:root {
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --card-border: #f1f5f9;
    --text-main: #1e293b;
    --text-muted: #64748b;
    
    --color-income: #10b981;
    --color-income-bg: #e6f4ea;
    --color-expense: #f43f5e;
    --color-expense-bg: #ffe4e6;
    --color-saving: #0284c7;
    --color-saving-bg: #e0f2fe;
    --color-balance: #8b5cf6;
    --color-balance-bg: #f3e8ff;

    --primary-gradient: linear-gradient(135deg, #fb7185 0%, #a855f7 100%);
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 12px;
    --font-sans: 'Prompt', 'Kanit', -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(at 10% 10%, rgba(254, 226, 226, 0.6) 0px, transparent 40%),
        radial-gradient(at 90% 90%, rgba(224, 231, 255, 0.6) 0px, transparent 40%),
        radial-gradient(at 50% 50%, rgba(243, 232, 255, 0.4) 0px, transparent 60%);
    background-attachment: fixed;
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    overflow-x: hidden;
}

.app-container {
    width: 100%;
    max-width: 430px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    padding-bottom: 90px;
}

/* Header */
.app-header {
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.app-logo {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #f472b6 0%, #38bdf8 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 12px rgba(244, 114, 182, 0.3);
    font-size: 1.2rem;
}

.app-title {
    font-size: 1.15rem;
    font-weight: 700;
    line-height: 1.2;
    color: #0f172a;
}

.app-subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Badges */
.badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}

.badge-warning {
    background: #fef3c7;
    color: #d97706;
}

.badge-success {
    background: #d1fae5;
    color: #059669;
}

.dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: currentColor;
}

/* Viewport & Pages */
.content-viewport {
    padding: 16px;
    flex: 1;
}

.page-view {
    display: none;
    animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.page-view.active {
    display: block;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Minimalist Clean Cards */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.03);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.card-title {
    font-size: 1.05rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
    color: #1e293b;
}

.card-title i {
    color: #a855f7;
}

/* KPI Cards Grid */
.kpi-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 16px;
}

.kpi-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    border: 1px solid var(--card-border);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
    transition: transform 0.2s;
}

.kpi-card:active {
    transform: scale(0.98);
}

.kpi-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.kpi-icon {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-income .kpi-icon { background: var(--color-income-bg); color: var(--color-income); }
.card-expense .kpi-icon { background: var(--color-expense-bg); color: var(--color-expense); }
.card-saving .kpi-icon { background: var(--color-saving-bg); color: var(--color-saving); }
.card-balance .kpi-icon { background: var(--color-balance-bg); color: var(--color-balance); }

.kpi-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
}

.kpi-value {
    font-size: 1.1rem;
    font-weight: 700;
}

.card-income .kpi-value { color: var(--color-income); }
.card-expense .kpi-value { color: var(--color-expense); }
.card-saving .kpi-value { color: var(--color-saving); }
.card-balance .kpi-value { color: var(--color-balance); }

/* Segmented Control / Toggles */
.segmented-control {
    display: flex;
    background: #f1f5f9;
    padding: 4px;
    border-radius: 14px;
}

.segmented-btn {
    border: none;
    background: transparent;
    color: var(--text-muted);
    padding: 6px 12px;
    font-size: 0.78rem;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
}

.segmented-btn.active {
    background: #ffffff;
    color: #0f172a;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Filter Controls */
.chart-filters {
    margin-bottom: 14px;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Chart Container */
.chart-container {
    position: relative;
    width: 100%;
    height: 230px;
    margin: 10px 0;
}

.chart-center-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -75%);
    text-align: center;
    pointer-events: none;
}

.center-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    display: block;
}

.center-value {
    font-size: 1.15rem;
    font-weight: 700;
    color: #0f172a;
}

/* Budget Progress Bars */
.budget-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.budget-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.budget-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.82rem;
}

.budget-cat {
    font-weight: 600;
    color: #334155;
}

.budget-amounts {
    color: var(--text-muted);
    font-size: 0.78rem;
}

.progress-bar-bg {
    width: 100%;
    height: 10px;
    background: #f1f5f9;
    border-radius: 6px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    border-radius: 6px;
    transition: width 0.4s ease;
}

/* Form Styles */
.form-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: #0f172a;
}

.type-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
    margin-bottom: 22px;
}

.type-tab {
    padding: 12px 6px;
    border-radius: var(--radius-sm);
    border: 1px solid #e2e8f0;
    background: #f8fafc;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.type-tab.active.tab-expense { background: var(--color-expense-bg); color: var(--color-expense); border-color: var(--color-expense); }
.type-tab.active.tab-income { background: var(--color-income-bg); color: var(--color-income); border-color: var(--color-income); }
.type-tab.active.tab-saving { background: var(--color-saving-bg); color: var(--color-saving); border-color: var(--color-saving); }

.form-field {
    margin-bottom: 16px;
}

.form-field label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    font-weight: 600;
    color: #475569;
    margin-bottom: 8px;
}

.form-input, .form-select {
    width: 100%;
    padding: 14px 18px;
    background-color: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    color: #0f172a;
    font-size: 0.92rem;
    font-weight: 500;
    outline: none;
    transition: all 0.2s ease;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.form-select {
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2094a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'></polyline></svg>");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 42px;
    cursor: pointer;
}

.form-input:hover, .form-select:hover {
    background-color: #ffffff;
    border-color: #cbd5e1;
}

.form-input:focus, .form-select:focus {
    border-color: #a855f7;
    background-color: #ffffff;
    box-shadow: 0 0 0 4px rgba(168, 85, 247, 0.08);
}

.btn {
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    border: none;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s;
}

.btn:active { transform: scale(0.98); }
.btn-primary { 
    background: linear-gradient(135deg, #a855f7 0%, #6366f1 100%);
    color: white;
    box-shadow: 0 6px 20px rgba(168, 85, 247, 0.3);
}
.btn-secondary { background: #f1f5f9; color: #334155; }
.btn-block { width: 100%; }

/* Transaction List */
.history-controls {
    margin-bottom: 16px;
}

.history-tabs {
    width: 100%;
}

.history-tabs .segmented-btn {
    flex: 1;
    text-align: center;
}

.transaction-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.tx-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-md);
    transition: transform 0.15s;
}

.tx-item:active { transform: scale(0.99); }

.tx-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.tx-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.tx-income .tx-icon { background: var(--color-income-bg); color: var(--color-income); }
.tx-expense .tx-icon { background: var(--color-expense-bg); color: var(--color-expense); }
.tx-saving .tx-icon { background: var(--color-saving-bg); color: var(--color-saving); }

.tx-details {
    display: flex;
    flex-direction: column;
}

.tx-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: #0f172a;
}

.tx-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.tx-amount {
    font-size: 1rem;
    font-weight: 700;
}

.tx-income .tx-amount { color: var(--color-income); }
.tx-expense .tx-amount { color: var(--color-expense); }
.tx-saving .tx-amount { color: var(--color-saving); }

/* Settings View */
.settings-section {
    margin-bottom: 22px;
}

.settings-section h3 {
    font-size: 0.92rem;
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    color: #475569;
}

.status-box {
    padding: 14px;
    border-radius: var(--radius-sm);
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    font-size: 0.85rem;
    line-height: 1.6;
}

.settings-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 14px;
    line-height: 1.5;
}

.budget-overview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.budget-overview-card {
    padding: 12px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.budget-ov-cat {
    font-size: 0.78rem;
    font-weight: 600;
    color: #475569;
}

.budget-ov-val {
    font-size: 0.95rem;
    font-weight: 700;
    color: #a855f7;
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 430px;
    height: 72px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(226, 232, 240, 0.8);
    display: flex;
    flex-direction: row;
    justify-content: space-evenly;
    align-items: center;
    z-index: 1000;
    padding-bottom: env(safe-area-inset-bottom);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.03);
}

.nav-item {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    padding: 10px 0;
    transition: all 0.2s ease;
}

.nav-item.active {
    color: #a855f7;
}

.nav-item i {
    width: 24px;
    height: 24px;
}

/* Toast */
.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: #0f172a;
    color: white;
    padding: 12px 24px;
    border-radius: 30px;
    font-size: 0.88rem;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 2000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}