: 2px; background: var(--color-loc); }

/* ===== MÉTHODO ===== */
.methodo-accordion {
    margin-top: 24px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}
.methodo-accordion .accordion-toggle {
    border-radius: var(--radius);
    font-size: 0.85rem;
}
.methodo-body {
    padding: 0 20px 16px;
}
.methodo-body p {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-top: 10px;
}
.methodo-body strong { color: var(--color-text); }

/* ===== PANNEAU DROITE ===== */
.result-panel {
    background: var(--color-surface);
    border-left: 1px solid var(--color-border);
    padding: 24px 20px;
    overflow-y: auto;
    height: calc(100vh - 44px);
    position: sticky;
    top: 44px;
}

.result-verdict {
    text-align: center;
    padding: 20px 16px;
    background: var(--color-bg);
    border-radius: var(--radius);
    margin-bottom: 20px;
}
.verdict-label { font-size: 0.8rem; color: var(--color-text-secondary); line-height: 1.5; }
.verdict-value {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.04em;
    margin-top: 8px;
    color: var(--color-text);
}

/* Tableau résultats */
.result-table { font-size: 0.82rem; }
.result-table-header {
    display: grid;
    grid-template-columns: 1fr 68px 68px;
    gap: 4px;
    padding: 6px 0;
    border-bottom: 2px solid var(--color-text);
    font-weight: 700;
    font-size: 0.78rem;
    text-align: right;
}
.result-table-header span:first-child { text-align: left; }

.result-row {
    display: grid;
    grid-template-columns: 1fr 68px 68px;
    gap: 4px;
    padding: 7px 0;
    border-bottom: 1px solid var(--color-border);
    align-items: center;
}
.result-row span:first-child { color: var(--color-text-secondary); line-height: 1.4; }
.val-loc, .val-proprio { text-align: right; font-variant-numeric: tabular-nums; font-size: 0.8rem; }
.val-proprio { font-weight: 600; }

.result-row-total { border-top: 2px solid var(--color-text); border-bottom: none; margin-top: 4px; }
.result-row-total span:first-child { font-weight: 700; color: var(--color-text); }
.val-total { font-weight: 700; font-size: 0.9rem; }

/* Mensualités */
.mensualite-display {
    margin-top: 20px;
    padding: 14px 14px;
    background: var(--color-bg);
    border-radius: var(--radius);
}
.mensualite-item { display: flex; justify-content: space-between; align-items: center; padding: 5px 0; border-bottom: 1px solid var(--color-border); }
.mensualite-item:last-child { border-bottom: none; }
.mensualite-delta { padding-top: 8px; }
.mens-label { font-size: 0.78rem; color: var(--color-text-secondary); }
.mens-val { font-size: 0.85rem; font-weight: 600; font-variant-numeric: tabular-nums; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1100px) {
    .simulator-layout {
        grid-template-columns: 280px 1fr 240px;
    }
}

@media (max-width: 800px) {
    .simulator-layout {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
    }
    .params-panel, .result-panel {
        position: static;
        height: auto;
        border: none;
        border-bottom: 1px solid var(--color-border);
    }
    .chart-section { padding: 20px 16px; }
}