:root {
    /* Dark Mode (Default) */
    --bg-base: #0f1118;
    --bg-glass: rgba(25, 28, 41, 0.6);
    --bg-glass-hover: rgba(35, 39, 56, 0.8);
    --border-glass: rgba(255, 255, 255, 0.08);

    --text-main: #e2e8f0;
    --text-muted: #94a3b8;

    --accent-primary: #6366f1;
    --accent-primary-glow: rgba(99, 102, 241, 0.4);
    --accent-success: #10b981;
    --accent-danger: #ef4444;
    --accent-warning: #f59e0b;
    --accent-info: #0ea5e9;

    --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.3);
    --font-stack: 'Outfit', sans-serif;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    /* Light Mode Overrides */
    --bg-base: #f8fafc;
    --bg-glass: rgba(255, 255, 255, 0.7);
    --bg-glass-hover: rgba(255, 255, 255, 0.9);
    --border-glass: rgba(0, 0, 0, 0.08);

    --text-main: #1e293b;
    --text-muted: #64748b;

    --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.05);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-stack);
    background-color: var(--bg-base);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color var(--transition), color var(--transition);
    /* Subtle dot background pattern */
    background-image: radial-gradient(var(--border-glass) 1px, transparent 1px);
    background-size: 40px 40px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem 4rem 2rem;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    max-width: 1200px;
    margin: 0 auto 2rem auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    letter-spacing: -0.5px;
}

.logo-icon {
    color: var(--accent-primary);
    filter: drop-shadow(0 0 8px var(--accent-primary-glow));
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    cursor: pointer;
    transition: var(--transition);
    padding: 0.5rem;
    border-radius: var(--radius-sm);
}

.icon-btn:hover {
    color: var(--text-main);
    background: var(--bg-glass);
}

.action-btn {
    background: var(--accent-primary);
    color: white;
}

.action-btn:hover {
    background: var(--accent-primary);
    transform: scale(1.05);
    color: white;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--border-glass);
}

/* Glassmorphism Utilities */
.glass-card {
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
}

/* Hero Omni Bar */
.hero-search {
    text-align: center;
    margin-bottom: 3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: var(--transition);
}

.omni-wrapper {
    position: relative;
    width: 100%;
    max-width: 650px;
    margin: 0 auto;
}

.omni-icon {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent-primary);
    font-size: 1.5rem;
}

.omni-input {
    width: 100%;
    padding: 1.25rem 1.25rem 1.25rem 3.5rem;
    font-size: 1.25rem;
    font-family: var(--font-stack);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: 100px;
    color: var(--text-main);
    backdrop-filter: blur(16px);
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    outline: none;
}

.omni-input::placeholder {
    color: var(--text-muted);
}

.omni-input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px var(--accent-primary-glow), var(--shadow-soft);
    background: var(--bg-glass-hover);
}

.omni-hint {
    margin-top: 1rem;
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 300;
}

.omni-hint b {
    color: var(--text-main);
}

/* Summary Grid */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.summary-card {
    display: flex;
    align-items: center;
    padding: 1.5rem;
    gap: 1.2rem;
}

.summary-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.15);
}

.card-icon {
    width: 55px;
    height: 55px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

/* Month Selector */
.month-selector-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

#current-month-display {
    font-size: 1.5rem;
    font-weight: 600;
    min-width: 180px;
    text-align: center;
}

.balance .card-icon {
    color: var(--accent-primary);
    background: var(--accent-primary-glow);
}

.income .card-icon {
    color: var(--accent-success);
    background: rgba(16, 185, 129, 0.15);
}

.expense .card-icon {
    color: var(--accent-danger);
    background: rgba(239, 68, 68, 0.15);
}

.savings .card-icon {
    color: var(--accent-info);
    background: rgba(14, 165, 233, 0.15);
}

.card-content h3 {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.card-content h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-top: 0.25rem;
}

/* Main Grid (List & Charts) */
.main-grid {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 2rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.transactions-section,
.analytics-section {
    padding: 2rem;
}

.text-btn {
    background: none;
    border: none;
    font-family: var(--font-stack);
    font-weight: 500;
    cursor: pointer;
    font-size: 0.9rem;
}

.text-danger {
    color: var(--accent-danger);
}

.text-danger:hover {
    text-decoration: underline;
}

.transaction-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

/* Scrollbar */
.transaction-list::-webkit-scrollbar {
    width: 6px;
}

.transaction-list::-webkit-scrollbar-track {
    background: transparent;
}

.transaction-list::-webkit-scrollbar-thumb {
    background: var(--border-glass);
    border-radius: 10px;
}

.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Transaction Item */
.tx-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.tx-item:hover {
    background: var(--bg-glass-hover);
}

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

.tx-icon {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    border: 1px solid var(--border-glass);
}

.tx-icon.expense {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

.tx-icon.income {
    color: var(--accent-success);
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.2);
}

.tx-details h4 {
    font-size: 1.05rem;
    font-weight: 500;
    text-transform: capitalize;
}

.tx-details p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.tx-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.tx-amount {
    font-weight: 600;
    font-size: 1.1rem;
}

.tx-amount.expense {
    color: var(--text-main);
}

.tx-amount.income {
    color: var(--accent-success);
}

.delete-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    opacity: 0;
    transition: var(--transition);
    font-size: 1.1rem;
}

.tx-item:hover .delete-btn {
    opacity: 1;
}

.delete-btn:hover {
    color: var(--accent-danger);
    transform: scale(1.1);
}

/* Budgets */
.budget-input {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
    flex: 1;
    justify-content: flex-end;
}

.mini-input {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glass);
    color: var(--text-main);
    padding: 0.6rem 1rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-stack);
    outline: none;
    transition: var(--transition);
    max-width: 150px;
}

.mini-input:focus {
    border-color: var(--accent-primary);
}

.budget-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 1rem;
}

.budget-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.budget-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.95rem;
    font-weight: 500;
}

.budget-track {
    height: 10px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border-glass);
}

[data-theme="light"] .budget-track {
    background: rgba(0, 0, 0, 0.05);
}

.budget-fill {
    height: 100%;
    background: var(--accent-primary);
    border-radius: 10px;
    transition: width 0.5s ease;
}

.budget-fill.warning {
    background: var(--accent-warning);
}

.budget-fill.danger {
    background: var(--accent-danger);
}

.budget-delete {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    margin-left: 10px;
    font-size: 1rem;
}

.budget-delete:hover {
    color: var(--accent-danger);
}

/* Charts */
.chart-container {
    height: 300px;
    position: relative;
    width: 100%;
}

/* Footer */
footer {
    text-align: center;
    padding: 2.5rem 1rem;
    margin-top: 4rem;
    border-top: 1px solid var(--border-glass);
    color: var(--text-muted);
    font-size: 0.95rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
}

footer a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

footer a:hover {
    color: var(--text-main);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.2rem;
}

.footer-brand i {
    color: var(--accent-primary);
}

/* Animations */
@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-10px);
    }

    75% {
        transform: translateX(10px);
    }
}

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

    .budget-input {
        justify-content: flex-start;
        width: 100%;
    }

    .mini-input {
        flex: 1;
        max-width: none;
    }
}

@media (max-width: 600px) {
    .summary-grid {
        grid-template-columns: 1fr;
    }

    .hero-search {
        margin-bottom: 2rem;
    }

    .omni-input {
        font-size: 1.1rem;
        padding: 1rem 1rem 1rem 3rem;
    }

    .tx-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .tx-right {
        width: 100%;
        justify-content: space-between;
    }

    .delete-btn {
        opacity: 1;
    }
}