/* ============================================
   50/30/20 BUDGET CALCULATOR STYLES
   Apple-inspired design system
   ============================================ */

/* ============================================
   TAB NAVIGATION BAR
   ============================================ */
.tab-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-xl);
}

.tab-nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.tab-nav-logo {
    font-size: 22px;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.tab-nav-logo span {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tab-nav-pills {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--color-input-bg);
    padding: 4px;
    border-radius: var(--radius-full);
    position: relative;
}

/* Scroll indicator for mobile */
.tab-nav-pills::after {
    content: '';
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 40px;
    background: linear-gradient(to right, transparent, var(--color-input-bg));
    border-radius: 0 var(--radius-full) var(--radius-full) 0;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

@media (max-width: 768px) {
    .tab-nav-pills::after {
        opacity: 1;
    }
}

.tab-pill {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-family);
    font-size: 14px;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    background: transparent;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.tab-pill:hover {
    color: var(--color-text-primary);
}

.tab-pill.active {
    background: var(--color-card);
    color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.tab-nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* ============================================
   TAB CONTENT SECTIONS
   ============================================ */
.tab-content {
    display: none;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.tab-content.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

/* Hide original header when tabs are active */
body.has-tabs .header {
    display: none;
}

body.has-tabs .main {
    padding-top: calc(var(--header-height) + var(--spacing-lg));
}

@media (max-width: 768px) {
    body.has-tabs .main {
        padding-top: calc(52px + var(--spacing-sm));
    }
}

/* ============================================
   BUDGET HERO SECTION
   ============================================ */
.budget-hero {
    text-align: center;
    padding: var(--spacing-md) 0 var(--spacing-xl);
}

.budget-hero-title {
    font-size: clamp(28px, 5vw, 42px);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
    line-height: 1.2;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.budget-hero-subtitle {
    font-size: 17px;
    font-weight: var(--font-weight-light);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.5;
}

/* ============================================
   INCOME INPUT SECTION
   ============================================ */
.income-section {
    max-width: 500px;
    margin: 0 auto var(--spacing-xl);
}

.income-card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: var(--spacing-xl);
    text-align: center;
}

.income-label {
    font-size: 14px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
    display: block;
}

.income-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.income-input-wrapper .input-prefix {
    position: absolute;
    left: var(--spacing-lg);
    font-size: 28px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
}

.income-input {
    width: 100%;
    max-width: 300px;
    height: 64px;
    padding: 0 var(--spacing-lg);
    padding-left: 50px;
    font-family: var(--font-family);
    font-size: 32px;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    background: var(--color-input-bg);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    outline: none;
    text-align: center;
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
    -moz-appearance: textfield;
}

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

.income-input:focus {
    border-color: var(--color-primary);
    background: var(--color-card);
}

/* Period Toggle */
.period-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.period-toggle-label {
    font-size: 13px;
    color: var(--color-text-tertiary);
}

.toggle-switch {
    position: relative;
    width: 48px;
    height: 28px;
    background: var(--color-input-bg);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.toggle-switch.active {
    background: var(--color-primary);
}

.toggle-switch::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 24px;
    height: 24px;
    background: var(--color-card);
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: transform var(--transition-fast);
}

.toggle-switch.active::after {
    transform: translateX(20px);
}

/* ============================================
   CATEGORY CARDS GRID
   ============================================ */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

@media (max-width: 1024px) {
    .categories-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   CATEGORY CARD
   ============================================ */
.category-card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    display: flex;
    flex-direction: column;
}

.category-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card-hover);
}

/* Category accent colors */
.category-card.needs .category-header {
    background: rgba(0, 113, 227, 0.08);
    border-bottom: 2px solid rgba(0, 113, 227, 0.2);
}

.category-card.wants .category-header {
    background: rgba(175, 82, 222, 0.08);
    border-bottom: 2px solid rgba(175, 82, 222, 0.2);
}

.category-card.savings .category-header {
    background: rgba(52, 199, 89, 0.08);
    border-bottom: 2px solid rgba(52, 199, 89, 0.2);
}

.category-card.needs .category-icon { color: var(--color-primary); }
.category-card.wants .category-icon { color: var(--color-purple); }
.category-card.savings .category-icon { color: var(--color-success); }

/* Category Header */
.category-header {
    padding: var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.category-header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.category-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--color-card);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.category-icon svg {
    width: 22px;
    height: 22px;
}

.category-title-group {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.category-title {
    font-size: 18px;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.category-percentage {
    font-size: 13px;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-tertiary);
}

/* Status Badge */
.status-badge {
    padding: 4px 10px;
    font-size: 11px;
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 4px;
}

.status-badge .status-icon {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.status-badge.on-track {
    background: rgba(52, 199, 89, 0.15);
    color: #2d8a47;
}

.status-badge.over-budget {
    background: rgba(255, 59, 48, 0.15);
    color: #d63030;
    animation: pulse-red 2s infinite;
}

.status-badge.under-budget {
    background: rgba(0, 113, 227, 0.15);
    color: var(--color-primary);
}

@keyframes pulse-red {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Recommended Amount */
.category-recommended {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(0, 0, 0, 0.02);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
}

.recommended-label {
    color: var(--color-text-tertiary);
}

.recommended-amount {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
}

/* Progress Gauge */
.category-gauge {
    padding: 0 var(--spacing-lg);
    padding-top: var(--spacing-md);
}

.gauge-bar {
    width: 100%;
    height: 8px;
    background: var(--color-input-bg);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.gauge-fill {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width 0.4s ease, background 0.4s ease;
    background: linear-gradient(90deg, var(--color-success) 0%, var(--color-success) 100%);
}

.gauge-fill.warning {
    background: linear-gradient(90deg, #FF9500 0%, #FF9500 100%);
}

.gauge-fill.danger {
    background: linear-gradient(90deg, #FF3B30 0%, #FF3B30 100%);
}

.gauge-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 4px;
    font-size: 11px;
    color: var(--color-text-tertiary);
}

/* Subcategories List */
.subcategories-list {
    padding: var(--spacing-md) var(--spacing-lg);
    flex: 1;
}

.subcategory-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
    gap: var(--spacing-md);
}

.subcategory-item:last-child {
    border-bottom: none;
}

.subcategory-label {
    font-size: 14px;
    color: var(--color-text-primary);
    flex: 1;
    min-width: 0;
}

.subcategory-label-input {
    background: transparent;
    border: none;
    font-family: var(--font-family);
    font-size: 14px;
    color: var(--color-text-primary);
    padding: 4px 0;
    width: 100%;
    outline: none;
    cursor: text;
}

.subcategory-label-input:hover {
    background: var(--color-input-bg);
    border-radius: 4px;
    padding: 4px 8px;
    margin: -4px -8px;
    width: calc(100% + 16px);
}

.subcategory-label-input:focus {
    background: var(--color-card);
    border: 1px solid var(--color-primary);
    border-radius: 4px;
    padding: 3px 7px;
    margin: -4px -8px;
    width: calc(100% + 16px);
}

.subcategory-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.subcategory-input-wrapper .input-prefix {
    position: absolute;
    left: 10px;
    font-size: 13px;
    color: var(--color-text-tertiary);
}

.subcategory-input {
    width: 100px;
    height: 36px;
    padding: 0 10px 0 26px;
    font-family: var(--font-family);
    font-size: 14px;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    background: var(--color-input-bg);
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    outline: none;
    text-align: right;
    transition: border-color var(--transition-fast);
    -moz-appearance: textfield;
}

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

.subcategory-input:focus {
    border-color: var(--color-primary);
    background: var(--color-card);
}

/* Category Footer */
.category-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(0, 0, 0, 0.02);
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.category-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.category-total-label {
    font-size: 14px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

.category-total-amount {
    font-size: 20px;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.category-remaining {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
}

.remaining-label {
    color: var(--color-text-tertiary);
}

.remaining-amount {
    font-weight: var(--font-weight-semibold);
}

.remaining-amount.positive {
    color: var(--color-success);
}

.remaining-amount.negative {
    color: #FF3B30;
}

.reset-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-family);
    font-size: 12px;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-top: var(--spacing-xs);
}

.reset-btn:hover {
    background: var(--color-input-bg);
    color: var(--color-text-primary);
    border-color: var(--color-text-tertiary);
}

.reset-btn svg {
    width: 14px;
    height: 14px;
}

/* ============================================
   SUMMARY BAR
   ============================================ */
.summary-section {
    margin-bottom: var(--spacing-xl);
}

.summary-card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: var(--spacing-lg);
}

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

@media (max-width: 640px) {
    .summary-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}

.summary-stat {
    text-align: center;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    background: var(--color-input-bg);
}

.summary-stat-label {
    font-size: 12px;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-tertiary);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.summary-stat-value {
    font-size: 28px;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.summary-stat.income .summary-stat-value {
    color: var(--color-primary);
}

.summary-stat.remaining .summary-stat-value.positive {
    color: var(--color-success);
}

.summary-stat.remaining .summary-stat-value.negative {
    color: #FF3B30;
}

/* Alert Banner */
.alert-banner {
    display: none;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(255, 59, 48, 0.1);
    border: 1px solid rgba(255, 59, 48, 0.3);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
    color: #d63030;
    font-size: 14px;
    font-weight: var(--font-weight-medium);
    animation: shake 0.5s ease;
}

.alert-banner.show {
    display: flex;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.alert-banner svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* ============================================
   BUDGET CHARTS SECTION
   ============================================ */
.budget-charts-section {
    margin-bottom: var(--spacing-2xl);
}

.budget-charts-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
}

@media (max-width: 900px) {
    .budget-charts-grid {
        grid-template-columns: 1fr;
    }
}

.budget-chart-card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: var(--spacing-lg);
}

.budget-chart-title {
    font-size: 18px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.budget-chart-subtitle {
    font-size: 13px;
    color: var(--color-text-tertiary);
    margin-bottom: var(--spacing-md);
}

.budget-chart-container {
    position: relative;
    height: 280px;
}

.budget-chart-container.donut {
    height: 260px;
    max-width: 260px;
    margin: 0 auto;
}

/* ============================================
   ACTION BUTTONS
   ============================================ */
.budget-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.action-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: var(--font-family);
    font-size: 15px;
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.action-btn svg {
    width: 18px;
    height: 18px;
}

.action-btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, #0077ED 100%);
    color: white;
    border: none;
    box-shadow: 0 4px 14px rgba(0, 113, 227, 0.35);
}

.action-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 113, 227, 0.45);
}

.action-btn-secondary {
    background: var(--color-card);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.action-btn-secondary:hover {
    background: var(--color-input-bg);
    border-color: var(--color-text-tertiary);
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */
@media (max-width: 768px) {
    /* Hide hero title/subtitle on mobile for budget and mortgage */
    #budgetTab .budget-hero-title,
    #budgetTab .budget-hero-subtitle,
    #mortgageTab .budget-hero-title,
    #mortgageTab .budget-hero-subtitle {
        display: none;
    }

    #budgetTab .budget-hero,
    #mortgageTab .budget-hero {
        padding: 0;
        margin: 0;
    }

    #budgetTab .income-section,
    #mortgageTab .mortgage-grid {
        margin-top: var(--spacing-sm);
    }

    .tab-nav {
        padding: 0;
        display: grid;
        grid-template-columns: 1fr auto;
        grid-template-rows: auto auto;
        height: auto;
        min-height: auto;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1001;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: saturate(180%) blur(20px);
        -webkit-backdrop-filter: saturate(180%) blur(20px);
    }

    .tab-nav-brand {
        display: flex;
        grid-column: 1;
        grid-row: 1;
        padding: 8px 12px;
        align-items: center;
    }

    .tab-nav-logo {
        font-size: 18px;
    }

    .tab-nav-right {
        grid-column: 2;
        grid-row: 1;
        display: flex;
        justify-content: flex-end;
        align-items: center;
        padding: 8px 12px;
        gap: var(--spacing-sm);
    }

    /* Hide pills on mobile - users go to home to switch calculators */
    .tab-nav-pills {
        display: none;
    }

    /* Single row layout without pills */
    .tab-nav {
        grid-template-rows: auto;
    }

    .tab-nav-right .theme-toggle {
        width: 36px;
        height: 36px;
    }

    .tab-nav-right .language-btn {
        padding: 6px 10px;
    }

    .tab-nav-right .language-current {
        display: inline;
    }

    .budget-hero-title {
        font-size: 28px;
    }

    .budget-hero-subtitle {
        font-size: 15px;
    }

    .income-input {
        font-size: 24px;
        height: 56px;
    }

    .income-input-wrapper .input-prefix {
        font-size: 22px;
    }

    .category-header {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .status-badge {
        align-self: flex-start;
    }

    .subcategory-input {
        width: 90px;
    }

    .budget-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .action-btn {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .summary-stat-value {
        font-size: 22px;
    }

    .category-total-amount {
        font-size: 18px;
    }

    .tab-nav-brand {
        padding: 6px 8px;
    }

    .tab-nav-logo {
        font-size: 16px;
    }

    .tab-nav-right {
        padding: 6px 8px;
        gap: var(--spacing-xs);
    }

    .tab-nav-right .theme-toggle {
        width: 32px;
        height: 32px;
    }

    .tab-nav-right .language-btn {
        padding: 4px 8px;
        font-size: 12px;
    }

    body.has-tabs .main {
        padding-top: calc(44px + var(--spacing-xs));
    }
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.category-card {
    animation: fadeInUp 0.5s ease-out backwards;
}

.category-card:nth-child(1) { animation-delay: 0.1s; }
.category-card:nth-child(2) { animation-delay: 0.2s; }
.category-card:nth-child(3) { animation-delay: 0.3s; }

/* Value count-up animation */
.animate-value {
    transition: color 0.3s ease;
}

/* Over budget header pulse */
.category-card.over-budget .category-header {
    animation: header-pulse 2s infinite;
}

@keyframes header-pulse {
    0%, 100% {
        background: rgba(255, 59, 48, 0.08);
    }
    50% {
        background: rgba(255, 59, 48, 0.15);
    }
}

.category-card.over-budget .category-header {
    border-bottom-color: rgba(255, 59, 48, 0.3);
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .tab-nav,
    .budget-actions,
    .reset-btn {
        display: none;
    }

    .category-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
}