/* Estilos Premium para Divisor de Gastos y Cuentas Compartidas */
.split-tabs-wrapper {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0.5rem;
    flex-wrap: wrap;
}

.split-tab-btn {
    padding: 0.75rem 1.25rem;
    border: none;
    border-radius: var(--border-radius-sm);
    background: transparent;
    color: var(--color-text-secondary);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.split-tab-btn:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.split-tab-btn.active {
    background: var(--color-primary);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.35);
}

.split-tab-panel {
    display: none;
}

.split-tab-panel.active {
    display: block;
    animation: fadeIn 0.25s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Quick Split Form Grid */
.split-form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.split-form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.split-form-group label {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.split-input {
    width: 100%;
    box-sizing: border-box;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    background: var(--color-bg-dark, #0f172a);
    color: var(--color-text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.split-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Tip selection pills */
.split-pill-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.split-pill-btn {
    padding: 0.5rem 0.85rem;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.split-pill-btn:hover {
    color: var(--color-text-primary);
    border-color: var(--color-primary);
}

.split-pill-btn.active {
    background: rgba(59, 130, 246, 0.15);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* Quick Result Cards */
.split-result-hero {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(6, 182, 212, 0.08) 100%);
    border: 1px solid rgba(59, 130, 246, 0.25);
    border-radius: var(--border-radius-md);
    padding: 1.5rem;
    text-align: center;
    margin-bottom: 1.5rem;
}

.split-result-hero .amount {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 900;
    color: var(--color-cyan, #06b6d4);
    line-height: 1.1;
    margin: 0.5rem 0;
}

.split-result-kpis {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
}

.split-kpi-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    padding: 1rem;
    text-align: center;
}

.split-kpi-card .label {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.split-kpi-card .val {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--color-text-primary);
}

/* Group Mode: Participants Chips */
.split-participants-bar {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.split-chips-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.split-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(59, 130, 246, 0.12);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: var(--color-text-primary);
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 600;
}

.split-chip-remove {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    transition: color 0.15s;
}

.split-chip-remove:hover {
    color: #ef4444;
}

/* Group Split Checkboxes */
.split-beneficiaries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.5rem;
    margin-top: 0.5rem;
    padding: 0.75rem;
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
}

.split-checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.88rem;
    color: var(--color-text-primary);
    cursor: pointer;
}

/* Balance Cards */
.split-balances-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.split-balance-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    padding: 1rem;
    border-left: 4px solid var(--color-border);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.split-balance-card.positive {
    border-left-color: #10b981;
}

.split-balance-card.negative {
    border-left-color: #ef4444;
}

.split-balance-card.zero {
    border-left-color: #64748b;
}

.split-balance-card .name {
    font-weight: 700;
    font-size: 1rem;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.split-balance-card .spent {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.split-balance-card .net {
    font-size: 1.25rem;
    font-weight: 800;
    margin-top: 0.5rem;
}

.split-balance-card.positive .net { color: #10b981; }
.split-balance-card.negative .net { color: #ef4444; }
.split-balance-card.zero .net { color: var(--color-text-muted); }

/* Settlement Transfers List */
.split-settlement-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
}

.split-settlement-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(16, 185, 129, 0.05);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--border-radius-sm);
    padding: 0.85rem 1.25rem;
    font-size: 0.95rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.split-settlement-item .payer {
    font-weight: 700;
    color: #ef4444;
}

.split-settlement-item .receiver {
    font-weight: 700;
    color: #10b981;
}

.split-settlement-item .bizum-badge {
    background: #00a499;
    color: white;
    font-size: 0.72rem;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 4px;
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

/* Expenses Log Table */
.split-expenses-table-wrap {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-top: 1rem;
}

.split-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    text-align: left;
}

.split-table th {
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 2px solid var(--color-border);
    color: var(--color-text-secondary);
    font-weight: 700;
}

.split-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-primary);
}

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

/* Action Bar */
.split-actions-bar {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
}

.split-btn {
    padding: 0.75rem 1.25rem;
    border: none;
    border-radius: var(--border-radius-sm);
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
}

.split-btn-primary {
    background: linear-gradient(135deg, var(--color-primary, #3b82f6) 0%, var(--color-cyan, #06b6d4) 100%);
    color: #ffffff;
}

.split-btn-primary:hover {
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.35);
    transform: translateY(-1px);
}

.split-btn-whatsapp {
    background: #25D366;
    color: #ffffff;
}

.split-btn-whatsapp:hover {
    background: #20ba5a;
    box-shadow: 0 4px 14px rgba(37, 211, 102, 0.35);
    transform: translateY(-1px);
}

.split-btn-outline {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
}

.split-btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-primary);
}

.split-btn-danger {
    background: transparent;
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: #ef4444;
}

.split-btn-danger:hover {
    background: rgba(239, 68, 68, 0.1);
}

/* Responsive adjustments */
@media (max-width: 600px) {
    .split-tabs-wrapper {
        flex-direction: column;
    }
    .split-tab-btn {
        width: 100%;
        justify-content: center;
    }
    .split-actions-bar {
        flex-direction: column;
    }
    .split-actions-bar .split-btn {
        width: 100%;
        justify-content: center;
    }
}