/* CSS Variables for dynamic values (set via JS) */
:root {
    --header-color: #ffffff;
    --header-size: 24px;
    --header-font-weight: 600;
    --header-margin-bottom: 2rem;
    --body-background-color: #ffffff;
    --body-background-image: none;
    --app-justify-content: center;
    --btn-radius: 16px;
    --btn-box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    --btn-box-shadow-active: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* Reset & Base */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.5;
    color: #333;
    background-color: var(--body-background-color);
    background-image: var(--body-background-image);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    min-height: 100dvh;
    overflow-x: hidden;
}

body.no-scroll {
    overflow: hidden;
}

body.app-locked {
    pointer-events: none;
    user-select: none;
    background-color: #ffffff !important;
    background-image: none !important;
}

/* Main App Wrapper */
.app-wrapper {
    position: relative;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    justify-content: var(--app-justify-content);
    width: 100%;
}

/* Header */
.app-header {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 1.25rem;
    margin-bottom: var(--header-margin-bottom);
    color: var(--header-color);
    font-size: var(--header-size);
    font-weight: var(--header-font-weight);
    text-align: center;
    word-wrap: break-word;
    hyphens: auto;
}

.app-header:empty {
    display: none;
}

/* Main Content - Button Area (row: horizontal placement via margin on .button-grid-container) */
.app-main {
    flex: 0 0 auto;
    display: flex;
    flex-direction: row;
    padding: 1.5rem;
}

.app-main.buttons-h-left .button-grid-container {
    margin-left: 0;
    margin-right: auto;
}

.app-main.buttons-h-center .button-grid-container {
    margin-left: auto;
    margin-right: auto;
}

.app-main.buttons-h-right .button-grid-container {
    margin-left: auto;
    margin-right: 0;
}

/* Button Grid Container - Flexbox for alignment */
.button-grid-container {
    display: flex;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

/* Vertical alignment */
.button-grid-container.align-top {
    align-self: flex-start;
}

.button-grid-container.align-center {
    align-self: center;
}

.button-grid-container.align-bottom {
    align-self: flex-end;
}

/* Button Grid - CSS Grid */
.button-grid {
    display: grid;
    gap: 1.5rem;
    width: 100%;
    align-items: start;
}

.button-grid.columns-1 {
    grid-template-columns: 1fr;
}

.button-grid.columns-2 {
    grid-template-columns: repeat(2, 1fr);
}

.button-grid.columns-3 {
    grid-template-columns: repeat(3, 1fr);
}

.button-grid.columns-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* Mobile: max 2 columns for 3-4 column configs, 1 column for single */
@media (max-width: 480px) {
    .button-grid.columns-1 {
        grid-template-columns: 1fr;
    }
    .button-grid.columns-2,
    .button-grid.columns-3,
    .button-grid.columns-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Tablet: up to 3 columns */
@media (min-width: 481px) and (max-width: 768px) {
    .button-grid.columns-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Desktop: full columns */
@media (min-width: 769px) {
    .button-grid-container {
        max-width: 800px;
    }
}

/* Context items - img (proportional) or fallback span */
.context-button {
    display: block;
    width: 100%;
    min-height: 120px;
    border: none;
    border-radius: var(--btn-radius);
    cursor: pointer;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

/* img - width 100%, height auto = naturalne proporcje obrazka */
img.context-button {
    height: auto;
    vertical-align: top;
}

.context-button.is-active {
    filter: brightness(1.4);
}

/* Aktywność już pokazana podmianą grafiki — bez dodatkowego rozjaśnienia */
img.context-button.is-active[data-active-by-image='true'] {
    filter: none;
}

/* Image load error state */
.context-button-error {
    background-color: #4a4a6a;
    min-height: 120px;
}

/* Fallback when no image source */
.context-button-fallback {
    background-color: #4a4a6a;
    color: #fff;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
}

/* Error Message – wyśrodkowany w pionie i poziomie */
.error-message {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    text-align: center;
}

.error-message p {
    color: #333;
    font-size: 1.125rem;
    line-height: 1.6;
    max-width: 400px;
}

/* Toast notification (błąd POST) */
.app-notification {
    position: fixed;
    top: 1rem;
    left: 50%;
    transform: translateX(-50%) translateY(-100%);
    padding: 1rem 1.5rem;
    background: #c53030;
    color: #fff;
    border-radius: 8px;
    font-size: 0.9375rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    z-index: 9999;
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.app-notification--visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}