:root {
    color-scheme: dark;
    --body-bg: #0a0e16;
    --surface-bg: #131a26;
    --surface-bg-rgb: 19, 26, 38;
    --surface-bg-alt: #0e1420;
    --surface-border: rgba(255, 255, 255, 0.08);
    --body-color: #f2f5fa;
    --text-muted: #8a93a6;
    --primary-solid: #22d3ee;
    --primary-solid-rgb: 34, 211, 238;
    --primary-color: #0c4a6e;
    --accent-gradient: linear-gradient(90deg, #0284c7 0%, #22d3ee 100%);
    --accent-contrast: #04121c;
    --gold-solid: #f5b91a;
    --gold-solid-rgb: 245, 185, 26;
    --gold-gradient: linear-gradient(90deg, #d98a06 0%, #f5b91a 55%, #fde68a 100%);
    --gold-contrast: #3d2708;
    --page-gradient: radial-gradient(circle at 50% 0%, var(--primary-color) 0%, var(--body-bg) 60%);
    --calendar-icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='4' width='18' height='18' rx='2'/%3E%3Cpath d='M16 2v4M8 2v4M3 10h18'/%3E%3C/svg%3E");
    --spinner-icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 8l4-4 4 4M4 16l4 4 4-4'/%3E%3C/svg%3E");
    --resizer-icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%2322d3ee' stroke-width='1.5' stroke-linecap='round'%3E%3Cpath d='M14 6L6 14M14 11l-3 3'/%3E%3C/svg%3E");
    --select-arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='none' stroke='%2322d3ee' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3E%3C/svg%3E");
    --bs-primary: var(--primary-solid);
    --bs-primary-rgb: var(--primary-solid-rgb);
}

[data-bs-theme="light"] {
    color-scheme: light;
    --body-bg: #eef3f9;
    --surface-bg: #ffffff;
    --surface-bg-rgb: 255, 255, 255;
    --surface-bg-alt: #f1f5fa;
    --surface-border: rgba(15, 23, 42, 0.08);
    --body-color: #101826;
    --text-muted: #5b6472;
    --primary-solid: #0284c7;
    --primary-solid-rgb: 2, 132, 199;
    --primary-color: #38bdf8;
    --accent-gradient: linear-gradient(90deg, #0369a1 0%, #38bdf8 100%);
    --accent-contrast: #ffffff;
    --gold-solid: #b8770a;
    --gold-solid-rgb: 184, 119, 10;
    --select-arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='none' stroke='%230284c7' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3E%3C/svg%3E");
    --resizer-icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%230284c7' stroke-width='1.5' stroke-linecap='round'%3E%3Cpath d='M14 6L6 14M14 11l-3 3'/%3E%3C/svg%3E");
    --bs-primary: var(--primary-solid);
    --bs-primary-rgb: var(--primary-solid-rgb);
}

html, body {
    min-height: 100%;
    color: var(--body-color);
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

html {
    scrollbar-gutter: auto;
    background-color: var(--body-bg);
    background-image: var(--page-gradient);
    background-repeat: no-repeat;
    background-attachment: fixed;
}

body {
    background: transparent;
}

h1:focus {
    outline: none;
}

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

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus {
    box-shadow: 0 0 0 0.1rem var(--surface-bg), 0 0 0 0.25rem var(--primary-solid);
}

.form-check-input:focus {
    box-shadow: 0 0 0 0.1rem var(--surface-bg), 0 0 0 0.25rem var(--gold-solid);
}

.form-control:focus {
    box-shadow: 0 0 0 0.1rem var(--surface-bg), 0 0 0 0.14rem var(--gold-solid);
}

.form-control:focus, .form-check-input:focus {
    border-color: var(--gold-solid);
}

.form-check-input:checked {
    background-color: var(--primary-solid);
    border-color: var(--primary-solid);
}

#themeSwitch:focus {
    box-shadow: none;
}

#themeSwitch:focus:not(:checked) {
    border-color: rgba(0, 0, 0, .25);
}

.progress-bar {
    background-color: var(--primary-solid);
}

.btn-primary,
.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active,
.btn-check:checked + .btn-primary,
.btn-primary.active,
.show > .btn-primary.dropdown-toggle,
.btn-primary:disabled,
.btn-primary.disabled {
    color: var(--accent-contrast);
    background: var(--accent-gradient);
    background-clip: padding-box;
    border: 1px solid transparent;
    box-shadow: none;
}

.btn-primary:hover:not(:disabled) {
    filter: brightness(1.08);
}

.btn-primary:focus,
.btn-primary:active:focus {
    box-shadow: 0 0 0 0.2rem rgba(var(--primary-solid-rgb), 0.35);
}

.btn-outline-primary,
.btn-outline-primary:focus,
.btn-outline-primary:active,
.btn-check:checked + .btn-outline-primary,
.btn-outline-primary.active {
    color: var(--primary-solid);
    border-color: var(--primary-solid);
    background: transparent;
}

.btn-outline-primary:hover:not(:disabled) {
    color: var(--accent-contrast);
    background: var(--accent-gradient);
    background-clip: padding-box;
    border: 1px solid transparent;
}

.btn-outline-primary:focus,
.btn-outline-primary:active:focus {
    box-shadow: 0 0 0 0.2rem rgba(var(--primary-solid-rgb), 0.35);
}

.border-primary {
    border-color: var(--primary-solid) !important;
}

.link-primary {
    color: var(--primary-solid);
}

.card {
    background-color: var(--surface-bg);
    color: var(--body-color);
    border-color: var(--surface-border);
}

.dropdown-menu {
    background-color: var(--surface-bg);
    color: var(--body-color);
    border: 1px solid var(--primary-solid);
    border-radius: 1.25rem;
    box-shadow: 0 0 0 1px rgba(var(--primary-solid-rgb), 0.15), 0 18px 40px rgba(0, 0, 0, 0.35);
    padding: 0.5rem;
    overflow: hidden;
}

.dropdown-item {
    color: var(--body-color);
}

.dropdown-item:hover, .dropdown-item:focus {
    background-color: var(--surface-bg-alt);
    color: var(--body-color);
}

.dropdown-divider {
    border-color: var(--surface-border);
}

.progress {
    background-color: var(--surface-bg-alt);
}

.progress-bar {
    background: var(--accent-gradient);
}

.form-control, .form-select {
    background-color: var(--surface-bg-alt);
    color: var(--body-color);
    border-color: var(--surface-border);
}

.form-control:focus, .form-select:focus {
    background-color: var(--surface-bg-alt);
    color: var(--body-color);
    border-color: var(--gold-solid);
}

.form-control::-webkit-calendar-picker-indicator {
    width: 1rem;
    height: 1rem;
    padding: 0;
    margin-left: 0.25rem;
    background-color: var(--primary-solid);
    background-image: none;
    opacity: 1;
    cursor: pointer;
    -webkit-mask: var(--calendar-icon) center / contain no-repeat;
    mask: var(--calendar-icon) center / contain no-repeat;
}

.form-select {
    background-image: var(--select-arrow);
}

textarea.form-control::-webkit-resizer {
    background: var(--resizer-icon) center / contain no-repeat;
}

.form-control::-webkit-inner-spin-button {
    -webkit-appearance: none;
    appearance: none;
    width: 1rem;
    height: 1.5rem;
    margin-left: 0.25rem;
    background-color: var(--primary-solid);
    opacity: 1;
    cursor: pointer;
    -webkit-mask: var(--spinner-icon) center / contain no-repeat;
    mask: var(--spinner-icon) center / contain no-repeat;
}

.input-group-text {
    background-color: var(--surface-bg-alt);
    color: var(--text-muted);
    border-color: var(--surface-border);
}

.input-group:focus-within .input-group-text {
    border-color: var(--gold-solid);
    color: var(--gold-solid);
}

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

.border, .border-top, .border-bottom, .border-start, .border-end {
    border-color: var(--surface-border) !important;
}

.validation-message {
    color: red;
}

#blazor-error-ui {
    color-scheme: light only;
    background: lightyellow;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    box-sizing: border-box;
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

    #blazor-error-ui .dismiss {
        cursor: pointer;
        position: absolute;
        right: 0.75rem;
        top: 0.5rem;
    }

.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."
    }

.app-loader {
    position: fixed;
    inset: 0;
    z-index: 1100;
    background-color: var(--body-bg);
    background-image: var(--page-gradient);
    background-repeat: no-repeat;
}

.app-loader-ring {
    position: absolute;
    top: 20vh;
    left: 0;
    right: 0;
    width: 8rem;
    height: 8rem;
    margin: 0 auto;
    animation: app-loader-spin 1.1s linear infinite;
}

.app-loader-ring circle {
    fill: none;
    stroke-width: 7.5;
}

.app-loader-track {
    stroke: var(--surface-border);
}

.app-loader-arc {
    stroke: var(--primary-solid);
    stroke-linecap: round;
    stroke-dasharray: 63 251;
}

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

code {
    color: #c02d76;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}

.challenge-surface {
    border: 1px solid var(--surface-border);
    border-radius: 0.9rem;
    background: var(--surface-bg);
    box-shadow: 0 0.35rem 1rem rgba(0, 0, 0, 0.22);
}

.challenge-master-detail {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.challenge-master-detail-list,
.challenge-master-detail-detail {
    min-width: 0;
}

@media (min-width: 992px) {
    .challenge-master-detail {
        flex-direction: row;
        align-items: flex-start;
    }

    .challenge-master-detail-list {
        flex: 0 0 38%;
    }

    .challenge-master-detail-detail {
        flex: 1 1 auto;
    }
}

/*
 * Shared "tile" shell for a challenge step, used both by the read-only step tree (ChallengeStepTile) and the
 * multi-step create-form editor (ChallengeNodeEditor), so building a tree and reading one look like the same
 * building block.
 */
.step-tile {
    border: 1px solid var(--primary-solid);
    border-radius: 1rem;
    margin-bottom: 0.75rem;
    overflow: hidden;
    background-color: var(--surface-bg-alt);
}

/* Opt-in modifier (not part of the shared .step-tile shell) for the read-only marker list's magnet scrolling. */
.scroll-snap-item {
    scroll-snap-align: start;
    scroll-margin-top: calc(2.75rem + env(safe-area-inset-top, 0px) + 8rem);
}

.scroll-snap-container {
    scroll-snap-type: y proximity;
}

.step-tile-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 0.9rem;
}

.step-tile-title {
    font-weight: 600;
}

.step-tile-body {
    padding: 0 0.9rem 0.9rem;
}

.step-tile-child {
    margin-left: 1rem;
    padding-left: 0.75rem;
    border-left: 2px solid rgba(var(--primary-solid-rgb), 0.25);
}

.step-tile-map {
    display: block;
    width: 100%;
    border: 0;
    padding: 0;
    text-align: left;
    color: inherit;
    cursor: pointer;
}

.step-tile-status-icon {
    font-size: 1rem;
}

.step-tile-open {
    border-color: var(--gold-solid);
    background: rgba(var(--gold-solid-rgb), 0.08);
}

.step-tile-open .step-tile-status-icon {
    color: var(--gold-solid);
}

.step-tile-completed {
    border-color: var(--primary-solid);
    background: rgba(var(--primary-solid-rgb), 0.1);
}

.step-tile-completed .step-tile-status-icon {
    color: var(--primary-solid);
}

.step-tile-locked {
    border-color: transparent;
    background: var(--surface-bg-alt);
    opacity: 0.6;
}

.step-tile-locked .step-tile-status-icon,
.step-tile-locked .step-tile-title {
    color: var(--text-muted);
}

.step-tile-focused {
    box-shadow: 0 0 0 2px var(--gold-solid);
}