/* ═══════════════════════════════════════════════════════════════════════════
 * investment.css — Investment Calculator Styles
 * Namespace: inv-* (all custom rules prefixed to avoid conflicts)
 * File: assets/css/investment.css
 * ═══════════════════════════════════════════════════════════════════════════ */

/* ── Tab Mode Switcher ───────────────────────────────────────────────────── */
.inv-mode-tabs {
    display: flex;
    gap: 4px;
    background: var(--clr-bg-muted);
    border-radius: 10px;
    padding: 4px;
    margin-bottom: 20px;
    width: fit-content;
}

.inv-tab {
    padding: 7px 22px;
    border: none;
    background: transparent;
    border-radius: 7px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--clr-text-secondary);
    cursor: pointer;
    transition: background 0.18s, color 0.18s, box-shadow 0.18s;
    white-space: nowrap;
}

.inv-tab:hover {
    color: var(--clr-text-primary);
    background: var(--clr-bg);
}

.inv-tab--active {
    background: var(--clr-bg);
    color: var(--clr-accent-dark);
    font-weight: 600;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.09);
}

/* ── Panel Visibility ────────────────────────────────────────────────────── */
.inv-panel {
    display: block;
}

.inv-panel--hidden {
    display: none;
}

/* ── Inputs Grid ─────────────────────────────────────────────────────────── */
.inv-inputs-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px 18px;
}

@media (max-width: 580px) {
    .inv-inputs-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
}

/* ── Input Groups ────────────────────────────────────────────────────────── */
.inv-input-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.inv-input-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--clr-text-primary);
    line-height: 1.3;
}

.inv-input-hint {
    font-size: 0.7rem;
    font-weight: 400;
    color: var(--clr-text-muted);
    background: var(--clr-bg-muted);
    padding: 1px 6px;
    border-radius: 4px;
    margin-left: auto;
    white-space: nowrap;
}

.inv-input-wrap {
    display: flex;
    align-items: center;
    border: 1.5px solid var(--clr-border);
    border-radius: 8px;
    background: var(--clr-bg);
    transition: border-color 0.16s, box-shadow 0.16s;
    overflow: hidden;
}

.inv-input-wrap:focus-within {
    border-color: var(--clr-accent);
    box-shadow: var(--shadow-focus);
}

.inv-input-wrap--select {
    /* Select has its own internal padding handling */
}

.inv-input-prefix,
.inv-input-suffix {
    padding: 0 10px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--clr-text-muted);
    background: var(--clr-bg-muted);
    border-right: 1.5px solid var(--clr-border);
    align-self: stretch;
    display: flex;
    align-items: center;
    user-select: none;
    white-space: nowrap;
    flex-shrink: 0;
}

.inv-input-suffix {
    border-right: none;
    border-left: 1.5px solid var(--clr-border);
}

.inv-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    padding: 9px 11px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--clr-text-primary);
    width: 100%;
    min-width: 0;
    -moz-appearance: textfield;
}

.inv-input::-webkit-inner-spin-button,
.inv-input::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.inv-select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M2.5 4.5L6 8l3.5-3.5' stroke='%2394a3b8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 11px center;
    padding-right: 32px !important;
    cursor: pointer;
}

.inv-input-desc {
    font-size: 0.7125rem;
    color: var(--clr-text-muted);
    line-height: 1.4;
}

/* ── Action Buttons ──────────────────────────────────────────────────────── */
.inv-btn-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.inv-submit-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    justify-content: center;
    min-width: 140px;
}

.inv-clear-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    border: 1.5px solid var(--clr-border);
    border-radius: 8px;
    background: transparent;
    color: var(--clr-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: border-color 0.16s, color 0.16s, background 0.16s;
    white-space: nowrap;
}

.inv-clear-btn:hover {
    border-color: #e11d48;
    color: #e11d48;
    background: #fff1f2;
}

/* ── Results Section ─────────────────────────────────────────────────────── */
.inv-results {
    margin-top: 24px;
    border-top: 1.5px solid var(--clr-border-soft);
    padding-top: 20px;
    animation: inv-fadeIn 0.28s ease;
}

@keyframes inv-fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Results Grid ────────────────────────────────────────────────────────── */
.inv-results-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 18px;
}

@media (min-width: 700px) {
    .inv-results-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 400px) {
    .inv-results-grid {
        grid-template-columns: 1fr;
    }
}

.inv-result-card {
    background: var(--clr-bg-soft);
    border: 1.5px solid var(--clr-border);
    border-radius: 10px;
    padding: 13px 14px;
    display: flex;
    flex-direction: column;
    gap: 5px;
    transition: border-color 0.16s;
}

.inv-result-card--primary {
    background: var(--clr-accent-light);
    border-color: var(--clr-accent);
    grid-column: span 2;
}

@media (max-width: 400px) {
    .inv-result-card--primary {
        grid-column: span 1;
    }
}

.inv-result-card--inflation {
    border-color: var(--clr-clr-interest, #fbbf24);
    background: #fffbeb;
}

.inv-result-card--tax {
    background: #f0fdf4;
    border-color: var(--clr-green);
}

.inv-result-label {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--clr-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    line-height: 1.3;
}

.inv-result-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--clr-text-primary);
    line-height: 1.2;
    word-break: break-word;
}

.inv-result-card--primary .inv-result-value {
    font-size: 1.5rem;
    color: var(--clr-accent-dark);
}

.inv-result-value--green {
    color: #16a34a;
}

.inv-result-value--accent {
    color: var(--clr-accent-dark);
}

/* ── Breakdown Bar ───────────────────────────────────────────────────────── */
.inv-breakdown {
    margin-bottom: 18px;
}

.inv-breakdown-label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--clr-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 8px;
}

.inv-breakdown-bar {
    display: flex;
    height: 10px;
    border-radius: 999px;
    overflow: hidden;
    background: var(--clr-bg-muted);
    gap: 2px;
}

.inv-bar-principal {
    background: var(--clr-accent);
    border-radius: 999px 0 0 999px;
    transition: width 0.5s cubic-bezier(0.25, 1, 0.5, 1);
    min-width: 4px;
}

.inv-bar-interest {
    background: var(--clr-interest);
    border-radius: 0 999px 999px 0;
    transition: width 0.5s cubic-bezier(0.25, 1, 0.5, 1);
    min-width: 4px;
}

.inv-breakdown-legend {
    display: flex;
    gap: 18px;
    margin-top: 8px;
    flex-wrap: wrap;
}

.inv-legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--clr-text-secondary);
}

.inv-legend-item::before {
    content: '';
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 3px;
    flex-shrink: 0;
}

.inv-legend-principal::before { background: var(--clr-accent); }
.inv-legend-interest::before  { background: var(--clr-interest); }

/* ── Year-by-Year Schedule ───────────────────────────────────────────────── */
.inv-schedule-wrap {
    border: 1.5px solid var(--clr-border);
    border-radius: 10px;
    overflow: hidden;
}

.inv-schedule-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 11px 14px;
    background: var(--clr-bg-soft);
    border-bottom: 1.5px solid var(--clr-border);
    gap: 10px;
}

.inv-schedule-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--clr-text-primary);
    margin: 0;
}

.inv-toggle-table {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--clr-accent-dark);
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 4px 0;
    transition: opacity 0.15s;
    white-space: nowrap;
}

.inv-toggle-table:hover { opacity: 0.75; }

.inv-toggle-chevron {
    transition: transform 0.22s ease;
    flex-shrink: 0;
}

.inv-toggle-table[aria-expanded="true"] .inv-toggle-chevron {
    transform: rotate(180deg);
}

.inv-schedule-body {
    /* controlled by hidden attr */
}

.inv-table-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.inv-schedule-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
}

.inv-schedule-table thead th {
    background: var(--clr-bg-muted);
    color: var(--clr-text-secondary);
    font-weight: 600;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    padding: 8px 14px;
    text-align: right;
    border-bottom: 1.5px solid var(--clr-border);
    white-space: nowrap;
}

.inv-schedule-table thead th:first-child {
    text-align: left;
}

.inv-schedule-table tbody tr {
    border-bottom: 1px solid var(--clr-border-soft);
    transition: background 0.12s;
}

.inv-schedule-table tbody tr:last-child {
    border-bottom: none;
}

.inv-schedule-table tbody tr:hover {
    background: var(--clr-bg-soft);
}

.inv-schedule-table tbody tr:nth-child(even) {
    background: #fafcff;
}

.inv-schedule-table tbody tr:nth-child(even):hover {
    background: var(--clr-bg-soft);
}

.inv-schedule-table td {
    padding: 7px 14px;
    color: var(--clr-text-primary);
    text-align: right;
    white-space: nowrap;
}

.inv-schedule-table td:first-child {
    text-align: left;
    font-weight: 600;
    color: var(--clr-text-secondary);
}

.inv-schedule-table td.inv-td-interest {
    color: #b45309;
}

.inv-schedule-table td.inv-td-balance {
    font-weight: 700;
    color: var(--clr-accent-dark);
}

/* ── Responsive Adjustments ──────────────────────────────────────────────── */
@media (max-width: 480px) {
    .inv-mode-tabs {
        width: 100%;
    }

    .inv-tab {
        flex: 1;
        text-align: center;
        padding: 7px 12px;
    }

    .inv-btn-row {
        flex-direction: column;
    }

    .inv-submit-btn,
    .inv-clear-btn {
        width: 100%;
        justify-content: center;
    }

    .inv-result-card--primary {
        grid-column: span 2;
    }

    .inv-result-card--primary .inv-result-value {
        font-size: 1.25rem;
    }

    .inv-breakdown-legend {
        gap: 10px;
    }
}