/* ============================================
   HOMEFINANCE ENTERPRISE DESIGN SYSTEM
   "Structure > Hierarchy > Function > Decoration"
   ============================================ */

:root {
    /* Enterprise Typography Stack */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

    /* Enterprise Surfaces & Backgrounds */
    --bg-app: #FFFFFF;
    --bg-page: #F8F9FA;
    --bg-surface: #FFFFFF;
    --bg-surface-subtle: #FAFAFA;
    --bg-surface-hover: #F4F5F7;
    --bg-sidebar: #F7F8FA;
    --bg-sidebar-hover: #EEF0F3;
    --bg-sidebar-active: #FFFFFF;

    /* Enterprise Text Hierarchy */
    --text-primary: #17191C;
    --text-secondary: #5F6672;
    --text-tertiary: #8A919D;
    --text-disabled: #B7BBC3;
    --text-main: #17191C;

    /* Enterprise Hairline Borders */
    --border-subtle: #E6E8EB;
    --border-secondary: #ECEDEF;
    --border-strong: #DADDE1;
    --border-regular: #D2D5DA;
    --border-focus: #2563EB;

    /* Single Primary Brand Accent */
    --primary: #2563EB;
    --primary-hover: #1D4ED8;
    --primary-light: #EFF6FF;
    --primary-glow: rgba(37, 99, 235, 0.12);

    /* Semantic Financial Indicators */
    --semantic-positive: #16A36A;
    --semantic-positive-bg: #F0FDF4;
    --semantic-negative: #D64242;
    --semantic-negative-bg: #FEF2F2;
    --semantic-warning: #D98916;
    --semantic-warning-bg: #FFFBEB;
    --semantic-info: #3974D9;
    --semantic-info-bg: #EFF6FF;

    --accent-emerald: #16A36A;
    --accent-amber: #D98916;
    --accent-rose: #D64242;

    /* Architectural Radius System (Non-bubbly) */
    --radius-control: 6px;
    --radius-button: 7px;
    --radius-input: 7px;
    --radius-menu: 8px;
    --radius-card: 8px;
    --radius-panel: 10px;
    --radius-dialog: 10px;
    --radius-full: 9999px;

    /* Architectural Shadow System (Borders first, shadows minimal) */
    --shadow-none: none;
    --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.04), 0 2px 8px rgba(0, 0, 0, 0.035);
    --shadow-2: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-card: none;
    --shadow-card-hover: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
}

/* Base Reset & Foundation */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    height: 100%;
    font-family: var(--font-sans);
    background-color: var(--bg-page);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Tabular numbers for financial precision */
.table-amount-cell,
.metric-value,
.stat-val,
.health-score-number,
.kanban-card-amount,
.category-val-text {
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum" 1;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: #D1D5DB;
    border-radius: 9999px;
}
::-webkit-scrollbar-thumb:hover {
    background: #9CA3AF;
}

/* ============================================
   APPLICATION SHELL (CLEAN ENTERPRISE LAYOUT)
   ============================================ */

.app-container {
    display: flex;
    min-height: 100vh;
    background-color: var(--bg-page);
    position: relative;
}

/* Light Architectural Sidebar */
.sidebar {
    width: 240px;
    background-color: var(--bg-sidebar);
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 40;
    border-right: 1px solid var(--border-subtle);
    user-select: none;
}

.sidebar-header {
    padding: 1.15rem 1.25rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-subtle);
    background-color: var(--bg-sidebar);
}

.sidebar-header .logo {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.sidebar-header .logo-badge {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 2px 6px;
    background: #EFF6FF;
    color: #2563EB;
    border: 1px solid #DBEAFE;
    border-radius: 4px;
}

/* Navigation Links */
.sidebar-nav {
    flex: 1;
    padding: 1rem 0.65rem;
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow-y: auto;
}

.nav-section-title {
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-tertiary);
    padding: 0.85rem 0.65rem 0.25rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.45rem 0.65rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: var(--radius-control);
    border: 1px solid transparent;
    transition: all var(--transition-fast);
    position: relative;
    height: 36px;
}

.nav-item svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    color: var(--text-tertiary);
    stroke-width: 1.75px;
    transition: color var(--transition-fast);
}

.nav-item:hover {
    color: var(--text-primary);
    background-color: var(--bg-sidebar-hover);
}

.nav-item:hover svg {
    color: var(--text-primary);
}

.nav-item.active {
    color: var(--text-primary);
    background: #FFFFFF;
    border: 1px solid var(--border-subtle);
    font-weight: 600;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
}

.nav-item.active svg {
    color: var(--primary);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: -0.65rem;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 16px;
    background: var(--primary);
    border-radius: 0 3px 3px 0;
}

.nav-item .nav-badge {
    margin-left: auto;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 1px 6px;
    border-radius: var(--radius-full);
    background: #FEE2E2;
    color: #DC2626;
}

/* Sidebar Footer Profile Widget */
.sidebar-footer {
    padding: 0.75rem;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    background-color: var(--bg-sidebar);
}

.user-profile-widget {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.45rem 0.5rem;
    border-radius: var(--radius-control);
    background: transparent;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.15s ease;
}

.user-profile-widget:hover {
    background: var(--bg-sidebar-hover);
    border-color: var(--border-subtle);
}

.user-avatar-pill {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: #2563EB;
    color: #FFFFFF;
    font-weight: 600;
    font-size: 0.775rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.user-info-text {
    flex: 1;
    min-width: 0;
}

.user-info-name {
    font-size: 0.825rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-info-email {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Main Workspace Wrapper */
.main-wrapper {
    flex: 1;
    margin-left: 240px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-page);
}

/* Top Navigation Bar */
.top-navbar {
    height: 52px;
    background-color: #FFFFFF;
    border-bottom: 1px solid var(--border-subtle);
    padding: 0 1.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 30;
}

.top-navbar-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.household-selector-wrapper {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    background: #FFFFFF;
    padding: 0.3rem 0.65rem;
    border-radius: var(--radius-control);
    border: 1px solid var(--border-subtle);
    transition: border-color var(--transition-fast);
}

.household-selector-wrapper:hover {
    border-color: var(--border-regular);
}

.household-select {
    background: transparent;
    border: none;
    font-size: 0.825rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    outline: none;
    font-family: var(--font-sans);
}

.top-navbar-right {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

/* Quick Action Trigger Button */
.btn-quick-add {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--primary);
    color: #FFFFFF;
    font-size: 0.825rem;
    font-weight: 500;
    padding: 0.4rem 0.85rem;
    border-radius: var(--radius-button);
    border: none;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.btn-quick-add:hover {
    background: var(--primary-hover);
}

/* Content Container */
.main-content {
    flex: 1;
    padding: 1.75rem 2rem 3rem;
    max-width: 1440px;
    margin: 0 auto;
    width: 100%;
}

/* Page Header */
.page-header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.page-header-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.page-header-subtitle {
    font-size: 0.825rem;
    color: var(--text-secondary);
    margin-top: 0.15rem;
}

.page-header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* ============================================
   CARD SURFACES (ENTERPRISE MINIMAL SPEC)
   ============================================ */

.saas-card {
    background: #FFFFFF;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-card);
    box-shadow: none;
    transition: border-color var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.saas-card:hover {
    border-color: var(--border-regular);
}

.saas-card-header {
    padding: 0.85rem 1.15rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-subtle);
    background: #FFFFFF;
}

.saas-card-title {
    font-size: 0.925rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

.saas-card-body {
    padding: 1.15rem;
}

/* ============================================
   BUTTONS & INPUTS SYSTEM (ENTERPRISE SAAS SPEC)
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    height: 34px;
    padding: 0 0.85rem;
    font-size: 13px;
    font-weight: 500;
    border-radius: var(--radius-button);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
    line-height: 1;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: #FFFFFF;
    border: 1px solid transparent;
}

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

.btn-secondary {
    background: #FFFFFF;
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--border-regular);
}

.btn-emerald {
    background: var(--semantic-positive);
    color: #FFFFFF;
}

.btn-emerald:hover {
    background: #15803D;
}

.btn-danger {
    background: #FFFFFF;
    color: var(--semantic-negative);
    border: 1px solid #FCA5A5;
}

.btn-danger:hover {
    background: var(--semantic-negative);
    color: #FFFFFF;
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid transparent;
}

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

.btn-sm {
    height: 28px;
    padding: 0 0.65rem;
    font-size: 12px;
}

.btn-lg {
    height: 40px;
    padding: 0 1.25rem;
    font-size: 14px;
}

/* Forms & Inputs */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.35rem;
}

.form-control {
    width: 100%;
    height: 36px;
    padding: 0 0.75rem;
    font-size: 13px;
    color: var(--text-primary);
    background: #FFFFFF;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-input);
    outline: none;
    transition: border-color var(--transition-fast);
    font-family: var(--font-sans);
}

.form-control:hover {
    border-color: var(--border-regular);
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-glow);
    background: #FFFFFF;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%238A919D' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.65rem center;
    background-size: 0.85rem;
    padding-right: 2rem;
}

/* Modals */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(4px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
}

.modal-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.modal-box {
    background: #FFFFFF;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-dialog);
    box-shadow: var(--shadow-2);
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.98);
    transition: all var(--transition-fast);
}

.modal-backdrop.active .modal-box {
    transform: scale(1) translateY(0);
}

.modal-header {
    padding: 1.5rem 1.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-subtle);
}

.modal-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
}

.modal-close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast);
}

.modal-close-btn:hover {
    color: var(--text-main);
    background: var(--bg-surface-subtle);
}

.modal-body {
    padding: 1.75rem;
}

.modal-footer {
    padding: 1.25rem 1.75rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
    border-top: 1px solid var(--border-subtle);
    background: var(--bg-surface-subtle);
    border-radius: 0 0 var(--radius-2xl) var(--radius-2xl);
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */

.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    pointer-events: none;
}

.toast-message {
    pointer-events: auto;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: #0F172A;
    color: #FFFFFF;
    padding: 0.85rem 1.25rem;
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.875rem;
    font-weight: 500;
    transform: translateY(20px);
    opacity: 0;
    animation: toastIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes toastIn {
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.toast-message.success {
    border-left: 4px solid var(--accent-emerald);
}
.toast-message.error {
    border-left: 4px solid var(--accent-rose);
}
.toast-message.info {
    border-left: 4px solid var(--primary);
}

/* Utilities */
.hidden { display: none !important; }
.text-emerald { color: var(--accent-emerald); }
.text-rose { color: var(--accent-rose); }
.text-amber { color: var(--accent-amber); }
.text-primary { color: var(--primary); }
.text-muted { color: var(--text-muted); }

/* ============================================
   NATIVE-LIKE MOBILE & TABLET RESPONSIVE SYSTEM
   ============================================ */

.mobile-menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    width: 36px;
    height: 36px;
    cursor: pointer;
    margin-right: 0.5rem;
    flex-shrink: 0;
    transition: background-color var(--transition-fast);
}

.mobile-menu-toggle:hover {
    background: var(--bg-surface-subtle);
}

.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 140;
    opacity: 0;
    transition: opacity 0.25s ease;
    pointer-events: none;
}

.sidebar-backdrop.active {
    display: block;
    opacity: 1;
    pointer-events: auto;
}

.mobile-bottom-tabbar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: rgba(11, 15, 25, 0.92);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 90;
    padding: 0 8px;
    padding-bottom: env(safe-area-inset-bottom, 0);
    grid-template-columns: repeat(5, 1fr);
    align-items: center;
    justify-content: space-around;
}

.mobile-tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: #64748B;
    font-size: 0.65rem;
    font-weight: 600;
    gap: 3px;
    height: 100%;
    transition: color 0.15s ease, transform 0.1s ease;
    user-select: none;
}

.mobile-tab-item svg {
    transition: transform 0.15s ease;
}

.mobile-tab-item:active {
    transform: scale(0.92);
}

.mobile-tab-item.active {
    color: #0071E3;
}

.mobile-tab-item.active svg {
    transform: scale(1.1);
}

@media (max-width: 1024px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-bottom-tabbar {
        display: grid;
    }

    .desktop-only-btn {
        display: none !important;
    }

    .sidebar {
        transform: translateX(-100%);
        z-index: 150;
        width: min(300px, 82vw);
        border-radius: 0 20px 20px 0;
        box-shadow: 12px 0 36px rgba(0, 0, 0, 0.55);
        border-right: 1px solid rgba(255, 255, 255, 0.1);
    }

    .sidebar.mobile-open {
        transform: translateX(0);
    }

    .sidebar-backdrop {
        background: rgba(11, 15, 25, 0.7);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
    }

    .main-wrapper {
        margin-left: 0;
        width: 100vw;
        max-width: 100vw;
        overflow-x: hidden;
    }

    .main-content {
        padding: 1rem 0.85rem calc(84px + env(safe-area-inset-bottom, 0));
        width: 100%;
        max-width: 100vw;
        box-sizing: border-box;
        overflow-x: hidden;
    }

    .top-navbar {
        padding: 0 1rem;
        height: 56px;
        width: 100vw;
        max-width: 100vw;
        box-sizing: border-box;
    }

    .topbar-superadmin-btn span,
    .desktop-btn-label {
        display: none;
    }

    /* Modal adaptation for mobile (iOS Bottom Sheet) */
    .modal-backdrop {
        padding: 0;
        align-items: flex-end;
    }

    .modal-box {
        max-width: 100% !important;
        width: 100% !important;
        border-radius: 24px 24px 0 0 !important;
        margin: 0 !important;
        max-height: 90vh;
        animation: slideUpModal 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        position: relative;
        padding-top: 0.5rem;
    }

    .modal-box::before {
        content: '';
        display: block;
        width: 40px;
        height: 5px;
        border-radius: 999px;
        background: #CBD5E1;
        margin: 6px auto 10px;
    }

    /* Prevent iOS auto-zoom on input focus */
    input, select, textarea {
        font-size: 16px !important;
    }

    @keyframes slideUpModal {
        from {
            transform: translateY(100%);
        }
        to {
            transform: translateY(0);
        }
    }
}

@media (max-width: 640px) {
    .top-navbar {
        padding: 0 10px;
        height: 52px;
        gap: 6px;
    }

    .top-navbar-left {
        gap: 6px;
        min-width: 0;
        flex: 1;
    }

    .household-selector-wrapper {
        max-width: 170px;
        padding: 0.25rem 0.5rem;
        min-width: 0;
        flex: 1;
    }

    .household-select {
        max-width: 135px;
        font-size: 0.775rem;
        text-overflow: ellipsis;
        white-space: nowrap;
        overflow: hidden;
    }

    .top-navbar-right {
        gap: 6px;
        flex-shrink: 0;
    }

    #topbarSuperadminBtn {
        padding: 0.35rem 0.5rem !important;
        margin-right: 0 !important;
    }

    .btn-quick-add {
        width: 34px;
        height: 34px;
        padding: 0;
        border-radius: 50%;
        justify-content: center;
        flex-shrink: 0;
    }

    .btn-quick-add span {
        display: none !important;
    }

    .page-header-container {
        flex-direction: column;
        align-items: stretch;
        gap: 0.85rem;
        margin-bottom: 1.25rem;
        width: 100%;
        box-sizing: border-box;
    }

    .page-header-title {
        font-size: 1.35rem;
        line-height: 1.2;
        letter-spacing: -0.03em;
        word-break: break-word;
    }

    .page-header-subtitle {
        font-size: 0.8rem;
        line-height: 1.35;
        color: var(--text-secondary);
        word-break: break-word;
    }

    .page-header-actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px;
        width: 100%;
    }

    .page-header-actions .btn {
        width: 100%;
        justify-content: center;
        padding: 0.55rem 0.5rem;
        font-size: 0.8rem;
    }
}
/* ============================================
   RESPONSIVE 480px - SMALL MOBILE
   ============================================ */
@media (max-width: 480px) {
    .top-navbar { padding: 0 8px; height: 48px; gap: 4px; }
    .top-navbar-left { gap: 4px; }
    .household-selector-wrapper { max-width: 140px; padding: 0.2rem 0.4rem; }
    .household-select { max-width: 110px; font-size: 0.725rem; }
    .main-content { padding: 0.75rem 0.6rem calc(80px + env(safe-area-inset-bottom, 0)); }
    .mobile-bottom-tabbar { height: 56px; padding: 0 4px; }
    .mobile-tab-item { font-size: 0.6rem; gap: 2px; }
    .mobile-tab-item svg { width: 18px; height: 18px; }
    .modal-box { border-radius: 20px 20px 0 0 !important; }
    .modal-header { padding: 1rem 1.15rem; }
    .modal-title { font-size: 1.1rem; }
    .modal-body { padding: 1.15rem; }
    .modal-footer { padding: 0.85rem 1.15rem; flex-wrap: wrap; }
    .page-header-title { font-size: 1.2rem; }
    .page-header-subtitle { font-size: 0.75rem; }
    .page-header-actions { grid-template-columns: 1fr; }
    .saas-card-header { padding: 0.65rem 0.85rem; }
    .saas-card-body { padding: 0.85rem; }
    .saas-card-title { font-size: 0.85rem; }
    .btn { height: 32px; padding: 0 0.65rem; font-size: 12px; }
    .btn-lg { height: 36px; padding: 0 0.9rem; font-size: 13px; }
    .form-control { height: 38px; font-size: 14px; }
    .form-label { font-size: 11.5px; }
}

/* ============================================
   RESPONSIVE 360px - VERY SMALL MOBILE
   ============================================ */
@media (max-width: 360px) {
    .top-navbar { padding: 0 6px; }
    .household-selector-wrapper { max-width: 120px; }
    .household-select { max-width: 95px; font-size: 0.7rem; }
    .main-content { padding: 0.5rem 0.45rem calc(76px + env(safe-area-inset-bottom, 0)); }
    .page-header-title { font-size: 1.05rem; }
    .btn-quick-add { width: 30px; height: 30px; }
}

/* ============================================
   RESPONSIVE CSS UTILITY CLASSES (used by JS)
   ============================================ */
.responsive-grid-2col { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.responsive-grid-2col-auto { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.responsive-grid-2fr1fr { display: grid; grid-template-columns: 2fr 1fr; gap: 1.5rem; }
.responsive-grid-auto-280 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; align-items: start; }
.responsive-grid-auto-320 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.25rem; }
.responsive-grid-auto-160 { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 0.75rem; }
.responsive-grid-auto-220 { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)) auto; gap: 0.75rem; align-items: end; }

@media (max-width: 640px) {
    .responsive-grid-2col, .responsive-grid-2fr1fr { grid-template-columns: 1fr !important; gap: 1rem; }
    .responsive-grid-auto-320, .responsive-grid-auto-280 { grid-template-columns: 1fr !important; gap: 1rem; }
    .responsive-grid-auto-160 { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)) !important; }
    .responsive-grid-auto-220 { grid-template-columns: 1fr !important; }
}
@media (max-width: 480px) {
    .responsive-grid-2col-auto { grid-template-columns: 1fr !important; }
    .responsive-grid-auto-160 { grid-template-columns: 1fr 1fr !important; }
}