:root {
    /* Light theme colors */
    --bg-primary: #f3f4fb;
    --bg-secondary: #ffffff;
    --bg-tertiary: #eef0f9;
    --text-primary: #1f2439;
    --text-secondary: #4a506a;
    --text-muted: #858cab;
    --border-color: #d7dbef;
    --border-light: #e9ecf7;
    --shadow: 0 20px 40px -32px rgba(33, 37, 79, 0.35);
    --card-bg: #ffffff;
    --input-bg: #ffffff;
    --input-border: #ccd2eb;
    --accent-primary: #7c69ff;
    --accent-secondary: #4a3dff;
    --accent-contrast: #ffffff;
    --hover-bg: rgba(124, 105, 255, 0.08);
    --success: #3ecf8e;
    --danger: #ff6b6b;
    --accent-gradient: linear-gradient(135deg, var(--accent-secondary) 0%, var(--accent-primary) 100%);
    --accent-gradient-reverse: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    --accent-glow: 0 22px 48px -24px rgba(124, 105, 255, 0.45);
}

body.dark-theme {
    /* Dark theme colors inspired by the muscle selection diagram */
    --bg-primary: #11141f;
    --bg-secondary: #161927;
    --bg-tertiary: #1c2031;
    --text-primary: #f3f5ff;
    --text-secondary: #b6bbd5;
    --text-muted: rgba(182, 187, 213, 0.65);
    --border-color: rgba(71, 78, 118, 0.55);
    --border-light: rgba(71, 78, 118, 0.35);
    --shadow: 0 28px 60px -38px rgba(8, 12, 30, 0.9);
    --card-bg: rgba(19, 22, 34, 0.92);
    --input-bg: rgba(22, 25, 39, 0.95);
    --input-border: rgba(88, 96, 140, 0.55);
    --accent-primary: #8f7cff;
    --accent-secondary: #5d4dff;
    --accent-contrast: #ffffff;
    --hover-bg: rgba(124, 105, 255, 0.16);
    --success: #2fc981;
    --danger: #ff7b84;
    --accent-gradient: linear-gradient(135deg, var(--accent-secondary) 0%, var(--accent-primary) 100%);
    --accent-gradient-reverse: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    --accent-glow: 0 30px 64px -28px rgba(88, 74, 185, 0.55);
}

html, body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
}

a, .btn-link {
    color: var(--accent-primary);
}

.btn-primary {
    color: var(--accent-contrast);
    background: var(--accent-gradient);
    border-color: transparent;
    box-shadow: var(--accent-glow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary:hover {
    transform: translateY(-1px);
    background: var(--accent-gradient-reverse);
    box-shadow: var(--accent-glow);
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem rgba(255, 255, 255, 0.35), 0 0 0 0.25rem rgba(124, 105, 255, 0.35);
}

.content {
    padding-top: 1.1rem;
}

h1:focus {
    outline: none;
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid var(--success);
}

.invalid {
    outline: 1px solid var(--danger);
}

.validation-message {
    color: var(--danger);
}

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

.darker-border-checkbox.form-check-input {
    border-color: var(--border-color);
}

/* Dark mode Bootstrap overrides */
body.dark-theme .card {
    background: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
}

body.dark-theme .card-body {
    background: var(--card-bg);
}

body.dark-theme .table {
    color: var(--text-primary);
    background: var(--card-bg);
}

body.dark-theme .table thead th {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--border-color);
}

body.dark-theme .table tbody tr {
    border-color: var(--border-color);
}

body.dark-theme .table-hover tbody tr:hover {
    background: var(--bg-tertiary);
}

body.dark-theme .form-control,
body.dark-theme .form-select {
    background: var(--input-bg);
    border-color: var(--input-border);
    color: var(--text-primary);
}

body.dark-theme .form-control:focus,
body.dark-theme .form-select:focus {
    background: var(--input-bg);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

body.dark-theme .form-label {
    color: var(--text-primary);
}

body.dark-theme .breadcrumb {
    background: var(--bg-secondary);
}

body.dark-theme .breadcrumb-item,
body.dark-theme .breadcrumb-item a {
    color: var(--text-secondary);
}

body.dark-theme .breadcrumb-item.active {
    color: var(--text-primary);
}

body.dark-theme .text-muted {
    color: var(--text-muted) !important;
}

body.dark-theme .bg-light {
    background: var(--bg-tertiary) !important;
}

body.dark-theme .border {
    border-color: var(--border-color) !important;
}