:root {
    --primary-color: #007bff;
    --primary-hover-color: #0056b3;
    --secondary-color: #6c757d;
    --danger-color: #dc3545;
    --bg-color: #f8f9fa;
    --card-bg: white;
    --text-color: #333;
    --muted-text: #6c757d;
    --border-color: #dee2e6;
    --input-bg: white;
    --input-border: #ced4da;
    --header-bg: #007bff;
    --header-text: white;
    --table-header-bg: #e9ecef;
    --alert-danger-bg: #f8d7da;
    --alert-danger-text: #721c24;
    --alert-danger-border: #f5c6cb;
    --alert-success-bg: #d4edda;
    --alert-success-text: #155724;
    --alert-success-border: #c3e6cb;
    --alert-info-bg: #d1ecf1;
    --alert-info-text: #0c5460;
    --alert-info-border: #bee5eb;
    --success-color: #28a745;
    --link-color: #007bff;
    --link-hover-color: #0056b3;
}

[data-theme="dark"] {
    --primary-color: #375a7f;
    --primary-hover-color: #2b4764;
    --secondary-color: #444;
    --danger-color: #e74c3c;
    --bg-color: #222;
    --card-bg: #333;
    --text-color: #ebebeb;
    --muted-text: #888;
    --border-color: #444;
    --input-bg: #333;
    --input-border: #444;
    --header-bg: #1a1a1a;
    --header-text: #ebebeb;
    --table-header-bg: #444;
    --alert-danger-bg: #442726;
    --alert-danger-text: #ea868f;
    --alert-danger-border: #842029;
    --alert-success-bg: #1e4627;
    --alert-success-text: #d4edda;
    --alert-success-border: #28a745;
    --alert-info-bg: #0c5460;
    --alert-info-text: #d1ecf1;
    --alert-info-border: #17a2b8;
    --success-color: #27ae60;
    --link-color: #80bdff;
    --link-hover-color: #a6d5ff;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --primary-color: #375a7f;
        --primary-hover-color: #2b4764;
        --secondary-color: #444;
        --danger-color: #e74c3c;
        --bg-color: #222;
        --card-bg: #333;
        --text-color: #ebebeb;
        --muted-text: #888;
        --border-color: #444;
        --input-bg: #333;
        --input-border: #444;
        --header-bg: #1a1a1a;
        --header-text: #ebebeb;
        --table-header-bg: #444;
        --alert-danger-bg: #442726;
        --alert-danger-text: #ea868f;
        --alert-danger-border: #842029;
        --alert-success-bg: #1e4627;
        --alert-success-text: #d4edda;
        --alert-success-border: #28a745;
        --alert-info-bg: #0c5460;
        --alert-info-text: #d1ecf1;
        --alert-info-border: #17a2b8;
        --success-color: #27ae60;
        --link-color: #80bdff;
        --link-hover-color: #a6d5ff;
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.5;
    margin: 0;
    color: var(--text-color);
    background-color: var(--bg-color);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

a {
    color: var(--link-color);
    text-decoration: none;
}

a:hover {
    color: var(--link-hover-color);
    text-decoration: underline;
}

.container {
    padding-left: 15px;
    padding-right: 15px;
    margin: 0 auto;
    max-width: 100%;
    width: 100%;
    box-sizing: border-box;
}

.container-full {
    padding-left: 20px;
    padding-right: 20px;
    margin: 0 auto;
    max-width: 100%;
    width: 100%;
    box-sizing: border-box;
}

header {
    background-color: var(--header-bg);
    color: var(--header-text);
    padding: 10px 0;
    position: relative;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-right {
    display: flex;
    align-items: center;
}

.brand {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--header-text);
    text-decoration: none;
}

.brand:hover {
    color: var(--header-text);
    text-decoration: none;
}

.menu-toggle {
    background: none;
    border: 1px solid var(--header-text);
    color: var(--header-text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 2px 8px;
    border-radius: 4px;
    margin-left: 10px;
}

.nav-links {
    display: none;
    list-style: none;
    padding: 0;
    margin: 0;
    position: absolute;
    top: 50px;
    left: 0;
    width: 100%;
    background-color: var(--header-bg);
    flex-direction: column;
    z-index: 1000;
}

.nav-links.active {
    display: flex;
}

.nav-links li a,
.nav-links li .nav-link {
    color: var(--header-text);
    text-decoration: none;
    padding: 10px 20px;
    display: block;
    background: none;
    border: none;
    font: inherit;
    cursor: pointer;
    width: 100%;
    text-align: left;
}

.nav-links li a:hover,
.nav-links li .nav-link:hover {
    background-color: var(--primary-hover-color);
    color: var(--header-text);
    text-decoration: none;
}

.dropdown-menu {
    display: none;
    list-style: none;
    padding: 0;
    margin: 0;
    background-color: var(--header-bg);
}

.nav-dropdown.active > .dropdown-menu {
    display: block;
}

.dropdown-toggle::after {
    content: " ▼";
    font-size: 0.6em;
    vertical-align: middle;
}

.nav-dropdown .dropdown-menu li a {
    padding-left: 40px;
}

main {
    padding-top: 20px;
    padding-bottom: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

footer {
    text-align: center;
    padding: 20px 0;
    font-size: 0.875rem;
    color: var(--muted-text);
}

/* Forms */
.form-group {
    margin-bottom: 15px;
}

.row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
    margin-bottom: 15px;
}

.flex-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

@media (min-width: 768px) {
    .row-cols-2 {
        grid-template-columns: 1fr 1fr;
    }
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.required-label::after {
    content: " *";
    color: var(--danger-color);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="time"],
input[type="datetime-local"],
select,
textarea {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    box-sizing: border-box;
    background-color: var(--input-bg);
    color: var(--text-color);
    font-family: inherit;
    font-size: 1rem;
    line-height: 1.5;
    vertical-align: middle;
}

.btn {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 4px;
    text-decoration: none;
    cursor: pointer;
    font-size: 1rem;
    font-family: inherit;
    line-height: 1.5;
    border: 1px solid transparent;
    text-align: center;
    vertical-align: middle;
    box-sizing: border-box;
}

.btn:hover {
    text-decoration: none;
    color: white;
}

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

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

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

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

.btn-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

@media (max-width: 767px) {
    .btn-group {
        flex-direction: column;
        width: 100%;
    }
    .btn-group .btn,
    .btn-group form,
    .btn-group form .btn {
        width: 100%;
    }
}

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

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

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--table-header-bg);
}

/* Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 15px;
    margin-bottom: 20px;
}

.card-title {
    margin-top: 0;
    font-size: 1.25rem;
}

.card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.text-center {
    text-align: center;
}

.header-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

.header-actions h1, .header-actions h2 {
    margin-bottom: 5px;
}

.header-actions-vertical h1, .header-actions-vertical h2 {
    flex: 0 0 100%;
}

.centered-form-container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex: 1;
    width: 100%;
}

.auth-card {
    width: 90%;
    max-width: 500px;
}

.alert {
    padding: 12px 20px;
    border-radius: 4px;
    margin-bottom: 20px;
    border: 1px solid transparent;
    border-left-width: 5px;
    font-weight: 500;
}

.alert-danger {
    background-color: var(--alert-danger-bg);
    color: var(--alert-danger-text);
    border-color: var(--alert-danger-border);
    border-left-color: var(--danger-color);
}

.alert-success {
    background-color: var(--alert-success-bg);
    color: var(--alert-success-text);
    border-color: var(--alert-success-border);
    border-left-color: var(--success-color);
}

.alert-info {
    background-color: var(--alert-info-bg);
    color: var(--alert-info-text);
    border-color: var(--alert-info-border);
    border-left-color: var(--link-color);
}

.btn-sm {
    padding: 4px 8px;
    font-size: 0.8rem;
}

.btn-block {
    display: block;
    width: 100%;
}

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

hr {
    border: 0;
    border-top: 1px solid var(--border-color);
    margin: 15px 0;
}

.theme-switch {
    background: none;
    border: none;
    color: var(--header-text);
    cursor: pointer;
    font-size: 1.25rem;
    padding: 5px;
    margin-left: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-switch .sun-icon {
    display: none;
}

.theme-switch .moon-icon {
    display: block;
}

[data-theme="dark"] .theme-switch .sun-icon {
    display: block;
}

[data-theme="dark"] .theme-switch .moon-icon {
    display: none;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-switch .sun-icon {
        display: block;
    }
    :root:not([data-theme="light"]) .theme-switch .moon-icon {
        display: none;
    }
}

@media (min-width: 768px) {
    .card-grid {
        grid-template-columns: 1fr 1fr;
    }
    .container {
        max-width: 720px;
    }
    .menu-toggle {
        display: none;
    }
    .nav-links {
        display: flex;
        position: static;
        flex-direction: row;
        width: auto;
        background: none;
    }
    .nav-links li a,
    .nav-links li .nav-link {
        padding: 5px 15px;
        width: auto;
    }

    .nav-dropdown {
        position: relative;
    }

    .nav-dropdown:hover > .dropdown-menu {
        display: block;
        position: absolute;
        top: 100%;
        left: 0;
        min-width: 160px;
        box-shadow: 0 8px 16px rgba(0,0,0,0.2);
        z-index: 1001;
    }

    .nav-dropdown .dropdown-menu li a {
        padding: 10px 20px;
    }

    .nav-dropdown.active > .dropdown-menu {
        display: none;
    }

    .nav-dropdown.active:hover > .dropdown-menu {
        display: block;
    }
}

@media (min-width: 992px) {
    .container {
        max-width: 960px;
    }
}

@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
}

@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
}

/* Notification Permission Dialog */
.notification-dialog-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.notification-dialog {
    background: var(--card-bg);
    color: var(--text-color);
    padding: 20px;
    border-radius: 8px;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    text-align: center;
}

.notification-dialog h3 {
    margin-top: 0;
}

.notification-dialog p {
    margin-bottom: 20px;
    color: var(--muted-text);
}

.notification-dialog-buttons {
    display: flex;
    justify-content: space-around;
    gap: 10px;
}

.notification-dialog-buttons button {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    flex: 1;
}

.btn-allow {
    background-color: var(--success-color);
    color: white;
}

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

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

/* Form elements in dialogs */
.notification-dialog form {
    text-align: left;
    margin-top: 15px;
}

.notification-dialog .form-group {
    margin-bottom: 15px;
}

.notification-dialog label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.notification-dialog input, 
.notification-dialog textarea {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--input-bg);
    color: var(--text-color);
    box-sizing: border-box;
}

.notification-dialog textarea {
    resize: vertical;
    min-height: 60px;
}

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

/* Native Dialog Replacement */
.native-dialog {
    border: none;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    padding: 0;
    max-width: 450px;
    width: 90%;
    background-color: var(--card-bg);
    color: var(--text-color);
}

.native-dialog::backdrop {
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

.dialog-content {
    padding: 24px;
}

.dialog-content h3 {
    margin-top: 0;
    margin-bottom: 12px;
    color: var(--primary-color);
}

.dialog-content p {
    margin-bottom: 24px;
    line-height: 1.6;
}

.dialog-buttons {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}