/* CSS Variables for theming */
:root {
    --primary-color: #4a6fa5; /* Blue */
    --primary-dark: #345a8a;
    --secondary-color: #5d9e7b; /* Green */
    --secondary-dark: #488762;
    --accent-color: #c17a9a; /* Pink */
    --danger-color: #e74c3c; /* Red */
    --danger-color-dark: #c0392b;
    --text-color: #2c3e50;
    --text-light: #7f8c8d;
    --bg-color: #e0e6e8; /* Slightly darker background */
    --card-bg: #f0f4f6; /* Slightly darker card background */
    --header-bg: linear-gradient(135deg, #345a8a, #488762); /* Darker header gradient */
    --nav-bg: linear-gradient(135deg, #2c4c75, #3b6e50); /* Darker navigation gradient */
    --border-color: #d0d8dc;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --radius: 0.5rem;
}

/* Dark theme variables */
[data-theme="dark"] {
    --primary-color: #aaaaaa; /* Light gray */
    --primary-dark: #999999;
    --secondary-color: #888888; /* Medium gray */
    --secondary-dark: #777777;
    --accent-color: #666666; /* Dark gray */
    --danger-color: #ff3333; /* Brighter red for dark theme */
    --danger-color-dark: #cc0000;
    --text-color: #f0f0f0;
    --text-light: #cccccc;
    --bg-color: #222222;
    --card-bg: #333333;
    --header-bg: #222222;
    --nav-bg: #1a1a1a;
    --border-color: #444444;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.2);
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    transition: var(--transition);
    min-height: 100vh;
    background: linear-gradient(-45deg, #c5d8e8, #c2e5e8, #cae3cc, #e5d3e7);
    background-size: 400% 400%;
    animation: gradient-bg 15s ease infinite;
    background-attachment: fixed;
}

@keyframes gradient-bg {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Add a glass morphism effect to the container */
.glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow);
}

[data-theme="dark"] .glass {
    background: rgba(31, 41, 55, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Header styles */
header {
    background: var(--header-bg);
    color: white;
    padding: 1.5rem;
    text-align: center;
    border-radius: var(--radius) var(--radius) 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
    z-index: 10;
}

header::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 200%;
    height: 100%;
    background: linear-gradient(90deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.2) 50%, rgba(255,255,255,0) 100%);
    animation: header-shine 3s infinite linear;
    pointer-events: none;
}

@keyframes header-shine {
    from { transform: translateX(-50%); }
    to { transform: translateX(0%); }
}

header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0) 70%);
    transform: rotate(30deg);
    z-index: 0;
}

header h1 {
    position: relative;
    z-index: 1;
    font-weight: 800;
    letter-spacing: -0.025em;
    font-size: 1.875rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3), 0 0 10px rgba(255,255,255,0.5);
    color: white;
    background: rgba(0,0,0,0.2);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
}

header h1 i {
    margin-right: 10px;
    animation: pulse 2s infinite;
    filter: drop-shadow(0 0 8px rgba(255,255,255,0.8));
    color: #ffdd57; /* Gold color for the icon */
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* Theme toggle button */
.theme-toggle {
    position: relative;
    z-index: 1;
}

.theme-toggle-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.2);
    transition: var(--transition);
}

.theme-toggle-btn:hover {
    background-color: rgba(0, 0, 0, 0.3);
    transform: scale(1.1);
}

.theme-toggle-btn .fa-sun {
    color: #f1c40f;
    position: absolute;
    opacity: 1;
    transition: var(--transition);
}

.theme-toggle-btn .fa-moon {
    color: #f1c40f;
    position: absolute;
    opacity: 0;
    transition: var(--transition);
}

/* Dark theme toggle state */
[data-theme="dark"] .theme-toggle-btn .fa-sun {
    opacity: 0;
    transform: rotate(180deg);
}

[data-theme="dark"] .theme-toggle-btn .fa-moon {
    opacity: 1;
    transform: rotate(0);
}

[data-theme="light"] .theme-toggle-btn .fa-sun {
    opacity: 1;
    transform: rotate(0);
}

[data-theme="light"] .theme-toggle-btn .fa-moon {
    opacity: 0;
    transform: rotate(-180deg);
}

/* Navigation styles */
nav {
    background: var(--nav-bg);
    border-radius: 0 0 var(--radius) var(--radius);
    box-shadow: var(--shadow);
    position: relative;
    z-index: 5;
    overflow: hidden;
}

nav::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color), var(--accent-color), var(--secondary-color), var(--primary-color));
    background-size: 200% 100%;
    animation: nav-border-flow 3s linear infinite;
}

@keyframes nav-border-flow {
    0% { background-position: 0% 0; }
    100% { background-position: 200% 0; }
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    flex: 1;
    text-align: center;
}

nav ul li a {
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    padding: 1rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.05);
    margin: 0 2px;
    border-radius: 4px;
}

nav ul li a i {
    margin-right: 8px;
    transition: transform 0.3s;
}

nav ul li a:hover i, nav ul li a.active i {
    transform: scale(1.2) rotate(5deg);
}

nav ul li a::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0);
    transition: var(--transition);
    z-index: -1;
}

nav ul li a:hover::before, nav ul li a.active::before {
    background-color: rgba(255, 255, 255, 0.2);
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
    transform: translateX(-50%);
}

nav ul li a:hover::after, nav ul li a.active::after {
    width: 80%;
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
}

/* Main content styles */
main {
    background-color: var(--card-bg);
    padding: 1.5rem;
    margin-top: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    position: relative;
    z-index: 1;
    border: 1px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(5px);
}

/* Card style for elements */
.card {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border: none;
    transition: var(--transition);
    animation: slideIn 0.5s ease-out;
    position: relative;
    overflow: hidden;
    border-top: 3px solid transparent;
    border-image: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    border-image-slice: 1;
    background-image: linear-gradient(to bottom, rgba(255,255,255,0.9), rgba(255,255,255,0.7));
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: var(--transition);
}

.card:hover::before {
    opacity: 1;
}

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

@keyframes slideIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

section {
    display: none;
    padding: 20px 0;
}

section.active-section {
    display: block;
}

h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

h2 i {
    color: var(--secondary-color);
}

h3 {
    color: var(--primary-color);
    margin: 20px 0 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

h3 i {
    color: var(--secondary-color);
}

/* Form styles */
.form-group {
    margin-bottom: 1.25rem;
    position: relative;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
    transition: var(--transition);
    font-size: 0.875rem;
    letter-spacing: 0.025em;
}

input, select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    background-color: var(--card-bg);
    color: var(--text-color);
    transition: var(--transition);
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

input:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25);
}

input:hover, select:hover {
    border-color: var(--primary-color);
}

/* Custom datepicker styles */
.datepicker {
    position: relative;
    cursor: pointer;
}

.datepicker::after {
    content: "\f133"; /* Calendar icon */
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--primary-color);
    pointer-events: none;
}

/* Calendar popup */
.calendar-popup {
    position: absolute;
    z-index: 1000;
    background-color: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 1rem;
    width: 300px;
    display: none;
    animation: fadeIn 0.2s ease-out;
}

.calendar-popup.show {
    display: block;
}

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

.calendar-header button {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--primary-color);
    cursor: pointer;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.calendar-header button:hover {
    background-color: rgba(99, 102, 241, 0.1);
}

.calendar-month-year {
    font-weight: 600;
    font-size: 1rem;
}

.calendar-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
    text-align: center;
}

.calendar-day-name {
    font-weight: 600;
    font-size: 0.75rem;
    color: var(--text-light);
    text-transform: uppercase;
}

.calendar-day {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
}

.calendar-day:hover {
    background-color: rgba(99, 102, 241, 0.1);
}

.calendar-day.selected {
    background-color: var(--primary-color);
    color: white;
}

.calendar-day.today {
    border: 2px solid var(--primary-color);
    font-weight: 600;
}

.calendar-day.disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.calendar-day.other-month {
    opacity: 0.3;
}

.btn {
    background-image: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    letter-spacing: 0.025em;
    overflow: hidden;
}

.btn i {
    margin-right: 0.5rem;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.btn:hover::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    animation: btn-shine 1.5s ease-in-out infinite;
}

@keyframes btn-shine {
    0% {
        transform: skewX(-45deg) translateX(-150%);
    }
    100% {
        transform: skewX(-45deg) translateX(150%);
    }
}

.btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn-small {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
    margin-left: 0.5rem;
}

/* Add floating labels */
.form-group.floating {
    position: relative;
}

.form-group.floating label {
    position: absolute;
    top: 0.75rem;
    left: 1rem;
    background-color: var(--card-bg);
    padding: 0 0.25rem;
    transition: var(--transition);
    pointer-events: none;
}

.form-group.floating input:focus + label,
.form-group.floating input:not(:placeholder-shown) + label,
.form-group.floating select:focus + label,
.form-group.floating select:not([value=""]):not(:focus) + label {
    top: -0.5rem;
    left: 0.75rem;
    font-size: 0.75rem;
    color: var(--primary-color);
    font-weight: 600;
}

/* Table styles */
.table-container {
    overflow-x: auto;
    margin-top: 1.25rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* Table container */
.table-container {
    width: 100%;
    overflow-x: auto;
    margin-top: 1rem;
    padding: 0;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 0.625rem;
    border-radius: var(--radius);
    overflow: hidden;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
}

th i {
    font-size: 1rem;
}

tr {
    transition: var(--transition);
    position: relative;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover {
    background-color: rgba(99, 102, 241, 0.08);
    transform: translateY(-2px);
    z-index: 1;
}

/* Expense actions */
.actions {
    width: 50px;
    text-align: center;
}

.delete-expense-btn {
    background: none;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
    opacity: 0.7;
    padding: 5px;
    border-radius: 50%;
}

.delete-expense-btn:hover {
    color: var(--danger-color-dark);
    opacity: 1;
    transform: scale(1.1);
    background-color: rgba(239, 68, 68, 0.1);
}

.delete-expense-btn:active {
    transform: scale(0.95);
}

tr:hover td {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* Add animation to table rows */
tr {
    animation: fadeInUp 0.3s ease-out forwards;
    opacity: 0;
    transform: translateY(10px);
}

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

/* Stagger animation for rows */
tr:nth-child(1) { animation-delay: 0.05s; }
tr:nth-child(2) { animation-delay: 0.1s; }
tr:nth-child(3) { animation-delay: 0.15s; }
tr:nth-child(4) { animation-delay: 0.2s; }
tr:nth-child(5) { animation-delay: 0.25s; }
tr:nth-child(6) { animation-delay: 0.3s; }
tr:nth-child(7) { animation-delay: 0.35s; }
tr:nth-child(8) { animation-delay: 0.4s; }
tr:nth-child(9) { animation-delay: 0.45s; }
tr:nth-child(10) { animation-delay: 0.5s; }

/* Utility classes */
.text-center {
    text-align: center;
}

/* Category badge */
.category-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    background-color: var(--primary-color);
    color: white;
    box-shadow: var(--shadow);
    transition: var(--transition);
    min-width: 100px;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Category badges with gradient */
.category-badge {
    background-image: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    position: relative;
    overflow: hidden;
}

.category-badge::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(255,255,255,0.1), rgba(255,255,255,0.3));
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.category-badge:hover::after {
    transform: translateX(0);
}

/* Special styles for category badges in categories section */
#categories-list .category-badge {
    flex-grow: 1;
    margin-right: 10px;
    min-width: 150px;
}

/* Amount styling */
.amount {
    font-weight: 600;
    color: var(--secondary-color);
    font-family: 'Inter', monospace;
    transition: var(--transition);
}

tr:hover .amount {
    transform: scale(1.05);
}

/* Date styling */
.date {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* Reports section styles */
.report-options {
    padding: 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.date-range {
    width: 100%;
}

#report-results {
    margin-top: 2rem;
    animation: fadeIn 0.5s ease-out;
}

#chart-container {
    margin: 1.5rem 0;
    height: 400px;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    background-color: rgba(255, 255, 255, 0.5);
    transition: var(--transition);
}

[data-theme="dark"] #chart-container {
    background-color: rgba(31, 41, 55, 0.5);
}

#chart-container:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

#report-summary {
    padding: 1.5rem;
    border-radius: var(--radius);
    background-color: var(--card-bg);
    box-shadow: var(--shadow);
    animation: slideIn 0.5s ease-out;
}

/* Categories section styles */
.category-form {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    margin-bottom: 1.5rem;
}

.category-form .form-group {
    flex: 1;
    margin-bottom: 0;
}

#categories-list {
    list-style: none;
    margin-top: 1rem;
    padding: 0.5rem;
}

#categories-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

#categories-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background-color: var(--primary-color);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

#categories-list li:hover::before {
    transform: scaleY(1);
}

#categories-list li:last-child {
    border-bottom: none;
}

#categories-list li:hover {
    background-color: rgba(99, 102, 241, 0.05);
    transform: translateX(5px);
}

.delete-category {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    opacity: 0.8;
}

.delete-category:hover {
    opacity: 1;
    transform: scale(1.05);
    background-color: var(--accent-color);
}

/* Footer styles */
footer {
    text-align: center;
    margin-top: 20px;
    padding: 20px;
    color: var(--text-light);
    border-top: 1px solid var(--border-color);
    transition: var(--transition);
}

footer i {
    color: var(--accent-color);
    animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
    0% { transform: scale(1); }
    25% { transform: scale(1.1); }
    50% { transform: scale(1); }
    75% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* Toast notifications */
.toast {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    padding: 1rem 1.5rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    display: flex;
    align-items: center;
    max-width: 24rem;
    font-weight: 500;
}

.toast::before {
    content: '';
    margin-right: 0.75rem;
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast.success {
    background-color: var(--secondary-color);
}

.toast.success::before {
    content: '\f00c'; /* fa-check */
}

.toast.error {
    background-color: var(--accent-color);
}

.toast.error::before {
    content: '\f071'; /* fa-exclamation-triangle */
}

/* Add animation to toast */
@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.show {
    animation: slideInRight 0.3s forwards;
}

/* Calendar styles */
.calendar-container {
    position: fixed; /* Changed to fixed positioning */
    background-color: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    z-index: 9999; /* Very high z-index to ensure it's above everything */
    overflow: hidden;
    border: 1px solid var(--border-color);
    display: none; /* Initially hidden */
    max-height: 400px; /* Limit height for very large calendars */
    overflow-y: auto; /* Allow scrolling if needed */
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    background-color: var(--primary-color);
    color: white;
    box-shadow: none;
    border-radius: var(--radius) var(--radius) 0 0;
}

.calendar-header button {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    font-size: 1rem;
    font-weight: normal;
    cursor: pointer;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: var(--transition);
    margin: 0 5px;
    padding: 0;
    line-height: 1;
}

.calendar-header button:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.calendar-header button:active {
    background-color: rgba(255, 255, 255, 0.3);
}

.month-year-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.month-display {
    margin-bottom: 5px;
}

.year-selector {
    display: flex;
    align-items: center;
    justify-content: center;
}

.year-display {
    margin: 0 5px;
    font-weight: 600;
}

.year-nav-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 0.8rem;
    cursor: pointer;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.year-nav-btn:hover {
    background-color: rgba(255, 255, 255, 0.4);
    transform: scale(1.1);
}

.weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    padding: 10px 0;
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
}

.weekdays div {
    font-weight: 600;
    font-size: 0.8rem;
    color: var(--text-light);
}

.days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    padding: 10px;
    gap: 5px;
}

.day {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 32px;
    width: 32px;
    margin: 2px auto;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    user-select: none; /* Prevent text selection */
}

.day:hover {
    background-color: var(--primary-color);
    color: white;
}

.day:active {
    opacity: 0.8;
}

.day.empty {
    cursor: default;
}

.day.today {
    background-color: rgba(51, 51, 51, 0.1);
    font-weight: bold;
}

.day.selected {
    background-color: var(--primary-color);
    color: white;
}

/* Categories styles */
#categories-list {
    list-style: none;
    padding: 20px;
    margin-top: 20px;
}

.category-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    margin-bottom: 10px;
    background-color: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.category-item:hover {
    box-shadow: var(--shadow-md);
}

/* Removed .category-item span styles as we're now using category-badge */

.delete-category-btn {
    background: none;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
}

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

/* Responsive adjustments */
@media (max-width: 768px) {
    /* Layout adjustments */
    body {
        font-size: 14px;
    }

    .container {
        padding: 0.5rem;
    }

    header {
        padding: 1rem;
        flex-direction: column;
        text-align: center;
    }

    header h1 {
        margin-bottom: 0.5rem;
        font-size: 1.5rem;
    }

    main {
        padding: 0.5rem;
        margin-top: 0.5rem;
    }

    .card {
        padding: 0.5rem;
        margin-bottom: 0.5rem;
    }

    .card.glass {
        backdrop-filter: none;
    }

    h2 {
        font-size: 1.2rem;
        margin-bottom: 0.5rem;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    h2 i {
        margin-right: 0.5rem;
    }

    /* Form adjustments */
    .category-form {
        flex-direction: column;
    }

    .form-group {
        margin-bottom: 1rem;
    }

    .date-range {
        width: 100%;
    }

    /* Navigation adjustments */
    nav {
        overflow-x: auto;
    }

    nav ul {
        flex-direction: row;
        flex-wrap: nowrap;
        overflow-x: auto;
        padding: 0.5rem;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none; /* Firefox */
    }

    nav ul::-webkit-scrollbar {
        display: none; /* Chrome, Safari, Edge */
    }

    nav ul li {
        flex: 0 0 auto;
        margin-right: 0.5rem;
    }

    nav ul li a {
        padding: 0.75rem 1rem;
        white-space: nowrap;
    }

    /* Table container adjustments */
    .table-container {
        margin: 0.25rem 0;
        padding: 0;
        max-width: 100%;
        overflow-x: hidden;
        border-radius: 0.25rem;
    }

    .table-container.card {
        padding: 0.25rem;
        box-shadow: none;
        border: 1px solid var(--border-color);
    }

    /* Table adjustments */
    .expenses-table {
        display: block;
        width: 100%;
        border-collapse: collapse;
        box-shadow: none;
        margin: 0;
    }

    .expenses-table thead {
        display: none; /* Hide table header on mobile */
    }

    /* Show table header on larger screens */
    @media (min-width: 769px) {
        .expenses-table thead {
            display: table-header-group;
        }
    }

    .expenses-table tbody {
        display: block;
        width: 100%;
    }

    .expenses-table tr {
        display: flex;
        flex-wrap: wrap;
        margin-bottom: 0.5rem;
        border: 1px solid var(--border-color);
        border-radius: 0.25rem;
        background-color: var(--card-bg);
        box-shadow: none;
        padding: 0.25rem;
    }

    .expenses-table td {
        display: flex;
        justify-content: space-between;
        padding: 0.25rem;
        text-align: right;
        border-bottom: 1px solid var(--border-color);
        min-height: 36px;
        align-items: center;
        flex: 1 0 100%;
    }

    .expenses-table td:last-child {
        border-bottom: none;
    }

    .expenses-table td::before {
        content: attr(data-label);
        font-weight: 600;
        text-align: left;
    }

    .expenses-table .actions {
        justify-content: center;
        width: auto;
        border-bottom: none;
        padding: 0.5rem 0;
        min-height: auto;
    }

    .expenses-table td.actions::before {
        content: none; /* Remove the label for actions column */
    }

    /* Category badges adjustments */
    .category-badge {
        min-width: 80px;
        font-size: 0.8rem;
        padding: 0.2rem 0.5rem;
        margin: 0;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    /* Calendar adjustments */
    .calendar-container {
        width: 100%;
        position: fixed;
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        border-radius: var(--radius) var(--radius) 0 0;
        max-height: 80vh;
        overflow-y: auto;
    }

    /* Categories list adjustments */
    #categories-list {
        padding: 10px;
    }

    .category-item {
        min-width: 100%;
    }

    /* Button adjustments */
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
}

/* Extra small devices (phones) */
@media (max-width: 480px) {
    body {
        font-size: 13px;
    }

    .table-container {
        margin: 0.2rem 0;
        padding: 0;
        border-radius: 0.2rem;
    }

    .table-container.card {
        padding: 0.2rem;
        box-shadow: none;
        border: 1px solid var(--border-color);
    }

    header h1 {
        font-size: 1.3rem;
        padding: 0.3rem 0.6rem;
    }

    .card {
        padding: 0.75rem;
    }

    .btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.85rem;
    }

    .category-badge {
        min-width: 70px;
        font-size: 0.75rem;
        padding: 0.15rem 0.4rem;
    }

    .expenses-table tr {
        padding: 0.2rem;
        margin-bottom: 0.3rem;
        flex-direction: column;
        border-width: 1px;
    }

    .expenses-table td {
        padding: 0.2rem;
        font-size: 0.8rem;
        min-height: 30px;
    }

    .expenses-table td::before {
        font-size: 0.8rem;
    }

    .actions {
        width: 40px;
    }

    .delete-expense-btn {
        width: 28px;
        height: 28px;
        margin: 0 auto;
        display: flex;
        align-items: center;
        justify-content: center;
        background-color: rgba(239, 68, 68, 0.1);
        font-size: 0.85rem;
    }

    .form-group {
        margin-bottom: 0.75rem;
    }

    input, select, textarea {
        padding: 0.5rem 0.75rem;
    }

    /* Footer adjustments */
    footer {
        padding: 0.75rem 0;
        margin-top: 1.5rem;
        font-size: 0.8rem;
    }
}

/* Form styles */
input, select, textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--card-bg);
    color: var(--text-color);
    font-size: 1rem;
    transition: var(--transition);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(51, 51, 51, 0.1);
}

input::placeholder, select::placeholder, textarea::placeholder {
    color: var(--text-light);
    opacity: 0.7;
}

/* Footer styles */
footer {
    text-align: center;
    padding: 1rem 0;
    margin-top: 2rem;
    color: var(--text-light);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
}

footer i {
    color: var(--primary-color);
    margin: 0 0.25rem;
}

footer i.fa-heart {
    color: #e74c3c;
    animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
    0% { transform: scale(1); }
    15% { transform: scale(1.2); }
    30% { transform: scale(1); }
    45% { transform: scale(1.2); }
    60% { transform: scale(1); }
}