/* =================================================================
   ROOT VARIABLES & GLOBAL STYLES
   ================================================================= */
   :root {
    --primary-blue: #0A488A;
    --primary-teal: #28A798;
    --accent-orange: #F58634;
    --light-gray: #F4F7F6;
    --medium-gray: #A0AEC0;
    --dark-gray: #2D3748;
    --success-green: #48BB78;
    --error-red: #E53E3E;
    --white: #FFFFFF;
    --shadow: 0 4px 8px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 20px -5px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --transition-speed: 0.3s;
}

/* Dark mode color palette */
.dark {
    --light-gray: #1A202C;
    --white: #2D3748;
    --dark-gray: #F7FAFC;
    --medium-gray: #E2E8F0;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--light-gray);
    color: var(--dark-gray);
    line-height: 1.6;
    overflow-x: hidden;
}

/* =================================================================
   MAIN LAYOUT (SIDEBAR & CONTENT)
   ================================================================= */
#app-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 250px;
    background: var(--white);
    box-shadow: var(--shadow-lg);
    position: fixed;
    height: 100%;
    left: 0;
    top: 0;
    transform: translateX(-100%);
    transition: transform var(--transition-speed) ease-in-out;
    z-index: 1000;
}

.sidebar.active {
    transform: translateX(0);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--light-gray);
}

.logo {
    font-family: 'Poppins', sans-serif;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--dark-gray);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-img {
    height: 40px;
    width: auto;
    transition: transform var(--transition-speed) ease;
}

.logo:hover .logo-img {
    transform: rotate(-10deg) scale(1.1);
}

.nav-menu {
    padding: 1rem 0;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 0.8rem 1.5rem;
    color: var(--dark-gray);
    text-decoration: none;
    transition: all var(--transition-speed) ease;
    border-left: 4px solid transparent;
    font-weight: 500;
}

.nav-item:hover {
    background: rgba(10, 72, 138, 0.05);
    color: var(--primary-blue);
    border-left-color: var(--accent-orange);
}

.nav-item.active {
    background: rgba(10, 72, 138, 0.1);
    border-left-color: var(--primary-blue);
    color: var(--primary-blue);
    font-weight: 600;
}

.nav-item i {
    width: 20px;
    margin-right: 1rem;
    text-align: center;
}

.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    width: 100%;
    transition: margin-left var(--transition-speed) ease-in-out;
}

.header {
    background: var(--white);
    padding: 1rem 2rem;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 999;
}

.menu-toggle {
    display: none; /* Hidden on desktop by default */
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--dark-gray);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background var(--transition-speed) ease, transform var(--transition-speed) ease;
}

.menu-toggle:hover {
    background: var(--light-gray);
    transform: rotate(90deg);
}

.page-title {
    font-family: 'Poppins', sans-serif;
    font-size: 1.5rem;
    font-weight: 600;
}

.content {
    padding: 2rem;
    flex-grow: 1;
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* =================================================================
   COMPONENTS (CARDS, BUTTONS, FORMS)
   ================================================================= */

/* Cards */
.card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--light-gray);
}

.card-title {
    font-family: 'Poppins', sans-serif;
    font-size: 1.125rem;
    font-weight: 600;
}

/* Summary Cards */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.summary-card {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-teal));
    color: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.summary-card:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.summary-card::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 150px;
    height: 150px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.summary-value {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

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

.btn-primary:hover {
    background: #083566;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(10, 72, 138, 0.3);
}

.btn-secondary {
    background: var(--accent-orange);
    color: white;
}

.btn-secondary:hover {
    background: #e6701a;
    transform: translateY(-2px);
}

.btn-danger {
    background-color: var(--error-red);
    color: white;
}

.btn-danger:hover {
    background-color: #c53030;
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.75rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-input, select.form-input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--medium-gray);
    border-radius: 6px;
    font-size: 1rem;
    background: var(--white);
    color: var(--dark-gray);
    transition: border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(10, 72, 138, 0.2);
}

/* =================================================================
   DATA DISPLAY (TABLES, CHARTS, BADGES)
   ================================================================= */

/* Tables */
.table-container {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.table th,
.table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--light-gray);
}

.table th {
    background: #f9fafb;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
}

.table tbody tr {
    transition: background-color var(--transition-speed) ease;
}

.table tbody tr:hover {
    background: rgba(10, 72, 138, 0.05);
}

/* Category Badges */
.category-badge {
    padding: 0.25em 0.6em;
    font-size: 0.75em;
    font-weight: 700;
    border-radius: 0.375rem;
    color: var(--white);
}

.category-income { background-color: var(--success-green); }
.category-food { background-color: var(--accent-orange); }
.category-transport { background-color: #3182CE; }
.category-shopping { background-color: #9F7AEA; }
.category-entertainment { background-color: #DD6B20; }
.category-utilities { background-color: #38A169; }
.category-other { background-color: var(--medium-gray); }

/* Progress Bars */
.progress-bar-container {
    height: 8px;
    background: var(--light-gray);
    border-radius: 4px;
    overflow: hidden;
    margin: 0.5rem 0;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-teal), var(--primary-blue));
    border-radius: 4px;
    transition: width 0.6s cubic-bezier(0.25, 1, 0.5, 1);
    animation: progressGlow 2s ease-in-out infinite alternate;
}

.progress-bar.over-budget {
    background: var(--error-red);
    animation: none;
}

@keyframes progressGlow {
    from { box-shadow: 0 0 4px rgba(40, 167, 152, 0.2); }
    to { box-shadow: 0 0 8px rgba(40, 167, 152, 0.5); }
}

/* Charts */
.chart-container {
    height: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.chart-svg path {
    transition: transform var(--transition-speed) ease, opacity 0.2s ease;
    cursor: pointer;
}

.chart-svg path:hover {
    transform: scale(1.05);
    opacity: 0.8;
}

/* =================================================================
   OVERLAYS (MODALS, LOADERS) & FOOTER
   ================================================================= */

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
}

.modal.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: modalSlideIn 0.4s cubic-bezier(0.25, 1, 0.5, 1);
    box-shadow: var(--shadow-lg);
}

@keyframes modalSlideIn {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--medium-gray);
    transition: color var(--transition-speed) ease, transform var(--transition-speed) ease;
}

.modal-close:hover {
    color: var(--dark-gray);
    transform: rotate(90deg);
}

/* Loading Spinner */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    width: 100%;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--medium-gray);
    border-top: 4px solid var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Footer */
.footer {
    background-color: var(--white);
    padding: 1.5rem 2rem;
    text-align: center;
    font-size: 0.9rem;
    margin-top: auto;
    border-top: 1px solid var(--light-gray);
    color: var(--medium-gray);
}

/* =================================================================
   RESPONSIVE DESIGN
   ================================================================= */
@media (min-width: 768px) {
    .sidebar {
        position: sticky; /* Pin sidebar on desktop */
        transform: translateX(0);
        height: 100vh;
    }

    .main-content {
        width: calc(100% - 250px);
    }
}

@media (max-width: 767px) {
    .sidebar {
        box-shadow: 0 0 40px rgba(0,0,0,0.2);
    }

    .menu-toggle {
        display: block; /* Show hamburger menu on mobile */
    }

    .content {
        padding: 1rem;
    }

    .header {
        padding: 1rem;
    }

    .page-title {
        font-size: 1.25rem;
    }

    .summary-cards,
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

/* =================================================================
   UTILITY CLASSES
   ================================================================= */
.text-success { color: var(--success-green); }
.text-error { color: var(--error-red); }
.text-right { text-align: right; }
.font-medium { font-weight: 500; }
.mb-2 { margin-bottom: 1rem; }
.ml-2 { margin-left: 0.5rem; }
.flex { display: flex; }
.justify-between { justify-content: space-between; }
.items-center { align-items: center; }
.card-divider {
    border: 0;
    height: 1px;
    background-color: var(--light-gray);
    margin: 1.5rem 0;
}
/* Basic modal styles */
.modal {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    justify-content: center;
    align-items: center;
    z-index: 9999;
  }
  .modal.active {
    display: flex;
  }
  .modal-content {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    max-width: 500px;
    width: 100%;
    position: relative;
  }