:root{color-scheme:light dark;--bg:#f3f4f6;--surface:#fff;--surface-muted:#f8fafc;--text:#111827;--muted:#64748b;--border:#dbe2ea;--primary:#1d4ed8;--danger:#b91c1c;--income:#047857;--expense:#b91c1c;--shadow:0 12px 30px rgba(15,23,42,.08);--radius:18px} :root[data-theme="dark"]{--bg:#0f172a;--surface:#172033;--surface-muted:#111827;--text:#f8fafc;--muted:#a8b3c5;--border:#334155;--primary:#60a5fa;--danger:#f87171;--income:#34d399;--expense:#f87171;--shadow:0 12px 30px rgba(0,0,0,.3)}
*{box-sizing:border-box}html{overflow-x:hidden}body{margin:0;min-height:100vh;padding:env(safe-area-inset-top) env(safe-area-inset-right) calc(78px + env(safe-area-inset-bottom)) env(safe-area-inset-left);background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.5}button,input,select{font:inherit}button{touch-action:manipulation}.app-header{max-width:1100px;margin:auto;padding:24px 18px 12px;display:flex;align-items:center;justify-content:space-between;gap:16px}h1,h2,h3,p{margin-top:0}h1{margin-bottom:0;font-size:clamp(1.55rem,6vw,2.2rem)}h2{margin-bottom:0;font-size:1.25rem}h3{margin:22px 0 12px}.eyebrow{margin-bottom:4px;color:var(--muted);font-size:.72rem;font-weight:800;letter-spacing:.14em}.app-main{width:min(100%,1100px);margin:auto;padding:12px 18px 35px}.app-panel{display:none}.app-panel.active{display:block}.card{min-width:0;padding:20px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}.subheading{margin-top:24px;margin-bottom:12px}.subheading h3{margin:0}.form-grid,.selector-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.selector-row{max-width:600px}.field{display:grid;gap:7px;min-width:0;font-weight:700}.field-full{grid-column:1/-1}fieldset.field{margin:0;padding:0;border:0}.type-selector{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px}.type-selector legend{width:100%}.type-selector label{display:inline-flex;align-items:center;gap:8px;min-height:44px}.type-selector input{width:20px;height:20px}input,select{width:100%;min-height:48px;padding:10px 12px;border:1px solid var(--border);border-radius:12px;background:var(--surface-muted);color:var(--text)}input:focus,select:focus{outline:3px solid color-mix(in srgb,var(--primary) 25%,transparent);border-color:var(--primary)}.button,.icon-button{min-height:44px;border:0;border-radius:12px;cursor:pointer;font-weight:800}.button{padding:10px 16px}.button-wide{width:100%;margin-top:4px}.button-primary{background:var(--primary);color:#fff}.button-secondary{border:1px solid var(--border);background:var(--surface-muted);color:var(--text)}.button-danger{background:var(--danger);color:#fff}.icon-button{width:46px;background:var(--surface);color:var(--text);border:1px solid var(--border)}.message{min-height:24px;margin:12px 0 2px}.error-message{color:var(--danger);font-weight:700}.record-count{margin:0;color:var(--muted);font-weight:800}.empty-state{padding:26px 12px;text-align:center;color:var(--muted)}.hidden{display:none!important}.transaction-list{display:grid;gap:12px}.transaction-item{padding:14px;border:1px solid var(--border);border-radius:14px;background:var(--surface-muted)}.transaction-top{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.transaction-date{margin-bottom:3px;color:var(--muted);font-size:.9rem}.transaction-category{margin-bottom:0;font-weight:800}.transaction-amount{margin:0;flex-shrink:0;font-size:1.12rem;font-weight:900}.income{color:var(--income)}.expense{color:var(--expense)}.transaction-memo{margin:10px 0 0;color:var(--muted);overflow-wrap:anywhere}.transaction-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:12px}.summary-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.summary-card{padding:15px;border:1px solid var(--border);border-radius:14px;background:var(--surface-muted)}.summary-label{margin-bottom:6px;color:var(--muted);font-size:.85rem;font-weight:700}.summary-value{margin:0;font-size:1.25rem;font-weight:900;overflow-wrap:anywhere}.two-column{display:grid;grid-template-columns:1fr 1fr;gap:16px}.ranking-list,.comparison-box{border:1px solid var(--border);border-radius:14px;background:var(--surface-muted);padding:14px}.ranking-row{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px solid var(--border)}.ranking-row:last-child{border-bottom:0}.comparison-box p{margin-bottom:8px}.chart-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.chart-card{min-width:0;padding:14px;border:1px solid var(--border);border-radius:14px;background:var(--surface-muted)}.chart-card h3{margin:0 0 10px}.chart-wrap{position:relative;height:300px}.bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:2147483647;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));padding:8px max(8px,env(safe-area-inset-right)) calc(8px + env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));border-top:1px solid var(--border);background:var(--surface);box-shadow:0 -4px 18px rgba(15,23,42,.14);transform:translate3d(0,0,0);-webkit-transform:translate3d(0,0,0);isolation:isolate;pointer-events:auto}.nav-button{min-width:0;min-height:48px;border:0;border-radius:12px;background:transparent;color:var(--muted);font-weight:800}.nav-button.active{background:var(--primary);color:#fff}.toast{position:fixed;left:50%;bottom:calc(85px + env(safe-area-inset-bottom));z-index:40;max-width:calc(100vw - 32px);transform:translate(-50%,140%);padding:12px 16px;border-radius:999px;background:#111827;color:#fff;opacity:0;transition:.22s}.toast.show{transform:translate(-50%,0);opacity:1}.toast button{margin-left:12px;border:0;background:transparent;color:#93c5fd;font-weight:900}.dialog{width:min(92vw,420px);padding:22px;border:1px solid var(--border);border-radius:18px;background:var(--surface);color:var(--text)}.dialog::backdrop{background:rgba(15,23,42,.6)}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}
@media(max-width:760px){.app-main{padding-inline:12px}.card{padding:16px}.form-grid,.selector-row,.two-column,.chart-grid{grid-template-columns:1fr}.field-full{grid-column:auto}.summary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.section-heading{align-items:flex-start}.transaction-top{flex-direction:column}.transaction-amount{align-self:flex-end}.chart-wrap{height:260px}.nav-button{font-size:.8rem;padding:0 2px}}

.version-badge{display:inline-block;vertical-align:middle;margin-left:8px;padding:4px 8px;border-radius:999px;background:var(--primary);color:#fff;font-size:.72rem;font-weight:900;letter-spacing:0}

.bottom-nav{isolation:isolate;pointer-events:auto}.nav-button{position:relative;z-index:1;pointer-events:auto;-webkit-tap-highlight-color:transparent}.nav-button:active{transform:scale(.98)}

/* iPhone Safari: scrollable content must never cover the bottom navigation. */
.app-main{position:relative;z-index:0;padding-bottom:48px}.app-panel,.card,.transaction-list{position:relative;z-index:0}.bottom-nav .nav-button{position:relative;z-index:2;pointer-events:auto;-webkit-appearance:none;appearance:none}.bottom-nav::before{content:"";position:absolute;inset:0;z-index:0;background:var(--surface);pointer-events:none}

/* Stage 3: backup, restore and destructive actions. */
.data-grid{display:grid;gap:16px}.data-section{padding:16px;border:1px solid var(--border);border-radius:14px;background:var(--surface-muted)}.data-section h3{margin-top:0}.data-actions{display:flex;flex-wrap:wrap;gap:10px}.helper-text{color:var(--muted);overflow-wrap:anywhere}.restore-mode{margin:16px 0;display:flex;flex-wrap:wrap;gap:12px 22px}.restore-mode legend{width:100%}.restore-mode label{display:inline-flex;align-items:center;gap:8px;min-height:44px}.restore-mode input{width:20px;height:20px}.danger-zone{border-color:color-mix(in srgb,var(--danger) 45%,var(--border))}.success-message{color:var(--income);font-weight:700}.bottom-nav{grid-template-columns:repeat(6,minmax(0,1fr))}@media(max-width:420px){.nav-button{font-size:.72rem}.data-actions .button{width:100%}}

/* Stage 4: category management and PWA polish. */
.category-manage-list{display:grid;gap:10px;margin:14px 0}.category-manage-row{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:8px;align-items:center;padding:10px;border:1px solid var(--border);border-radius:12px;background:var(--surface)}.category-manage-row strong{overflow-wrap:anywhere}.category-manage-row .button{padding-inline:12px}.inline-control{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px}.install-note{padding:12px;border-radius:12px;background:var(--surface);border:1px dashed var(--border)}
@media(max-width:480px){.category-manage-row{grid-template-columns:1fr 1fr}.category-manage-row strong{grid-column:1/-1}.inline-control{grid-template-columns:1fr}.inline-control .button{width:100%}}