*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html,
body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    background-image: var(--app-background-overlay-layer), var(--app-background-image);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

@media (hover: none) and (pointer: coarse) {

    html,
    body {
        touch-action: manipulation;
    }

    body,
    body * {
        user-select: none !important;
        -webkit-user-select: none !important;
        -webkit-touch-callout: none;
    }

    input,
    textarea,
    [contenteditable],
    [contenteditable="true"],
    [contenteditable="plaintext-only"] {
        user-select: text !important;
        -webkit-user-select: text !important;
        -webkit-touch-callout: default;
    }
    
    #chart-image-overlay,
    #chart-image-overlay * {
        user-select: auto !important;
        -webkit-user-select: auto !important;
        -webkit-touch-callout: default;
    }

    input:not([type]),
    input[type="text"],
    input[type="search"],
    input[type="email"],
    input[type="url"],
    input[type="tel"],
    input[type="password"],
    input[type="number"],
    textarea,
    [contenteditable],
    [contenteditable="true"],
    [contenteditable="plaintext-only"] {
        font-size: 16px !important;
    }
}

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

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

button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

input,
select,
textarea {
    font-family: inherit;
    font-size: inherit;
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
    padding: var(--space-xs) var(--space-sm);
    outline: none;
    transition: border-color var(--transition-fast);
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--accent);
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238b949e'%3E%3Cpath d='M6 8.5L1 3.5h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    padding-right: 24px;
}

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--surface-border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

.panel {
    background:
        linear-gradient(180deg, var(--panel-sheen), var(--panel-sheen-fade)),
        var(--surface-elevated);
    border: 1px solid var(--surface-border);
    border-radius: 12px;
    overflow: hidden;
    transition: border-radius 0.2s ease;
    backdrop-filter: blur(18px);
    /* box-shadow: var(--shadow-card); */
}

.panel.overflow-visible {
    overflow: visible;
}

.panel.drawer-open {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

@media (max-width: 1100px), (pointer: coarse) {
    .panel {
        border-radius: 20px;
    }
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--surface-border);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    user-select: none;
}

/* Collapsible panels */
.panel.collapsible>.panel-header {
    cursor: pointer;
    transition: background var(--transition-fast);
}

.panel.collapsible>.panel-header:hover {
    background: var(--surface-hover);
}

.collapse-chevron {
    font-size: 18px;
    transition: transform 0.2s ease;
    display: inline-block;
    line-height: 1;
}

.panel.collapsed .collapse-chevron {
    transform: rotate(-90deg);
}

.panel.collapsed>.panel-header {
    border-bottom: none;
}

.collapsible-body {
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.25s ease;
    opacity: 1;
}

.collapsible-body.overflow-visible {
    overflow: visible;
}

.panel.collapsed .graph-legend {
    opacity: 0;
    pointer-events: none;
}

.panel.collapsed .collapsible-body {
    max-height: 0;
    opacity: 0;
    padding-top: 0;
    padding-bottom: 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    border-radius: 999px;
    font-size: var(--text-sm);
    font-weight: 500;
    transition: background var(--transition-fast), color var(--transition-fast);
    user-select: none;
    -webkit-user-select: none;
    min-height: 36px;
}

.btn:hover {
    background: var(--surface-hover);
}

.btn:active {
    background: var(--surface-active);
}

.btn-primary {
    background: var(--accent);
    color: #000;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-icon {
    width: 28px;
    height: 28px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    user-select: none;
    -webkit-user-select: none;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.btn-icon:active {
    transform: scale(0.96);
}

.icon-mask {
    width: 1em;
    height: 1em;
    display: block;
    flex: 0 0 auto;
    pointer-events: none;
    background-color: currentColor;
    -webkit-mask-repeat: no-repeat;
    -webkit-mask-position: center;
    -webkit-mask-size: contain;
    mask-repeat: no-repeat;
    mask-position: center;
    mask-size: contain;
}

.icon-mask-settings {
    width: 1em;
    height: 1em;
    -webkit-mask-image: url('../resources/settings.svg');
    mask-image: url('../resources/settings.svg');
}

.icon-mask-distribution {
    width: 1em;
    height: 1em;
    -webkit-mask-image: url('../resources/distribution.svg');
    mask-image: url('../resources/distribution.svg');
}

.icon-mask-legend {
    width: 1em;
    height: 1em;
    -webkit-mask-image: url('../resources/legend.svg');
    mask-image: url('../resources/legend.svg');
}

@media (min-width: 1101px) and (pointer: fine) {
    #btn-settings .icon-mask-settings {
        width: 0.85em;
        height: 0.85em;
    }
}

.shortcut-hint {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    background: var(--bg-tertiary);
    padding: 1px 5px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--surface-border);
    font-family: var(--font-mono);
}

#shortcut-tooltip {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 2000;
    padding: 5px 8px;
    border-radius: var(--radius-md);
    border: 1px solid var(--surface-border);
    background: var(--tooltip-surface);
    color: var(--text-secondary);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', sans-serif;
    font-weight: 500;
    font-size: var(--text-xs);
    line-height: 1;
    white-space: nowrap;
    box-shadow: var(--shadow-md);
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transform: translate(-50%, -4px);
    transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

#shortcut-tooltip.no-transition {
    transition: none;
}

#shortcut-tooltip[data-placement="right"] {
    transform: translate(4px, -50%);
}

#shortcut-tooltip[data-placement="top"] {
    transform: translate(-50%, -4px);
}

#shortcut-tooltip::before {
    content: '';
    position: absolute;
    left: 50%;
    top: -5px;
    transform: translateX(-50%) rotate(45deg);
    width: 8px;
    height: 8px;
    background: var(--tooltip-surface);
    border-left: 1px solid var(--surface-border);
    border-top: 1px solid var(--surface-border);
}

#shortcut-tooltip[data-placement="right"]::before {
    left: -5px;
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
    border-left: 1px solid var(--surface-border);
    border-top: 0;
    border-bottom: 1px solid var(--surface-border);
}

#shortcut-tooltip[data-placement="top"]::before {
    left: 50%;
    top: auto;
    bottom: -5px;
    transform: translateX(-50%) rotate(45deg);
    border-left: 0;
    border-top: 0;
    border-right: 1px solid var(--surface-border);
    border-bottom: 1px solid var(--surface-border);
}

#shortcut-tooltip.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, 0);
}

#shortcut-tooltip[data-placement="right"].active {
    transform: translate(0, -50%);
}

#shortcut-tooltip[data-placement="top"].active {
    transform: translate(-50%, 0);
}

body.shortcut-tooltips-disabled #shortcut-tooltip,
body.coarse-pointer #shortcut-tooltip {
    display: none;
}



/* Zen mode — hide panels but keep grid intact so timer doesn't shift */
body.zen #left-panel,
body.zen #right-panel {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

body.zen #btn-settings,
body.zen #scramble-type-menu-desktop,
body.zen #scramble-type-menu-mobile,
body.zen:not(.mobile-viewport) #btn-edit-scramble,
body.zen:not(.mobile-viewport) #btn-copy-scramble,
body.zen:not(.mobile-viewport) #btn-prev-scramble,
body.zen:not(.mobile-viewport) #btn-next-scramble {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

body.zen #btn-zen {
    opacity: 1;
    background: transparent;
}

body.zen.mobile-viewport #btn-zen {
    background: var(--surface-ghost);
}

body.zen.mobile-viewport .mobile-session-select-wrapper {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, visibility 0s linear 0.3s;
}

body.zen #scramble-type-menu-desktop,
body.zen #scramble-type-menu-mobile {
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0s linear 0.3s;
}

body.zen.mobile-viewport #scramble-top-row {
    justify-content: flex-end;
}


/* Smooth transitions back when exiting zen */
#left-panel,
#right-panel,
#btn-settings,
#scramble-container,
#timer-info,
#timer-display-wrapper {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

body.instant-mobile-timer-layout #scramble-container,
body.instant-mobile-timer-layout #timer-display-wrapper {
    transition: none !important;
}