:root {
    /* Gruvbox Dark Palette */
    --bg-main: #282828;         /* bg0 */
    --bg-card: #3c3836;         /* bg1 */
    --bg-card-hover: #504945;   /* bg2 */
    --border: #504945;          /* bg2 */
    --border-hover: #665c54;    /* bg3 */
    --border-focus: #fabd2f;    /* Gruvbox Yellow */

    --text-main: #ebdbb2;       /* fg1 */
    --text-heading: #fbf1c7;    /* fg0 */
    --text-muted: #a89984;      /* fg4 */

    --primary: #fabd2f;         /* Gruvbox Yellow */
    --primary-hover: #d79921;   /* Gruvbox Dark Yellow */
    --primary-text: #282828;    /* Dark contrast text for yellow buttons */

    --income: #b8bb26;          /* Gruvbox Green */
    --expense: #fb4934;         /* Gruvbox Red */
    --danger: #fb4934;          /* Gruvbox Red */
    --accent-blue: #83a598;     /* Gruvbox Blue */

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

* {
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    max-width: 920px;
    margin: 0 auto;
    padding: 24px 20px 60px 20px;
    color: var(--text-main);
    background-color: var(--bg-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Headings & Links */
h1, h2, h3, h4 {
    margin-top: 0;
    color: var(--text-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.15s ease;
}

a:hover {
    color: var(--primary-hover);
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 32px;
}

.navbar-brand {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 0.05em;
    text-decoration: none;
    color: var(--primary);
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Header Section & Balance Card */
.header-section {
    margin-bottom: 32px;
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.header-section h1 {
    margin: 0 0 8px 0;
    font-size: 28px;
}

.balance-text {
    margin: 0;
    font-size: 15px;
    color: var(--text-muted);
}

.balance-text strong {
    font-size: 24px;
    color: var(--primary);
    font-weight: 700;
    margin-left: 6px;
}

/* Cards & Auth Containers */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 24px;
    border-radius: var(--radius-md);
    margin-bottom: 32px;
    box-shadow: var(--shadow);
}

.auth-container {
    max-width: 420px;
    margin: 60px auto;
}

.auth-container h2 {
    text-align: center;
    margin-bottom: 24px;
}

.auth-container p {
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
}

/* Tables */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 10px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

th {
    background: var(--bg-card-hover);
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    text-align: left;
}

td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
    color: var(--text-main);
}

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

tr:hover td {
    background-color: var(--bg-card-hover);
}

.income {
    color: var(--income);
    font-weight: 600;
}

.expense {
    color: var(--expense);
    font-weight: 500;
}

/* Filter Pills */
.filters {
    margin-bottom: 32px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.filters a {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.15s ease;
}

.filters a:hover {
    border-color: var(--border-hover);
    color: var(--text-main);
}

.filters a.active {
    background: var(--primary);
    color: var(--primary-text);
    border-color: var(--primary);
    font-weight: 600;
    box-shadow: 0 0 12px rgba(250, 189, 47, 0.25);
}

/* Chart Container */
.chart-container {
    position: relative;
    height: 400px;
    width: 100%;
    margin-top: 24px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}

/* Buttons */
button, .btn {
    background: var(--primary);
    color: var(--primary-text);
    padding: 9px 18px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    font-size: 14px;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

button:hover, .btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-stats, .btn-nav {
    background: var(--bg-card-hover);
    color: var(--text-main);
    border: 1px solid var(--border-hover);
    font-weight: 600;
}

.btn-stats:hover, .btn-nav:hover {
    background: var(--border-hover);
    color: var(--text-heading);
}

.btn-logout, .btn-delete {
    background: rgba(251, 73, 52, 0.15);
    color: var(--danger);
    border: 1px solid rgba(251, 73, 52, 0.3);
    font-weight: 600;
}

.btn-logout:hover, .btn-delete:hover {
    background: var(--danger);
    color: var(--bg-main);
}

.btn-edit {
    background: rgba(131, 165, 152, 0.15);
    color: var(--accent-blue);
    border: 1px solid rgba(131, 165, 152, 0.3);
    text-decoration: none;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    margin-right: 6px;
    transition: all 0.15s ease;
}

.btn-edit:hover {
    background: var(--accent-blue);
    color: var(--bg-main);
}

.cancel {
    background: var(--bg-card-hover);
    color: var(--text-muted);
    text-decoration: none;
    padding: 9px 18px;
    border-radius: var(--radius-sm);
    display: inline-block;
    margin-left: 10px;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid var(--border-hover);
    transition: all 0.15s ease;
}

.cancel:hover {
    background: var(--border-hover);
    color: var(--text-main);
}

/* Django Form Styling */
form p {
    margin-bottom: 18px;
}

form label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

form input[type="text"],
form input[type="password"],
form input[type="email"],
form input[type="number"],
form input[type="date"],
form select {
    width: 100%;
    box-sizing: border-box;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background-color: var(--bg-main);
    color: var(--text-main);
    transition: all 0.15s ease;
}

form input:focus,
form select:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(250, 189, 47, 0.2);
}

/* Django Form Password Requirements & Help Text */
.helptext, form span.helptext {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 6px;
    line-height: 1.5;
}

.helptext ul {
    margin: 6px 0 10px 0;
    padding-left: 18px;
    color: var(--text-muted);
    font-size: 12px;
}

.helptext li {
    margin-bottom: 4px;
}

/* Validation Errors */
.errorlist {
    color: var(--expense);
    font-size: 13px;
    list-style: none;
    padding: 10px 14px;
    margin: 6px 0 16px 0;
    background: rgba(251, 73, 52, 0.1);
    border: 1px solid rgba(251, 73, 52, 0.25);
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.errorlist li {
    margin: 2px 0;
}