/* Form Elements */
form {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-sm);
    min-height: 100vh;
    height: auto;
    box-sizing: border-box;
    justify-content: flex-start;
    width: 100%;
    position: relative;
}

/* Mobile viewport height handling - use dynamic viewport units when available */
@supports (height: 100dvh) {
    form {
        min-height: 100dvh;
    }
}

input {
    padding: var(--spacing-md) var(--spacing-lg);
    margin: var(--spacing-sm);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-size: var(--font-size-md);
    font-family: inherit;
    box-sizing: border-box;
    transition: all var(--transition-fast);
}

input[type=number] {
    width: 100%;
    max-width: var(--max-width-input);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

input[type=number]:focus-visible {
    border-color: var(--focus-outline-color);
}

input[type=submit],
input[type=button] {
    padding: var(--spacing-md) var(--spacing-lg);
    margin: 0;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-xl);
    box-sizing: border-box;
    font-family: inherit;
    width: auto;
    min-width: 32px;
    height: auto;
    min-height: 32px;
    font-weight: 400;
    line-height: 1;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    -webkit-tap-highlight-color: transparent;
    flex-shrink: 0;
}

input[type=submit] {
    background-color: var(--color-primary);
    color: white;
}

input[type=button] {
    background-color: var(--color-gray-400);
    color: white;
}

input[type=submit]:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(33, 150, 243, 0.3);
}

input[type=submit]:focus-visible,
input[type=button]:focus-visible,
button:focus-visible,
select:focus-visible,
input[type=number]:focus-visible {
    outline: var(--focus-outline-width) solid var(--focus-outline-color);
    outline-offset: var(--focus-outline-offset);
    border-radius: var(--radius-md);
}

input[type=submit]:disabled {
    background-color: var(--color-gray-500);
    color: var(--color-text-muted);
    cursor: not-allowed;
    opacity: 0.6;
}

input[type=button]:hover {
    background-color: var(--color-gray-500);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

input[type=button]:focus-visible {
    outline: var(--focus-outline-width) solid var(--focus-outline-color);
    outline-offset: var(--focus-outline-offset);
}

select {
    width: 100%;
    max-width: var(--max-width-input);
    padding: var(--spacing-md) var(--spacing-lg);
    margin: var(--spacing-sm);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-size: var(--font-size-md);
    font-family: inherit;
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    box-sizing: border-box;
    cursor: pointer;
    transition: all var(--transition-fast);
}

select:hover {
    border-color: var(--color-gray-300);
}

select:focus-visible {
    outline: var(--focus-outline-width) solid var(--focus-outline-color);
    outline-offset: var(--focus-outline-offset);
    border-color: var(--focus-outline-color);
}

/* Fieldset */
fieldset {
    border-color: rgba(255, 255, 255, 0.15);
    border-width: 2px;
    border-style: solid;
    border-radius: var(--radius-lg);
    margin: var(--spacing-sm) auto;
    opacity: 0.7;
    width: 100%;
    max-width: var(--max-width-fieldset);
    padding: var(--spacing-lg) var(--spacing-xl);
    box-sizing: border-box;
    transition: opacity var(--transition-fast);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
}

fieldset legend {
    font-size: var(--font-size-md);
    padding: 0 var(--spacing-xl);
    font-weight: 400;
    letter-spacing: 0.2px;
    text-align: left;
}

/* Typography */
h1 {
    margin: var(--spacing-sm) 0 var(--spacing-md) 0;
    font-size: var(--font-size-3xl);
    font-weight: 500;
    letter-spacing: -0.3px;
}

/* Status Colors */
.success {
    color: var(--color-success);
}

.fail {
    color: var(--color-error);
}

.skip {
    color: #c5c5c5; /* WCAG AA compliant: 4.8:1 contrast ratio on dark background (#2e2e2e) */
}

/* Layout Utilities */
.flex-container {
    display: flex;
    justify-content: center;
    align-items: center;
}

.flex-direction-row {
    flex-direction: row;
}

.flex-direction-column {
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
    align-items: center;
}

.flex-direction-column > div {
    width: 100%;
    max-width: var(--max-width-fieldset);
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin: 0 auto;
    box-sizing: border-box;
}

/* Special handling for game-mode-fields to ensure proper stacking */
.flex-direction-column > .game-mode-fields {
    display: block;
}

.flex-direction-column > .game-mode-fields > div {
    display: flex;
    justify-content: center;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

/* Game mode fields should not be flex containers themselves */
.game-mode-fields {
    display: block;
    width: 100%;
}

.game-mode-fields > div {
    width: 100%;
    display: flex;
    justify-content: center;
}

/* Ensure nested fieldsets in game-mode-fields stack vertically */
.game-mode-fields > fieldset,
.game-mode-fields > div > fieldset {
    width: 100%;
    max-width: var(--max-width-fieldset);
    display: block;
    box-sizing: border-box;
}

.game-mode-fields.hidden {
    display: none !important;
}

/* Count Container */
.count-container {
    display: flex;
    margin: var(--spacing-sm) 0 var(--spacing-md) 0;
    font-size: var(--font-size-base);
    gap: var(--spacing-xl);
    font-weight: 400;
}

.count-container.hidden {
    display: none !important;
}

/* Operation Buttons */
.operation-selector {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.operation-btn {
    width: 40px !important;
    height: 40px !important;
    min-width: 40px !important;
    min-height: 40px !important;
    padding: 0 !important;
    margin: 0;
    background-color: var(--color-gray-400);
    color: white;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-size: var(--font-size-2xl);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
    flex-shrink: 0;
}

.operation-btn:hover {
    background-color: var(--color-gray-500);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.operation-btn.active {
    background-color: var(--color-primary);
    padding: 0 !important;
    width: 40px !important;
    height: 40px !important;
    min-width: 40px !important;
    min-height: 40px !important;
}

.operation-btn.active:hover {
    background-color: var(--color-primary-hover);
}

.operation-btn:focus-visible {
    outline: var(--focus-outline-width) solid var(--focus-outline-color);
    outline-offset: var(--focus-outline-offset);
}

/* Mode Toggle Buttons */
.mode-toggle-container {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    align-items: center;
}

/* Separator - Generic design element for reuse */
.separator {
    color: var(--color-text-quaternary);
    margin: 0 var(--spacing-sm);
    font-size: var(--font-size-xl);
}

.mode-button {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-weight: bold;
    background-color: var(--color-primary);
    color: white;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
    font-size: var(--font-size-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

.mode-button.active {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-lg) var(--spacing-2xl);
}

.mode-button.inactive {
    font-weight: normal;
    background-color: var(--color-gray-100);
    color: #2a2a2a; /* WCAG AA compliant: 7.5:1 contrast ratio on light background (#e0e0e0) */
    padding: var(--spacing-lg) var(--spacing-2xl);
}

.mode-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.mode-button:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.mode-button:focus-visible {
    outline: var(--focus-outline-width) solid var(--focus-outline-color);
    outline-offset: var(--focus-outline-offset);
}

/* Sample Mode Styles */
#sampleModeFields.hidden {
    display: none !important;
}

#sampleModeFields.visible {
    display: block !important;
}

#sampleModeFields button {
    background-color: var(--color-gray-400);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 400;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
}

#sampleModeFields button:hover {
    background-color: var(--color-gray-500);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

#sampleModeFields button:active {
    transform: translateY(0);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.sample-controls-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    /* Prevent layout shifts when visual elements are created */
    min-height: 400px;
    position: relative;
}

.sample-element-label {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}

.sample-element-label-text {
    font-size: 0.9em;
    color: var(--color-text-secondary);
}

.sample-element-select {
    width: auto;
    min-width: 80px;
    padding: var(--spacing-md) var(--spacing-lg);
    margin: 0 auto;
    border: 2px solid var(--color-gray-400);
    border-radius: var(--radius-md);
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
    font-size: var(--font-size-md);
    font-family: inherit;
    cursor: pointer;
    text-align: center;
}

.sample-element-hint {
    font-size: 0.85em;
    color: var(--color-text-tertiary);
    font-style: italic;
    margin-top: -2px;
    text-align: center;
}

.sample-lifecycle-hint {
    font-size: 0.8em;
    color: var(--color-text-quaternary);
    font-style: italic;
    text-align: center;
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    padding: var(--spacing-xs) 0;
    border-top: 1px solid var(--color-gray-500);
    border-bottom: 1px solid var(--color-gray-500);
}

.sample-button {
    padding: var(--spacing-lg);
    font-weight: bold;
    width: 100%;
    max-width: var(--max-width-input);
    box-sizing: border-box;
}

.sample-button-reset {
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    background-color: var(--color-gray-400);
    width: 100%;
    max-width: var(--max-width-input);
    box-sizing: border-box;
}

.sample-button-secondary {
    padding: var(--spacing-lg);
    width: 100%;
    max-width: var(--max-width-input);
    box-sizing: border-box;
}

/* Button Container */
.button-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
}

/* Max Number button container - centered below input */
fieldset .button-container {
    margin-top: var(--spacing-xs);
}

/* Answer Message */
#answerMessage {
    min-height: calc(var(--spacing-xl) + var(--spacing-xl));
    font-size: var(--font-size-base);
    margin-top: var(--spacing-xs);
    line-height: 1.5;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Visual Hint */
#visualHint {
    min-height: 60px;
}

#visualHint .hint-content {
    min-height: 40px;
}

/* Ensure visual theme elements don't cause layout shifts */
.jellyfish-bell,
.jellyfish-tentacle,
.firefly-glow,
.firefly-trail,
.pearl,
.mushroom-cap,
.mushroom-stem,
.mushroom-spot,
.maple-leaf {
    pointer-events: none;
    position: absolute;
    z-index: 1000;
    /* No containment - allow SVG to render freely */
}

.maple-mote {
    pointer-events: none;
    position: absolute;
    z-index: 1000;
    contain: layout style paint;
}

.hint-content {
    padding: var(--spacing-sm) var(--spacing-sm);
    text-align: center;
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    line-height: 1.5;
    white-space: normal;
}

.hint-message {
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-md);
}

.hint-message.hint-warning {
    color: #ffb347;
    font-weight: 600;
}

.hint-description {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    margin-top: var(--spacing-sm);
    line-height: 1.5;
}

.hint-progress-container {
    width: 100%;
    height: 4px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    margin-top: var(--spacing-lg);
    overflow: hidden;
}

.hint-progress {
    height: 100%;
    background: linear-gradient(90deg, 
        rgba(100, 200, 255, 0.8) 0%,
        rgba(150, 220, 255, 0.9) 50%,
        rgba(100, 200, 255, 0.8) 100%);
    border-radius: 2px;
    transition: width 0.3s ease-out;
    box-shadow: 0 0 6px rgba(100, 200, 255, 0.5);
}

.hint-progress.hint-progress-warning {
    background: linear-gradient(90deg,
        rgba(255, 180, 70, 0.8) 0%,
        rgba(255, 200, 100, 0.9) 50%,
        rgba(255, 180, 70, 0.8) 100%);
    box-shadow: 0 0 6px rgba(255, 180, 70, 0.5);
}

/* Version Display - Unobtrusive */
.version-display {
    position: fixed;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    font-size: var(--font-size-xs);
    color: var(--color-text-quaternary);
    font-family: inherit;
    user-select: none;
    pointer-events: none;
    z-index: 1;
    opacity: 0.5;
    transition: opacity var(--transition-base);
    text-align: center;
}

.version-display:hover {
    opacity: 0.8;
}

/* Help Section - Collapsible Guide */
.help-toggle-button {
    /* Inherits from .mode-button, matches musicToggleButton styling */
    font-weight: bold;
    /* Default to inactive (greyed out) */
    background-color: var(--color-gray-100);
    color: #2a2a2a; /* WCAG AA compliant: 7.5:1 contrast ratio on light background (#e0e0e0) */
    border: 2px solid transparent;
    box-sizing: border-box;
}

.help-toggle-button.active {
    /* Active state when content is shown (blue) */
    background-color: var(--color-primary);
    color: white;
    font-weight: bold;
    border: 2px solid transparent;
    box-sizing: border-box;
}

.help-content {
    width: 100%;
    margin: var(--spacing-sm) auto;
    padding: var(--spacing-lg) var(--spacing-xl);
    box-sizing: border-box;
    transition: opacity var(--transition-fast);
    border: 1px solid var(--color-gray-400);
    border-radius: var(--radius-lg);
    opacity: 0.7;
}

.help-content.hidden {
    display: none;
}

.help-text {
    text-align: left;
    font-size: var(--font-size-sm);
    line-height: 1.6;
    color: var(--color-text-secondary);
}

.help-text p {
    margin: var(--spacing-md) 0;
}

.help-text p:first-child {
    margin-top: 0;
}

.help-text p:last-child {
    margin-bottom: 0;
}

.help-text strong {
    color: var(--color-text-primary);
    font-weight: 500;
}

.help-list {
    margin: var(--spacing-md) 0 var(--spacing-md) var(--spacing-2xl);
    padding: 0;
    list-style-type: disc;
    color: var(--color-text-secondary);
}

.help-list li {
    margin: var(--spacing-sm) 0;
    line-height: 1.5;
}