/* ================================================================
   Percentage Calculator — percentage-calculator.css
   Prefix: pc-
   ================================================================ */

/* ── Tool Root ── */
.pc-tool {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

/* ================================================================
   MODE CARDS — All 6 visible simultaneously, sentence-style
   ================================================================ */
.pc-modes-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.pc-mode-card {
    background: var(--color-surface);
    border: 1.5px solid var(--color-border, #E2E8F0);
    border-radius: var(--radius-lg);
    padding: var(--space-4) var(--space-5);
    transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

[data-theme="dark"] .pc-mode-card {
    border-color: rgba(255, 255, 255, 0.08);
}

.pc-mode-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.08);
}

.pc-mode-card.active {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12);
    background: rgba(59, 130, 246, 0.03);
}

[data-theme="dark"] .pc-mode-card.active {
    background: rgba(59, 130, 246, 0.07);
}

/* Mode header */
.pc-mode-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

.pc-mode-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--color-bg-secondary);
    color: var(--color-text-muted);
    font-size: var(--text-xs);
    font-weight: 700;
    font-family: var(--font-heading);
    flex-shrink: 0;
    transition: background var(--transition-base), color var(--transition-base);
}

.pc-mode-card.active .pc-mode-number {
    background: var(--color-accent);
    color: #fff;
}

.pc-mode-label {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-muted);
}

/* ── Sentence Row ── */
.pc-sentence-row {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.pc-sentence {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-1);
    font-size: var(--text-lg);
    font-family: var(--font-body);
    color: var(--color-text);
    font-weight: 400;
    line-height: 2;
    flex: 1;
    min-width: 0;
}

/* ── Inline Inputs — fill-in-the-blank style ── */
.pc-inline-input {
    -webkit-appearance: none;
    -moz-appearance: textfield;
    appearance: none;
    border: none;
    border-bottom: 2px solid var(--color-accent);
    border-radius: 0;
    background: transparent;
    font-size: var(--text-lg);
    font-family: var(--font-body);
    font-weight: 700;
    color: var(--color-accent);
    text-align: center;
    width: 70px;
    min-width: 50px;
    max-width: 140px;
    padding: 0 4px 2px;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    line-height: 1.4;
}

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

.pc-inline-input:focus {
    border-bottom-color: var(--color-accent-dark, #2563EB);
    box-shadow: 0 2px 0 0 rgba(59, 130, 246, 0.2);
}

.pc-inline-input::placeholder {
    color: var(--color-text-muted);
    font-weight: 400;
    font-style: italic;
}

/* ── Result Badge ── */
.pc-result-badge {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    background: var(--color-bg-secondary);
    border: 1.5px solid transparent;
    min-width: 100px;
    transition: all var(--transition-base);
}

.pc-result-badge.has-value {
    background: rgba(59, 130, 246, 0.08);
    border-color: rgba(59, 130, 246, 0.2);
}

.pc-result-value {
    font-size: var(--text-xl);
    font-weight: 800;
    font-family: var(--font-heading);
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.pc-result-badge.has-value .pc-result-value {
    color: var(--color-accent);
    animation: pc-pop-in 0.22s ease forwards;
}

.pc-val-up  { color: var(--color-success) !important; }
.pc-val-down { color: var(--color-error)   !important; }

@keyframes pc-pop-in {
    0%   { transform: scale(0.82); opacity: 0.5; }
    60%  { transform: scale(1.07); }
    100% { transform: scale(1);    opacity: 1; }
}

/* ================================================================
   EXPANDED RESULT PANEL
   ================================================================ */
.pc-expanded-panel {
    display: none;
    background: var(--color-surface);
    border: 1.5px solid var(--color-accent);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.pc-expanded-panel.visible {
    display: block;
    animation: pc-slide-down 0.25s ease forwards;
}

@keyframes pc-slide-down {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.pc-expanded-inner {
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.pc-expanded-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-bottom: 1px solid var(--color-bg-secondary);
    padding-bottom: var(--space-3);
}

.pc-section-label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

.pc-section-label i { color: var(--color-accent); }

/* Formula */
.pc-formula-box {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-text);
    line-height: 1.7;
    word-break: break-all;
}

/* Steps */
.pc-steps-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.pc-step {
    display: flex;
    gap: var(--space-3);
    align-items: flex-start;
}

.pc-step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    min-width: 22px;
    border-radius: 50%;
    background: var(--color-accent);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    font-family: var(--font-heading);
    margin-top: 1px;
}

.pc-step-text {
    font-size: var(--text-sm);
    color: var(--color-text);
    line-height: 1.6;
    font-family: var(--font-mono);
}

/* ── Charts ── */
.pc-chart-area { display: flex; flex-direction: column; gap: var(--space-2); }

/* Bar chart */
.pc-chart-bar-wrap { display: flex; flex-direction: column; gap: var(--space-2); }

.pc-chart-bar-track {
    height: 22px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.pc-chart-bar-fill {
    height: 100%;
    background: var(--color-accent);
    border-radius: var(--radius-full);
    transition: width 0.45s ease;
    min-width: 2px;
}

.pc-chart-bar-labels {
    display: flex;
    justify-content: space-between;
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.pc-chart-label-part { color: var(--color-accent); font-weight: 600; }

/* Pie chart */
.pc-chart-pie-wrap {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    flex-wrap: wrap;
}

.pc-chart-pie {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    position: relative;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.pc-chart-pie-center {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-sm);
    font-weight: 800;
    font-family: var(--font-heading);
    color: var(--color-text);
    background: radial-gradient(circle, var(--color-surface) 54%, transparent 55%);
    border-radius: 50%;
}

.pc-chart-pie-legend { display: flex; flex-direction: column; gap: var(--space-2); }

.pc-legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.pc-legend-dot {
    width: 12px; height: 12px;
    border-radius: 50%;
    background: var(--color-accent);
    flex-shrink: 0;
}

.pc-legend-dot-empty {
    background: var(--color-bg-secondary);
    border: 1.5px solid var(--color-border, #E2E8F0);
}

/* Compare bars */
.pc-chart-compare { display: flex; flex-direction: column; gap: var(--space-3); }

.pc-compare-row { display: flex; align-items: center; gap: var(--space-3); }

.pc-compare-label {
    font-size: var(--text-xs); font-weight: 600;
    color: var(--color-text-muted);
    width: 44px; flex-shrink: 0; text-align: right;
}

.pc-compare-track {
    flex: 1; height: 16px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-full); overflow: hidden;
}

.pc-compare-bar {
    height: 100%; border-radius: var(--radius-full);
    transition: width 0.45s ease; min-width: 2px;
}

.pc-compare-old      { background: var(--color-text-muted); }
.pc-compare-new-up   { background: var(--color-success); }
.pc-compare-new-down { background: var(--color-error); }

.pc-compare-val {
    font-size: var(--text-sm); font-weight: 700;
    font-family: var(--font-heading); color: var(--color-text);
    width: 64px; flex-shrink: 0;
}

/* Stack bar */
.pc-chart-stackbar { display: flex; flex-direction: column; gap: var(--space-2); }

.pc-stack-track {
    height: 22px; display: flex;
    border-radius: var(--radius-full); overflow: hidden;
    background: var(--color-bg-secondary);
}

.pc-stack-orig    { background: var(--color-accent); height: 100%; transition: width 0.45s ease; }
.pc-stack-added   { background: var(--color-success); height: 100%; transition: width 0.45s ease; }
.pc-stack-removed { background: rgba(239,68,68,0.5);  height: 100%; transition: width 0.45s ease; }

.pc-stack-labels {
    display: flex; gap: var(--space-3);
    font-size: var(--text-xs); color: var(--color-text-muted);
}

.pc-stack-label-add { color: var(--color-success); font-weight: 600; }
.pc-stack-label-rem { color: var(--color-error);   font-weight: 600; }

/* Reverse link */
.pc-reverse-row {
    display: flex; align-items: center; gap: var(--space-2);
    font-size: var(--text-sm); color: var(--color-text-muted); flex-wrap: wrap;
}

.pc-reverse-link {
    color: var(--color-accent); text-decoration: none; font-weight: 600;
    border-bottom: 1px dashed var(--color-accent);
    transition: color var(--transition-fast);
}

.pc-reverse-link:hover {
    color: var(--color-accent-dark, #2563EB);
    border-bottom-style: solid;
}

/* Copy buttons */
.pc-copy-row { display: flex; gap: var(--space-2); flex-wrap: wrap; }

.pc-copy-btn {
    display: inline-flex; align-items: center; gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border: 1.5px solid var(--color-border, #E2E8F0);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text-secondary);
    font-size: var(--text-sm); font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.pc-copy-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: rgba(59, 130, 246, 0.06);
}

/* ================================================================
   SECTION CARDS — Tip & Discount
   ================================================================ */
.pc-section-card {
    background: var(--color-surface);
    border: 1.5px solid var(--color-border, #E2E8F0);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

[data-theme="dark"] .pc-section-card {
    border-color: rgba(255, 255, 255, 0.08);
}

.pc-section-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    background: linear-gradient(135deg, rgba(59,130,246,0.05), rgba(139,92,246,0.05));
    border-bottom: 1px solid var(--color-bg-secondary);
}

.pc-section-icon { font-size: var(--text-xl); }

.pc-section-title {
    font-size: var(--text-lg); font-weight: 700;
    font-family: var(--font-heading); color: var(--color-text);
}

.pc-section-body {
    padding: var(--space-5);
    display: flex; flex-direction: column; gap: var(--space-5);
}

/* Inputs row */
.pc-inputs-row {
    display: flex; gap: var(--space-4);
    flex-wrap: wrap; align-items: flex-end;
}

.pc-input-group {
    display: flex; flex-direction: column; gap: var(--space-1);
    flex: 1; min-width: 120px;
}

.pc-input-group label {
    font-size: var(--text-sm); font-weight: 600; color: var(--color-text-secondary);
}

.pc-input-group input[type="number"] {
    -webkit-appearance: none; -moz-appearance: textfield; appearance: none;
    width: 100%;
    padding: var(--space-2) var(--space-3);
    border: 1.5px solid var(--color-border, #E2E8F0);
    border-radius: var(--radius-md);
    background: var(--color-bg-secondary);
    color: var(--color-text);
    font-size: var(--text-base); font-family: var(--font-body); font-weight: 600;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.pc-input-group input[type="number"]::-webkit-outer-spin-button,
.pc-input-group input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; }

.pc-input-group input[type="number"]:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12);
    background: var(--color-surface);
}

.pc-input-hint { font-size: var(--text-xs); color: var(--color-text-muted); }

/* Preset pills */
.pc-presets { display: flex; gap: var(--space-2); flex-wrap: wrap; }

.pc-tip-preset, .pc-disc-preset {
    padding: var(--space-1) var(--space-3);
    border: 1.5px solid var(--color-border, #E2E8F0);
    border-radius: var(--radius-full);
    background: var(--color-surface);
    color: var(--color-text-secondary);
    font-size: var(--text-sm); font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.pc-tip-preset:hover, .pc-disc-preset:hover {
    border-color: var(--color-accent); color: var(--color-accent);
    background: rgba(59, 130, 246, 0.08);
}

.pc-tip-preset.active, .pc-disc-preset.active {
    background: var(--color-accent); color: #fff;
    border-color: var(--color-accent);
}

/* ================================================================
   TIP CALCULATOR
   ================================================================ */
.pc-tip-results {
    display: none; flex-direction: column; gap: var(--space-4);
}

.pc-tip-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
}

.pc-tip-stat {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    text-align: center;
}

.pc-tip-stat-label {
    font-size: var(--text-xs); font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.05em;
    color: var(--color-text-muted); margin-bottom: var(--space-1);
}

.pc-tip-stat-value {
    font-size: var(--text-2xl); font-weight: 800;
    font-family: var(--font-heading); color: var(--color-accent);
}

.pc-tip-stat-sub { font-size: var(--text-xs); color: var(--color-text-muted); margin-top: 2px; }

/* Round-up */
.pc-roundup-row {
    display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap;
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-secondary); border-radius: var(--radius-md);
    font-size: var(--text-sm); color: var(--color-text-secondary);
}

.pc-roundup-btn {
    padding: var(--space-1) var(--space-3);
    border: 1.5px solid var(--color-border, #E2E8F0);
    border-radius: var(--radius-full);
    background: var(--color-surface);
    font-size: var(--text-sm); font-weight: 600; color: var(--color-text-secondary);
    cursor: pointer; transition: all var(--transition-fast);
}

.pc-roundup-btn:hover, .pc-roundup-btn.active {
    border-color: var(--color-accent-purple, #8B5CF6);
    color: var(--color-accent-purple, #8B5CF6);
    background: rgba(139, 92, 246, 0.08);
}

.pc-roundup-result { font-weight: 600; color: var(--color-text); }

/* Comparison table */
.pc-table-wrap {
    overflow-x: auto; -webkit-overflow-scrolling: touch;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border, #E2E8F0);
}

.pc-comparison-table {
    width: 100%; border-collapse: collapse; font-size: var(--text-sm);
}

.pc-comparison-table thead { background: var(--color-bg-secondary); }

.pc-comparison-table th {
    padding: var(--space-2) var(--space-3);
    text-align: left; font-size: var(--text-xs); font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.05em;
    color: var(--color-text-muted); white-space: nowrap;
}

.pc-comparison-table td {
    padding: var(--space-2) var(--space-3);
    color: var(--color-text);
    border-top: 1px solid var(--color-bg-secondary);
    white-space: nowrap; font-weight: 500;
}

.pc-comparison-table td:first-child { font-weight: 700; color: var(--color-text-secondary); }

.pc-comparison-table tr.pc-tbl-selected { background: rgba(59, 130, 246, 0.08); }
.pc-comparison-table tr.pc-tbl-selected td { color: var(--color-accent); }
.pc-comparison-table tr.pc-tbl-selected td:first-child { color: var(--color-accent); font-weight: 800; }

/* ================================================================
   DISCOUNT CALCULATOR
   ================================================================ */
.pc-price-tag-wrap {
    display: flex; align-items: center; justify-content: center; padding: var(--space-2);
}

.pc-price-tag {
    position: relative;
    display: inline-flex; flex-direction: column; align-items: center;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-purple, #8B5CF6));
    color: #fff;
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 160px; text-align: center;
}

.pc-price-tag::before {
    content: '';
    position: absolute; left: -10px; top: 50%; transform: translateY(-50%);
    width: 20px; height: 20px;
    background: var(--color-bg);
    border-radius: 50%;
}

.pc-price-tag-badge {
    font-size: var(--text-xs); font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.08em;
    background: rgba(255,255,255,0.22);
    border-radius: var(--radius-full); padding: 2px 10px; margin-bottom: var(--space-2);
}

.pc-price-tag-orig {
    font-size: var(--text-base);
    text-decoration: line-through; opacity: 0.7;
    font-family: var(--font-heading);
}

.pc-price-tag-new {
    font-size: var(--text-4xl); font-weight: 900;
    font-family: var(--font-heading); line-height: 1.1;
}

.pc-disc-results {
    display: none; flex-direction: column; gap: var(--space-4);
}

.pc-disc-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--space-3);
}

.pc-disc-stat {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
}

.pc-disc-stat-label {
    font-size: var(--text-xs); font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.05em;
    color: var(--color-text-muted); margin-bottom: var(--space-1);
}

.pc-disc-stat-value {
    font-size: var(--text-2xl); font-weight: 800;
    font-family: var(--font-heading); color: var(--color-accent);
}

.pc-disc-stat-sub { font-size: var(--text-xs); color: var(--color-text-muted); margin-top: 2px; }
.pc-disc-stat.pc-stat-savings .pc-disc-stat-value { color: var(--color-success); }

/* Cascade */
.pc-disc-cascade {
    display: none;
    background: var(--color-bg-secondary); border-radius: var(--radius-md); padding: var(--space-4);
}

.pc-cascade-title {
    font-size: var(--text-sm); font-weight: 700; color: var(--color-text-secondary); margin-bottom: var(--space-3);
}

.pc-cascade-steps { display: flex; flex-direction: column; align-items: flex-start; }

.pc-cascade-step { display: flex; flex-direction: column; align-items: flex-start; width: 100%; }

.pc-cascade-item {
    display: flex; align-items: center; gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    background: var(--color-surface); border-radius: var(--radius-md);
    width: 100%; box-sizing: border-box;
}

.pc-cascade-label { flex: 1; font-size: var(--text-sm); color: var(--color-text-secondary); }

.pc-cascade-price {
    font-size: var(--text-base); font-weight: 800;
    font-family: var(--font-heading); color: var(--color-text);
}

.pc-cascade-saved {
    font-size: var(--text-xs); color: var(--color-success); font-weight: 600;
    background: rgba(16,185,129,0.1); padding: 2px 8px; border-radius: var(--radius-full);
}

.pc-cascade-arrow {
    padding: var(--space-1) var(--space-3); color: var(--color-text-muted); font-size: var(--text-xs);
}

.pc-cascade-note {
    margin-top: var(--space-3); padding: var(--space-3);
    background: rgba(245,158,11,0.1);
    border: 1px solid rgba(245,158,11,0.25);
    border-radius: var(--radius-md);
    font-size: var(--text-sm); color: var(--color-text-secondary); line-height: 1.5;
}

.pc-cascade-note i { color: var(--color-warning); margin-right: var(--space-1); }

/* Extra discount rows */
.pc-extra-discounts { display: flex; flex-direction: column; gap: var(--space-2); }

.pc-extra-disc-row {
    display: flex; align-items: center; gap: var(--space-2);
    font-size: var(--text-sm); color: var(--color-text-secondary);
}

.pc-extra-disc-label { font-weight: 500; white-space: nowrap; }

.pc-extra-disc-input {
    -webkit-appearance: none; -moz-appearance: textfield;
    width: 80px; padding: var(--space-1) var(--space-2);
    border: 1.5px solid var(--color-border, #E2E8F0); border-radius: var(--radius-md);
    background: var(--color-bg-secondary); color: var(--color-text);
    font-size: var(--text-sm); font-weight: 600; text-align: center;
    outline: none; transition: border-color var(--transition-fast);
}

.pc-extra-disc-input::-webkit-outer-spin-button,
.pc-extra-disc-input::-webkit-inner-spin-button { -webkit-appearance: none; }

.pc-extra-disc-input:focus { border-color: var(--color-accent); }
.pc-extra-disc-unit { font-weight: 600; color: var(--color-text-muted); }

.pc-extra-disc-remove {
    display: inline-flex; align-items: center; justify-content: center;
    width: 28px; height: 28px; border: none;
    background: rgba(239,68,68,0.1); color: var(--color-error);
    border-radius: var(--radius-md); cursor: pointer; transition: background var(--transition-fast);
}

.pc-extra-disc-remove:hover { background: rgba(239,68,68,0.2); }

.pc-add-disc-btn {
    display: inline-flex; align-items: center; gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border: 1.5px dashed var(--color-border, #E2E8F0); border-radius: var(--radius-md);
    background: transparent; color: var(--color-text-secondary);
    font-size: var(--text-sm); font-weight: 600;
    cursor: pointer; transition: all var(--transition-fast); align-self: flex-start;
}

.pc-add-disc-btn:hover {
    border-color: var(--color-accent); color: var(--color-accent);
    background: rgba(59, 130, 246, 0.06);
}

/* ================================================================
   CALCULATION HISTORY
   ================================================================ */
.pc-history-panel {
    background: var(--color-surface);
    border: 1.5px solid var(--color-border, #E2E8F0);
    border-radius: var(--radius-lg); overflow: hidden;
}

[data-theme="dark"] .pc-history-panel {
    border-color: rgba(255, 255, 255, 0.08);
}

.pc-history-toggle {
    display: flex; align-items: center; gap: var(--space-2);
    width: 100%; padding: var(--space-4) var(--space-5);
    background: none; border: none; cursor: pointer;
    font-size: var(--text-base); font-weight: 700; font-family: var(--font-heading);
    color: var(--color-text); text-align: left; transition: background var(--transition-fast);
}

.pc-history-toggle:hover { background: var(--color-bg-secondary); }
.pc-history-toggle i:first-child { color: var(--color-accent-purple, #8B5CF6); }

.pc-history-count {
    font-size: var(--text-sm); font-weight: 500;
    color: var(--color-text-muted); margin-left: auto; margin-right: var(--space-2);
}

.pc-chevron { transition: transform var(--transition-base); color: var(--color-text-muted); font-size: var(--text-sm); }

.pc-history-body { display: none; border-top: 1px solid var(--color-bg-secondary); }
.pc-history-body.open { display: block; }

.pc-history-list { display: flex; flex-direction: column; }

.pc-history-item {
    display: flex; flex-direction: column; gap: var(--space-1);
    padding: var(--space-3) var(--space-5);
    border: none; background: none; text-align: left; cursor: pointer;
    border-top: 1px solid var(--color-bg-secondary); transition: background var(--transition-fast);
}

.pc-history-item:first-child { border-top: none; }
.pc-history-item:hover { background: var(--color-bg-secondary); }

.pc-history-question { font-size: var(--text-sm); color: var(--color-text-secondary); font-weight: 500; }

.pc-history-meta {
    display: flex; align-items: center; justify-content: space-between; gap: var(--space-3);
}

.pc-history-answer { font-size: var(--text-base); font-weight: 800; font-family: var(--font-heading); color: var(--color-accent); }
.pc-history-time { font-size: var(--text-xs); color: var(--color-text-muted); }

.pc-history-footer {
    padding: var(--space-3) var(--space-5);
    border-top: 1px solid var(--color-bg-secondary);
    display: flex; align-items: center; justify-content: flex-end;
}

.pc-history-empty {
    padding: var(--space-5); text-align: center;
    font-size: var(--text-sm); color: var(--color-text-muted);
}

.pc-history-clear-btn {
    display: inline-flex; align-items: center; gap: var(--space-2);
    padding: var(--space-1) var(--space-3);
    border: 1.5px solid rgba(239,68,68,0.3); border-radius: var(--radius-md);
    background: transparent; color: var(--color-error);
    font-size: var(--text-sm); font-weight: 600; cursor: pointer; transition: all var(--transition-fast);
}

.pc-history-clear-btn:hover { background: rgba(239,68,68,0.08); border-color: var(--color-error); }

/* ================================================================
   REFERENCE TABLE
   ================================================================ */
.pc-reference {
    background: var(--color-surface);
    border: 1.5px solid var(--color-border, #E2E8F0);
    border-radius: var(--radius-lg); overflow: hidden;
}

[data-theme="dark"] .pc-reference { border-color: rgba(255, 255, 255, 0.08); }

.pc-reference-summary {
    display: flex; align-items: center; gap: var(--space-2);
    padding: var(--space-4) var(--space-5); cursor: pointer;
    font-size: var(--text-base); font-weight: 700; font-family: var(--font-heading);
    color: var(--color-text); list-style: none; user-select: none;
    transition: background var(--transition-fast);
}

.pc-reference-summary:hover { background: var(--color-bg-secondary); }
.pc-reference-summary::-webkit-details-marker { display: none; }
.pc-reference-summary i:first-child { color: var(--color-accent); }

.pc-reference-table-wrap {
    border-top: 1px solid var(--color-bg-secondary);
    overflow-x: auto; -webkit-overflow-scrolling: touch;
}

.pc-ref-table { width: 100%; border-collapse: collapse; font-size: var(--text-sm); }

.pc-ref-table th {
    padding: var(--space-2) var(--space-4);
    background: var(--color-bg-secondary);
    font-size: var(--text-xs); font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.05em;
    color: var(--color-text-muted); text-align: left; white-space: nowrap;
}

.pc-ref-table td {
    padding: var(--space-2) var(--space-4);
    border-top: 1px solid var(--color-bg-secondary);
    color: var(--color-text); font-weight: 500; white-space: nowrap;
}

.pc-ref-table td:first-child { font-weight: 700; color: var(--color-accent); font-family: var(--font-mono); }

/* ================================================================
   TOAST
   ================================================================ */
.pc-toast {
    position: fixed; bottom: 2rem; left: 50%;
    transform: translateX(-50%) translateY(1rem);
    padding: var(--space-2) var(--space-5);
    background: var(--color-text); color: var(--color-surface);
    font-size: var(--text-sm); font-weight: 600;
    border-radius: var(--radius-full);
    opacity: 0; pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
    z-index: 9999; white-space: nowrap; box-shadow: var(--shadow-xl);
}

.pc-toast.visible { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 768px) {
    .pc-sentence { font-size: var(--text-base); }
    .pc-inline-input { font-size: var(--text-base); width: 60px; }
    .pc-result-value { font-size: var(--text-lg); }

    .pc-sentence-row { flex-direction: column; align-items: flex-start; }
    .pc-result-badge { align-self: flex-start; min-width: 80px; }

    .pc-tip-summary { grid-template-columns: 1fr 1fr; }
    .pc-tip-stat:last-child { grid-column: 1 / -1; }

    .pc-chart-pie-wrap { flex-direction: column; align-items: flex-start; }
    .pc-inputs-row { flex-direction: column; }
    .pc-input-group { min-width: unset; width: 100%; }
    .pc-price-tag-new { font-size: var(--text-3xl); }
}

@media (max-width: 480px) {
    .pc-mode-card { padding: var(--space-3) var(--space-4); }
    .pc-section-body { padding: var(--space-4); }
    .pc-expanded-inner { padding: var(--space-4); }
    .pc-tip-summary { grid-template-columns: 1fr; }
    .pc-tip-stat:last-child { grid-column: unset; }
    .pc-roundup-row { flex-direction: column; align-items: flex-start; }
}