:root {
    /* Paleta Modo Oscuro */
    --bg-primary: #0a0f1d;
    --bg-surface: #151e33;
    --bg-surface-elevated: #1e2942;
    --bg-input: #0f1629;

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --color-primary: #38bdf8;
    --color-primary-hover: #0284c7;
    --color-accent: #6366f1;

    --color-danger: #f87171;
    --color-danger-bg: rgba(239, 68, 68, 0.15);

    --color-fixed: #818cf8;
    --color-fixed-bg: rgba(129, 140, 248, 0.15);

    --color-personal: #34d399;
    --color-personal-bg: rgba(52, 211, 153, 0.15);

    --color-income: #10b981;
    --color-income-bg: rgba(16, 185, 129, 0.18);

    --color-expense: #ef4444;
    --color-expense-bg: rgba(239, 68, 68, 0.15);

    /* Subcategorías internas del gráfico de Mis Gastos */
    --color-fixed-piso: #6366f1;
    --color-fixed-cochera: #8b5cf6;
    --color-fixed-gasolina: #f97316;
    --color-fixed-otros: #94a3b8;
    --color-leisure: #38bdf8;
    --color-bars: #f59e0b;
    --color-treats: #ec4899;

    /* Categorías exactas Gastos Piso */
    --piso-cat-ahorro: #10b981;
    --piso-cat-alquiler: #6366f1;
    --piso-cat-gas: #f97316;
    --piso-cat-luz: #eab308;
    --piso-cat-agua: #06b6d4;
    --piso-cat-comida: #ec4899;
    --piso-cat-utiles: #8b5cf6;
    --piso-cat-otros: #64748b;

    --color-excel: #10b981;
    --color-excel-hover: #059669;

    --border-color: #273552;
    --border-subtle: #1e293b;

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 18px;

    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.45);
    --shadow-highlight: 0 0 0 1px rgba(255, 255, 255, 0.06);

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.5;
    padding-bottom: 3.5rem;
    min-height: 100vh;
    padding-top: env(safe-area-inset-top, 0px);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Envoltorio principal para escritorio y móviles */
.app-wrapper {
    width: 100%;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    background-color: var(--bg-primary);
}

.app-container {
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    padding: 1.1rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

/* ========================================================= */
/* BARRA SUPERIOR DE PESTAÑAS (SEGMENTED CONTROL MODERNO)    */
/* ========================================================= */
.main-tabs-wrapper {
    width: 100%;
    display: flex;
    justify-content: center;
    margin: 0.25rem 0 0.5rem 0;
    position: relative;
    z-index: 10;
}

.main-tabs {
    display: inline-flex;
    width: 100%;
    background-color: #0e1526;
    padding: 4px;
    border-radius: 9999px;
    border: 1px solid #23314f;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4), inset 0 1px 2px rgba(0, 0, 0, 0.5);
    gap: 4px;
    position: relative;
}

.main-tab-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    padding: 0.65rem 0.9rem;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.88rem;
    font-weight: 600;
    border-radius: 9999px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    user-select: none;
    white-space: nowrap;
}

.main-tab-btn:hover {
    color: #e2e8f0;
}

.main-tab-btn.active {
    background: linear-gradient(180deg, #243252 0%, #17223b 100%);
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.12);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.15);
    font-weight: 600;
}

.live-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background-color: #10b981;
    box-shadow: 0 0 8px #10b981;
    display: inline-block;
    animation: livePulse 2s infinite;
    margin-left: 2px;
}

@keyframes livePulse {
    0% { transform: scale(0.9); opacity: 0.7; }
    50% { transform: scale(1.3); opacity: 1; }
    100% { transform: scale(0.9); opacity: 0.7; }
}

.tab-pane {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

/* Banner de Recordatorio Destacado */
.reminder-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.25), rgba(245, 158, 11, 0.22));
    border: 1.5px solid #ef4444;
    border-radius: var(--radius-md);
    padding: 0.85rem 1rem;
    box-shadow: 0 4px 16px rgba(239, 68, 68, 0.25);
    gap: 0.75rem;
    animation: slideInDown 0.3s ease;
}

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

.reminder-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.85rem;
    line-height: 1.35;
    color: #fef2f2;
    width: 100%;
}

.reminder-icon {
    font-size: 1.4rem;
    flex-shrink: 0;
}

.reminder-text {
    display: flex;
    flex-direction: column;
}

.reminder-text strong {
    color: #fca5a5;
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
}

.reminder-text span {
    color: #cbd5e1;
    font-size: 0.8rem;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.25rem 0;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.header-brand h1 {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: #ffffff;
}

.header-subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.month-navigation {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--bg-surface);
    padding: 0.25rem 0.35rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-icon:hover {
    background: var(--bg-surface-elevated);
    color: var(--text-primary);
}

.month-input {
    background: transparent;
    border: none;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: inherit;
    outline: none;
    cursor: pointer;
    padding: 0.2rem 0.25rem;
}

.month-input::-webkit-calendar-picker-indicator {
    filter: invert(0.85);
    cursor: pointer;
}

/* Sección de Formulario Superior */
.form-section {
    background: var(--bg-surface);
    border-radius: var(--radius-lg);
    padding: 1.15rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.btn-toggle-form {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, #0284c7, #2563eb);
    color: #ffffff;
    border: none;
    padding: 0.85rem 1.1rem;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(2, 132, 199, 0.35);
    transition: all 0.2s ease;
}

.btn-toggle-form.piso-toggle {
    background: linear-gradient(135deg, #7c3aed, #4f46e5);
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.35);
}

.btn-toggle-form:hover {
    filter: brightness(1.1);
}

.btn-toggle-content {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.chevron-icon {
    transition: transform 0.25s ease;
}

.btn-toggle-form.collapsed .chevron-icon,
.calc-header-toggle.collapsed .chevron-icon {
    transform: rotate(-90deg);
}

.form-collapsible {
    transition: all 0.2s ease;
}

.form-collapsible.collapsed {
    display: none;
}

/* Entrada Rápida */
.quick-entry-box {
    margin-top: 1rem;
    padding: 0.85rem;
    background: var(--bg-input);
    border: 1px dashed #334568;
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.quick-entry-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    color: #38bdf8;
    font-weight: 600;
}

.piso-quick-label {
    color: #a78bfa;
}

.quick-entry-row {
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

.quick-entry-row input {
    flex: 1;
    min-width: 0;
}

.btn-icon-quick {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--bg-surface-elevated);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
    flex-shrink: 0;
}

.btn-icon-quick:hover {
    color: #ffffff;
    border-color: #38bdf8;
}

.btn-icon-quick.recording {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
    border-color: #f87171;
    animation: pulseMic 1.2s infinite;
}

@keyframes pulseMic {
    0% { transform: scale(1); }
    50% { transform: scale(1.08); }
    100% { transform: scale(1); }
}

.btn-quick-load {
    background-color: #38bdf8;
    color: #04101e;
    font-weight: 700;
    font-size: 0.85rem;
    padding: 0.65rem 0.85rem;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.btn-quick-load:hover {
    background-color: #7dd3fc;
}

.piso-btn-quick {
    background-color: #8b5cf6;
    color: #ffffff;
}

.piso-btn-quick:hover {
    background-color: #a78bfa;
}

.expense-form {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-subtle);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    width: 100%;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
}

input[type="text"],
input[type="number"],
input[type="date"],
select {
    width: 100%;
    padding: 0.7rem 0.85rem;
    font-size: 0.95rem;
    font-family: inherit;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: var(--bg-input);
    color: var(--text-primary);
    box-sizing: border-box;
    outline: none;
    transition: border-color 0.15s ease, background-color 0.15s ease;
}

input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(0.85);
    cursor: pointer;
}

input:focus, select:focus {
    border-color: var(--color-primary);
    background-color: var(--bg-surface-elevated);
}

select optgroup {
    background-color: var(--bg-surface);
    color: var(--text-secondary);
    font-weight: 700;
}

select option {
    background-color: var(--bg-surface-elevated);
    color: var(--text-primary);
}

/* Tarjetas y Contenedores */
.summary-section {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.summary-card {
    background: var(--bg-surface);
    border-radius: var(--radius-md);
    padding: 1.1rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.summary-card.total {
    background: linear-gradient(135deg, #1e3a8a, #0369a1);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.15);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.piso-balance-card {
    background: linear-gradient(135deg, #1e1b4b, #312e81);
    color: #ffffff;
    border: 1px solid rgba(139, 92, 246, 0.3);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.piso-balance-card.positive {
    background: linear-gradient(135deg, #064e3b, #047857);
    border-color: rgba(16, 185, 129, 0.4);
}

.piso-balance-card.negative {
    background: linear-gradient(135deg, #7f1d1d, #b91c1c);
    border-color: rgba(239, 68, 68, 0.4);
}

.piso-balance-status {
    font-size: 0.75rem;
    font-weight: 600;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.total-content {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.card-label {
    display: block;
    font-size: 0.775rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.summary-card.total .card-label,
.piso-balance-card .card-label {
    color: rgba(255, 255, 255, 0.85);
}

.card-amount {
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: #ffffff;
}

.summary-card.total .card-amount,
.piso-balance-card .card-amount {
    font-size: 1.85rem;
}

.total-icon {
    color: rgba(255, 255, 255, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
}

.summary-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem;
}

.card-indicator {
    width: 24px;
    height: 4px;
    border-radius: 9999px;
    margin-bottom: 0.5rem;
}

.fixed-indicator {
    background-color: var(--color-fixed);
    box-shadow: 0 0 10px rgba(129, 140, 248, 0.5);
}

.personal-indicator {
    background-color: var(--color-personal);
    box-shadow: 0 0 10px rgba(52, 211, 153, 0.5);
}

.income-indicator {
    background-color: var(--color-income);
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
}

.expense-indicator {
    background-color: var(--color-expense);
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.5);
}

/* Gráfico de Tarta */
.chart-section,
.list-section,
.backup-section,
.calc-section {
    background: var(--bg-surface);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.section-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: #ffffff;
    letter-spacing: -0.01em;
}

.sync-badge {
    font-size: 0.725rem;
    padding: 0.2rem 0.6rem;
    border-radius: 9999px;
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.35);
    font-weight: 600;
}

.chart-container {
    display: flex;
    align-items: center;
    justify-content: space-around;
    gap: 1rem;
    margin-top: 1rem;
    padding: 0.5rem 0;
    flex-wrap: wrap;
}

.pie-chart-wrapper {
    position: relative;
    width: 140px;
    height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.pie-chart {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.chart-center-label {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

.chart-center-text {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.chart-legend {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    flex: 1;
    min-width: 160px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 4px;
    flex-shrink: 0;
}

/* Colores leyendas Mis Gastos */
.legend-color.fixed-piso { background-color: var(--color-fixed-piso); }
.legend-color.fixed-cochera { background-color: var(--color-fixed-cochera); }
.legend-color.fixed-gasolina { background-color: var(--color-fixed-gasolina); }
.legend-color.fixed-otros { background-color: var(--color-fixed-otros); }
.legend-color.leisure { background-color: var(--color-leisure); }
.legend-color.bars { background-color: var(--color-bars); }
.legend-color.treats { background-color: var(--color-treats); }

/* Colores leyendas Gastos Piso */
.legend-color.piso-cat-ahorro { background-color: var(--piso-cat-ahorro); }
.legend-color.piso-cat-alquiler { background-color: var(--piso-cat-alquiler); }
.legend-color.piso-cat-gas { background-color: var(--piso-cat-gas); }
.legend-color.piso-cat-luz { background-color: var(--piso-cat-luz); }
.legend-color.piso-cat-agua { background-color: var(--piso-cat-agua); }
.legend-color.piso-cat-comida { background-color: var(--piso-cat-comida); }
.legend-color.piso-cat-utiles { background-color: var(--piso-cat-utiles); }
.legend-color.piso-cat-otros { background-color: var(--piso-cat-otros); }

.legend-info {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    width: 100%;
    align-items: center;
    gap: 0.5rem;
}

.legend-name {
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.legend-percent {
    font-size: 0.825rem;
    font-weight: 700;
    color: #ffffff;
}

.chart-empty-note {
    margin-top: 0.5rem;
    font-size: 0.825rem;
    color: var(--text-muted);
    text-align: center;
}

/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: background-color 0.15s ease, transform 0.05s ease;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background-color: #0284c7;
    color: #ffffff;
    margin-top: 0.3rem;
}

.btn-primary:hover {
    background-color: #0369a1;
}

.btn-piso-submit {
    background: linear-gradient(135deg, #7c3aed, #6366f1);
    color: #ffffff;
    margin-top: 0.3rem;
}

.btn-piso-submit:hover {
    filter: brightness(1.1);
}

.btn-export {
    background-color: rgba(16, 185, 129, 0.15);
    color: var(--color-excel);
    border: 1px solid rgba(16, 185, 129, 0.3);
    padding: 0.45rem 0.75rem;
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
}

.btn-export:hover {
    background-color: var(--color-excel);
    color: #ffffff;
}

/* Copia de Seguridad JSON */
.backup-section {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.backup-description {
    font-size: 0.825rem;
    color: var(--text-secondary);
}

.backup-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.btn-backup {
    background-color: rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
    border: 1px solid rgba(99, 102, 241, 0.35);
    padding: 0.6rem 0.95rem;
    font-size: 0.85rem;
    flex: 1;
    min-width: 180px;
}

.btn-backup:hover {
    background-color: #4f46e5;
    color: #ffffff;
}

.btn-backup.secondary {
    background-color: rgba(56, 189, 248, 0.15);
    color: #7dd3fc;
    border-color: rgba(56, 189, 248, 0.35);
}

.btn-backup.secondary:hover {
    background-color: #0284c7;
    color: #ffffff;
}

/* Listado y Filtros */
.list-header {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    margin-bottom: 1rem;
}

.list-title-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.filter-pills {
    display: flex;
    gap: 0.35rem;
    background: var(--bg-input);
    padding: 0.3rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    overflow-x: auto;
}

.pill {
    flex: 1;
    min-width: fit-content;
    border: none;
    background: transparent;
    padding: 0.45rem 0.65rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.pill.active {
    background-color: var(--bg-surface-elevated);
    color: #ffffff;
    box-shadow: var(--shadow-sm);
    font-weight: 600;
}

.expense-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.expense-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 0.95rem;
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    gap: 0.5rem;
    transition: border-color 0.15s ease;
}

.expense-item:hover {
    border-color: #3b507a;
}

.expense-info {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
}

.expense-concept {
    font-weight: 600;
    font-size: 0.95rem;
    color: #ffffff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.expense-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.775rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
    flex-wrap: wrap;
}

.badge {
    padding: 0.15rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: capitalize;
}

.badge-fijo {
    background-color: var(--color-fixed-bg);
    color: var(--color-fixed);
    border: 1px solid rgba(129, 140, 248, 0.3);
}

.badge-personal {
    background-color: var(--color-personal-bg);
    color: var(--color-personal);
    border: 1px solid rgba(52, 211, 153, 0.3);
}

.badge-category {
    background-color: rgba(255, 255, 255, 0.08);
    color: #e2e8f0;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.badge-gasto {
    background-color: var(--color-expense-bg);
    color: var(--color-danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge-ingreso {
    background-color: var(--color-income-bg);
    color: var(--color-income);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.expense-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.expense-amount {
    font-weight: 700;
    font-size: 1.05rem;
    color: #ffffff;
    white-space: nowrap;
}

.expense-amount.income {
    color: #34d399;
}

.btn-delete {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.btn-delete:hover {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
}

.empty-state {
    text-align: center;
    padding: 2.5rem 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.empty-icon {
    color: var(--text-muted);
}

/* ========================================================= */
/* CALCULADORA DE APORTACIÓN EQUITATIVA                      */
/* ========================================================= */
.calc-section {
    padding: 0;
    overflow: hidden;
    border: 1px solid #312e81;
    background: linear-gradient(180deg, #131b31 0%, #0d1424 100%);
}

.calc-card {
    display: flex;
    flex-direction: column;
}

.calc-header-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(139, 92, 246, 0.18));
    border: none;
    border-bottom: 1px solid #273552;
    padding: 1.05rem 1.25rem;
    color: #ffffff;
    cursor: pointer;
    text-align: left;
    transition: background-color 0.2s ease;
}

.calc-header-toggle:hover {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.18), rgba(139, 92, 246, 0.25));
}

.calc-title-box {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.calc-icon {
    font-size: 1.45rem;
    line-height: 1;
}

.calc-subtitle {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-top: 0.15rem;
}

.calc-collapsible {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
    transition: all 0.2s ease;
}

.calc-collapsible.collapsed {
    display: none;
}

.calc-form {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.calc-results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem;
}

.calc-result-box {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.95rem;
    display: flex;
    flex-direction: column;
    position: relative;
    box-shadow: var(--shadow-sm);
}

.calc-result-box.my-share {
    border-color: rgba(56, 189, 248, 0.4);
    background: linear-gradient(180deg, rgba(56, 189, 248, 0.08) 0%, rgba(15, 22, 41, 0.9) 100%);
}

.calc-result-box.partner-share {
    border-color: rgba(139, 92, 246, 0.4);
    background: linear-gradient(180deg, rgba(139, 92, 246, 0.08) 0%, rgba(15, 22, 41, 0.9) 100%);
}

.calc-result-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
    margin-bottom: 0.3rem;
}

.my-share .calc-result-label {
    color: #38bdf8;
}

.partner-share .calc-result-label {
    color: #c084fc;
}

.calc-result-amount {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: #ffffff;
    line-height: 1.2;
}

.calc-percent {
    font-size: 0.775rem;
    font-weight: 600;
    color: #94a3b8;
    margin-top: 0.25rem;
}

.btn-calc-register {
    margin-top: 0.85rem;
    padding: 0.45rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    background: rgba(56, 189, 248, 0.15);
    border: 1px solid rgba(56, 189, 248, 0.35);
    color: #38bdf8;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    transition: all 0.15s ease;
    width: 100%;
}

.btn-calc-register:hover {
    background: #0284c7;
    color: #ffffff;
    border-color: #0284c7;
}

.btn-calc-register:active {
    transform: scale(0.97);
}

.hidden {
    display: none !important;
}

@media (min-width: 480px) {
    .app-header {
        flex-wrap: nowrap;
    }
}