:root {
    --bg: #f8f9fc;
    --surface: #ffffff;
    --surface2: #f1f3f9;
    --surface3: #e8ebf3;
    --border: rgba(0, 0, 0, 0.05);
    --border2: rgba(0, 0, 0, 0.08);
    --text: #1a1a24;
    --muted: #555568;
    --dim: #8888a0;
    --accent: #6552e6;
    --accent2: #5ee8b0;
    --warn: #f0a05e;
    --danger: #f05e72;
    --gold: #f0d05e;
    --mono: 'DM Mono', monospace;
    --sans: 'Sora', sans-serif;
    --transition: 0.2s ease-in-out;
}

body.dark-theme {
    --bg: #0f0f12;
    --surface: #16161a;
    --surface2: #1e1e24;
    --surface3: #26262e;
    --border: rgba(255, 255, 255, 0.07);
    --border2: rgba(255, 255, 255, 0.12);
    --text: #f0f0f4;
    --muted: #8888a0;
    --dim: #555568;
    --accent: #7c6df0;
    --accent2: #5ee8b0;
    --warn: #f0a05e;
    --danger: #f05e72;
    --gold: #f0d05e;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    font-size: 14px;
    line-height: 1.6;
    min-height: 100vh;
    transition: background var(--transition), color var(--transition);
}

.app {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

.header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.header h1 {
    font-size: 2rem;
    font-weight: 600;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header p {
    color: var(--muted);
    font-size: 0.875rem;
    margin-top: 0.4rem;
}

/* ── Floating actions ── */
.floating-actions {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    gap: 0;
    background: transparent;
    padding: 0;
    border-radius: 99px;
    box-shadow: none;
    border: none;
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.floating-actions:hover {
    bottom: 2.25rem;
}

.float-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 99px;
    border: none;
    font-family: var(--sans);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    transition: all 0.2s;
    white-space: nowrap;
}

.float-btn.share {
    background: var(--accent);
    color: white;
}

.float-btn:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.float-btn:active {
    transform: translateY(0);
}

@media (max-width: 680px) {
    .floating-actions {
        bottom: 1.5rem;
        right: 1.5rem;
        left: auto;
        transform: none;
        width: auto;
    }
}



.grid2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.grid3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 680px) {

    .grid2,
    .grid3 {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1.5rem;
    transition: background var(--transition), border-color var(--transition);
}

.card-title {
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.card-title .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    display: inline-block;
}

.field {
    margin-bottom: 1rem;
}

.field label {
    display: block;
    font-size: 0.75rem;
    color: var(--muted);
    margin-bottom: 0.4rem;
    letter-spacing: 0.02em;
}

.field input[type=number],
.field input[type=text],
.field select {
    width: 100%;
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: 8px;
    padding: 0.6rem 0.875rem;
    color: var(--text);
    font-family: var(--mono);
    font-size: 0.875rem;
    outline: none;
    transition: border-color 0.15s;
    -moz-appearance: textfield;
    appearance: textfield;
}

.field input::-webkit-outer-spin-button,
.field input::-webkit-inner-spin-button {
    -webkit-appearance: none;
}

.field input:focus,
.field select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(124, 109, 240, 0.12);
}

.field select {
    cursor: pointer;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='7'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238888a0' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.875rem center;
    padding-right: 2rem;
}

/* Tenure years hint — lives inside the label on the same line */
.tenure-hint {
    display: inline-block;
    font-family: var(--mono);
    font-size: 0.68rem;
    color: var(--accent2);
    margin-left: 6px;
    letter-spacing: 0.02em;
    transition: opacity 0.2s;
    font-weight: 400;
}

.range-wrap {
    position: relative;
}

.field input[type=range] {
    width: 100%;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    height: 4px;
    background: var(--surface3);
    border-radius: 2px;
    border: none;
    outline: none;
    cursor: pointer;
}

.field input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 0 0 3px rgba(124, 109, 240, 0.2);
}

.field input[type=range]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    cursor: pointer;
}

.range-label {
    display: flex;
    justify-content: space-between;
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--dim);
    margin-top: 0.3rem;
}

.range-val {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--accent);
    text-align: right;
    margin-bottom: 0.3rem;
}

.stat {
    text-align: center;
    padding: 1.25rem 1rem;
    background: var(--surface2);
    border-radius: 10px;
    border: 1px solid var(--border);
}

.stat-label {
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 0.5rem;
}

.stat-value {
    font-family: var(--mono);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text);
}

.stat-sub {
    font-size: 0.7rem;
    color: var(--dim);
    margin-top: 0.25rem;
}

.stat-value.accent {
    color: var(--accent);
}

.stat-value.green {
    color: var(--accent2);
}

.stat-value.warn {
    color: var(--warn);
}

.stat-value.gold {
    color: var(--gold);
}

/* ── Prepayment tab bar ─────────────────────────── */
.tab-bar {
    display: flex;
    gap: 4px;
    background: var(--surface2);
    border-radius: 10px;
    padding: 4px;
    margin-bottom: 1.25rem;
}

.tab {
    flex: 1;
    padding: 0.5rem;
    border-radius: 7px;
    border: none;
    background: transparent;
    color: var(--muted);
    font-family: var(--sans);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.15s;
    text-align: center;
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.tab.active {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border2);
}

/* Active indicator dot on a prepayment tab */
.tab-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent2);
    flex-shrink: 0;
    box-shadow: 0 0 5px var(--accent2);
    animation: dotPulse 2s ease-in-out infinite;
}

@keyframes dotPulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.6;
        transform: scale(0.75);
    }
}

.prepay-section {
    display: none;
}

.prepay-section.active {
    display: block;
}

#theme-toggle {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--border2);
    background: var(--surface2);
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition);
    z-index: 100;
}

#theme-toggle:hover {
    background: var(--surface3);
    transform: scale(1.05);
}

@media (max-width: 680px) {
    #theme-toggle {
        top: 1rem;
        right: 1rem;
    }
}

/* ── Buttons ─────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0.6rem 1.25rem;
    border-radius: 8px;
    border: 1px solid var(--border2);
    background: transparent;
    color: var(--text);
    font-family: var(--sans);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.15s;
}

.btn:hover {
    background: var(--surface2);
}

.btn.primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.btn.primary:hover {
    opacity: 0.9;
}

/* ── Section divider ─────────────────────────────── */
.section-divider {
    margin: 2rem 0 1.25rem;
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--dim);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.section-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

/* ── Insight boxes ───────────────────────────────── */
.insight-box {
    border-radius: 10px;
    padding: 1rem 1.25rem;
    display: flex;
    gap: 0.875rem;
    align-items: flex-start;
    margin-bottom: 0.75rem;
    border: 1px solid;
}

.insight-box.gold {
    background: rgba(240, 208, 94, 0.06);
    border-color: rgba(240, 208, 94, 0.2);
}

.insight-box.green {
    background: rgba(94, 232, 176, 0.06);
    border-color: rgba(94, 232, 176, 0.2);
}

.insight-box.warn {
    background: rgba(240, 160, 94, 0.06);
    border-color: rgba(240, 160, 94, 0.2);
}

.insight-box.danger {
    background: rgba(240, 94, 114, 0.06);
    border-color: rgba(240, 94, 114, 0.2);
}

.insight-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.insight-content p {
    font-size: 0.8rem;
    color: var(--muted);
    margin-top: 0.2rem;
}

.insight-title {
    font-size: 0.875rem;
    font-weight: 500;
}

.insight-title.gold {
    color: var(--gold);
}

.insight-title.green {
    color: var(--accent2);
}

.insight-title.warn {
    color: var(--warn);
}

.insight-title.danger {
    color: var(--danger);
}

/* ── Chart ───────────────────────────────────────── */
.chart-wrap {
    position: relative;
    width: 100%;
}

/* ── Amortization table ──────────────────────────── */
.schedule-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.78rem;
    font-family: var(--mono);
}

.schedule-table th {
    text-align: left;
    padding: 0.5rem 0.75rem;
    color: var(--muted);
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border-bottom: 1px solid var(--border);
    font-weight: 400;
}

.schedule-table td {
    padding: 0.45rem 0.75rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    color: var(--text);
}

.schedule-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

.schedule-table td.green {
    color: var(--accent2);
}

.schedule-table td.warn {
    color: var(--warn);
}

.schedule-table td.gold {
    color: var(--gold);
}

.schedule-table td.accent {
    color: var(--accent);
}

.schedule-wrap {
    max-height: 320px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--surface3) transparent;
}

/* ── Badges ──────────────────────────────────────── */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    font-weight: 500;
    text-transform: uppercase;
    font-family: var(--mono);
}

.badge.gold {
    background: rgba(240, 208, 94, 0.15);
    color: var(--gold);
    border: 1px solid rgba(240, 208, 94, 0.3);
}

.badge.green {
    background: rgba(94, 232, 176, 0.15);
    color: var(--accent2);
    border: 1px solid rgba(94, 232, 176, 0.3);
}

.badge.warn {
    background: rgba(240, 160, 94, 0.15);
    color: var(--warn);
    border: 1px solid rgba(240, 160, 94, 0.3);
}

.badge.dim {
    background: rgba(255, 255, 255, 0.06);
    color: var(--dim);
    border: 1px solid var(--border);
}

/* ── Prepay UI ───────────────────────────────────── */
.add-prepay-btn {
    width: 100%;
    padding: 0.6rem;
    border-radius: 8px;
    border: 1px dashed var(--border2);
    background: transparent;
    color: var(--muted);
    font-family: var(--sans);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.15s;
    margin-top: 0.75rem;
}

.add-prepay-btn:hover {
    background: var(--surface2);
    color: var(--text);
}

.prepay-item {
    display: grid;
    grid-template-columns: 80px 1fr 100px 36px;
    gap: 8px;
    align-items: end;
    margin-bottom: 0.75rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.remove-btn {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: 1px solid var(--border2);
    background: transparent;
    color: var(--muted);
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
    margin-bottom: 2px;
}

.remove-btn:hover {
    background: rgba(240, 94, 114, 0.1);
    color: var(--danger);
    border-color: rgba(240, 94, 114, 0.3);
}

/* ── Misc utilities ──────────────────────────────── */
.mono {
    font-family: var(--mono);
}

.progress-bar {
    height: 6px;
    background: var(--surface3);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 0.5rem;
}

.progress-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.5s ease;
}

/* ── Golden zone ─────────────────────────────────── */
.golden-zone {
    background: linear-gradient(90deg, var(--accent) 0%, var(--accent2) 100%);
    padding: 1.25rem;
    border-radius: 12px;
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1rem;
}

.golden-number {
    font-family: var(--mono);
    font-size: 2.5rem;
    font-weight: 500;
    color: #fff;
    line-height: 1;
}

.golden-label {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 4px;
}

.golden-desc {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.85);
    flex: 1;
}

.golden-tag {
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.68rem;
    color: #fff;
    display: inline-block;
    margin-top: 4px;
}

/* ── Diminishing returns ─────────────────────────── */
.diminish-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.diminish-label {
    font-size: 0.75rem;
    color: var(--muted);
    width: 80px;
    flex-shrink: 0;
}

.diminish-track {
    flex: 1;
    height: 8px;
    background: var(--surface3);
    border-radius: 4px;
    overflow: hidden;
}

.diminish-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.4s ease;
}

.diminish-val {
    font-family: var(--mono);
    font-size: 0.73rem;
    width: 60px;
    text-align: right;
}

.row {
    display: flex;
    gap: 1rem;
}

.col {
    flex: 1;
}

.spacer {
    height: 1rem;
}

/* ── Chart toggle ────────────────────────────────── */
.toggle-group {
    display: flex;
    gap: 4px;
    background: var(--surface2);
    border-radius: 8px;
    padding: 3px;
    margin-bottom: 1rem;
}

.toggle-btn {
    flex: 1;
    padding: 0.4rem 0.5rem;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: var(--muted);
    font-family: var(--sans);
    font-size: 0.72rem;
    cursor: pointer;
    transition: all 0.15s;
    text-align: center;
}

.toggle-btn.active {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border2);
}

.note {
    font-size: 0.73rem;
    color: var(--dim);
    margin-top: 0.5rem;
}

.highlight-row td {
    background: rgba(240, 208, 94, 0.12) !important;
    border-bottom: 2px solid var(--gold) !important;
}

.highlight-row td:first-child {
    border-left: 4px solid var(--gold);
}

.info-pill {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: rgba(124, 109, 240, 0.1);
    border: 1px solid rgba(124, 109, 240, 0.2);
    color: var(--accent);
    font-size: 0.72rem;
    padding: 3px 10px;
    border-radius: 20px;
}