/* ============================================
   ROI CALCULATOR — PureTools
   All classes namespaced .roi-*
   ============================================ */

.roi-calculator {
    max-width: 1100px;
    margin: 0 auto;
}

/* ===== Top row: mode toggle + currency ===== */
.roi-top-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1rem;
    align-items: end;
    margin-bottom: 1.5rem;
}

.roi-mode-toggle {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.4rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.3rem;
    width: fit-content;
}

.roi-mode-btn {
    padding: 0.65rem 1.25rem;
    min-height: 44px;
    background: transparent;
    border: none;
    border-radius: calc(var(--radius) - 4px);
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.roi-mode-btn:hover { color: var(--text); }

.roi-mode-btn.active {
    background: var(--primary);
    color: var(--on-primary);
    box-shadow: 0 1px 4px rgba(var(--primary-rgb), 0.3);
}

.roi-currency-group { margin-bottom: 0; min-width: 180px; }

/* ===== Main layout ===== */
.roi-layout {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 1.5rem;
    align-items: start;
}

/* ===== Input card ===== */
.roi-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.roi-card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin: 0 0 0.1rem;
}

/* Prefixed inputs */
.roi-input-wrap {
    display: flex;
    align-items: stretch;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    overflow: hidden;
    transition: var(--transition);
}

.roi-input-wrap:focus-within { border-color: var(--primary); }

.roi-prefix {
    padding: 0 0.875rem;
    display: flex;
    align-items: center;
    background: var(--bg);
    border-right: 1px solid var(--border);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    white-space: nowrap;
    user-select: none;
}

.roi-prefixed-input {
    border: none !important;
    border-radius: 0 !important;
    flex: 1;
    min-width: 0;
}

.roi-prefixed-input:focus { outline: none; box-shadow: none; }

/* Duration row */
.roi-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.roi-hint {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
}

.roi-hint-inline {
    display: inline;
}

/* Adjustments */
.roi-adj-section {
    border-top: 1px solid var(--border);
    padding-top: 0.9rem;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.roi-adj-title {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin: 0 0 0.1rem;
}

.roi-toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.roi-toggle-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text);
    cursor: pointer;
    flex: 1;
}

.roi-toggle-check {
    width: 1rem;
    height: 1rem;
    accent-color: var(--primary);
    cursor: pointer;
    flex-shrink: 0;
}

.roi-adj-input {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.roi-small-input {
    width: 72px !important;
    text-align: right;
    padding-right: 0.4rem !important;
    font-size: 0.875rem !important;
}

.roi-unit {
    font-size: 0.8rem;
    color: var(--text-muted);
    white-space: nowrap;
}

/* Error */
.roi-error {
    font-size: 0.85rem;
    color: var(--danger);
    min-height: 1.1em;
    margin: 0;
}

/* ===== Results column ===== */
.roi-results-col {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.roi-empty {
    background: var(--surface);
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    padding: 2.5rem 1.5rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* ===== Hero card ===== */
.roi-hero-card {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius);
    padding: 1.75rem 1.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.roi-hero-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 80% 20%, rgba(255,255,255,.12) 0%, transparent 60%);
    pointer-events: none;
}

.roi-hero-eyebrow {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255,255,255,.75);
    margin: 0 0 0.4rem;
}

.roi-hero-num {
    font-size: 3.25rem;
    font-weight: 800;
    line-height: 1;
    color: var(--on-primary);
    display: block;
    margin-bottom: 0.4rem;
    font-variant-numeric: tabular-nums;
}

.roi-hero-sub {
    font-size: 0.85rem;
    color: rgba(255,255,255,.75);
    margin: 0;
}

/* ===== 4-metric grid ===== */
.roi-metrics-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.roi-metric-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.1rem;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.roi-metric-label {
    font-size: 0.775rem;
    color: var(--text-muted);
    font-weight: 500;
    line-height: 1.3;
}

.roi-metric-val {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text);
    font-variant-numeric: tabular-nums;
}

.roi-metric-val.roi-positive { color: var(--success); }
.roi-metric-val.roi-negative { color: var(--danger); }
.roi-metric-val.roi-neutral  {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
}

/* ===== Summary card ===== */
.roi-summary-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.9rem 1.1rem;
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    margin-top: 0.5rem;
}

.roi-summary-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.5rem;
}

.roi-summary-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    flex: 1;
}

.roi-summary-val {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
}

.roi-summary-val.roi-positive { color: var(--success); }
.roi-summary-val.roi-negative { color: var(--danger); }

/* ===== Stress-test table ===== */
.roi-stress-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    margin-top: 0.5rem;
}

.roi-stress-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.9rem 1.1rem 0.7rem;
    border-bottom: 1px solid var(--border);
}

.roi-stress-header h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text);
    margin: 0;
}

.roi-stress-btns {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

.roi-stress-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.75rem;
    min-height: 32px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: calc(var(--radius) - 2px);
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.775rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.roi-stress-btn:hover {
    background: var(--bg);
    color: var(--text);
    border-color: var(--primary);
}

.roi-table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.roi-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

.roi-table th {
    padding: 0.5rem 0.85rem;
    text-align: right;
    font-weight: 600;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.roi-table th:first-child { text-align: left; }

.roi-table td {
    padding: 0.5rem 0.85rem;
    text-align: right;
    color: var(--text);
    border-bottom: 1px solid var(--border);
    font-variant-numeric: tabular-nums;
}

.roi-table td:first-child { text-align: left; font-weight: 500; }
.roi-table tr:last-child td { border-bottom: none; }
.roi-table tr:hover td { background: var(--bg); }

/* ===== Copy action ===== */
.roi-actions {
    display: flex;
    gap: 0.75rem;
    padding-top: 0.25rem;
}

.roi-copy-btn {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    min-height: 44px;
    padding: 0 1.25rem;
    font-size: 0.875rem;
}

.roi-export-btn {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    min-height: 44px;
    padding: 0 1.25rem;
    font-size: 0.875rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-muted);
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.roi-export-btn:hover {
    background: var(--bg);
    color: var(--text);
    border-color: var(--primary);
}

.roi-reset-btn {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    min-height: 44px;
    padding: 0 1.25rem;
    font-size: 0.875rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-muted);
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    margin-left: auto;
}

.roi-reset-btn:hover {
    background: rgba(var(--danger-rgb, 239,68,68), 0.08);
    color: var(--danger);
    border-color: var(--danger);
}

/* ===== Responsive ===== */
@media (max-width: 960px) {
    .roi-layout { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .roi-top-row { grid-template-columns: 1fr; }
    .roi-mode-toggle { width: 100%; grid-template-columns: 1fr 1fr; }
    .roi-currency-group { width: 100%; }
    .roi-row-2 { grid-template-columns: 1fr 1fr; }
    .roi-metrics-grid { grid-template-columns: 1fr 1fr; }
    .roi-hero-num { font-size: 2.4rem; }
    .roi-actions { flex-direction: column; }
    .roi-copy-btn, .roi-export-btn { width: 100%; justify-content: center; }
    .roi-stress-header { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
    .roi-stress-btns { width: 100%; }
    .roi-stress-btn { flex: 1; justify-content: center; }
}