/* ===== Global Base ===== */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

/* Utility for conditional display from JavaScript. */
.hidden {
    display: none !important;
}

/* ===== Challenge Header ===== */
.challenge-bar {
    position: relative;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 88px;
    padding: 1.5rem;
    background-color: var(--challenge-bar-bg);
    overflow: hidden;
}

.challenge-bar * {
    margin: auto;
    padding: 0;
    font-size: 20px;
}

.challenge-bar > :not(#fullscreen-challenge-title) {
    position: relative;
    z-index: 1;
}

#start-challenge {
    display: block;
    margin: 2rem auto;
    background-color: var(--bg-card);
    border-radius: 8px;
    box-shadow: 4px 4px 6px var(--shadow-card);
    padding: 1rem 2rem;
    color: var(--text-primary);
    font-size: 18px;
    font-weight: 500;
    cursor: pointer;
}

#start-challenge:hover {
    background-color: var(--bg-navbar);
    color: var(--text-navbar);
}

/* Fullscreen title element that animates down to become the challenge bar. */
#fullscreen-challenge-title {
    --challenge-intro-delay: 1.5s;
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0.75rem;
    width: 100vw;
    min-height: 100vh;
    padding: 2rem;
    background-color: var(--challenge-bar-bg);
    text-align: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
}

#fullscreen-challenge-title.active {
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
}

#fullscreen-challenge-title.receding {
    animation: full-screen-to-bar 1s ease-in var(--challenge-intro-delay) forwards;
}

#fullscreen-challenge-title h1,
#fullscreen-challenge-title h2,
#fullscreen-challenge-title h3 {
    margin: 0;
}

#fullscreen-challenge-title h1 {
    font-size: clamp(2.75rem, 7vw, 5rem);
}

#fullscreen-challenge-title h2 {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 500;
}

#fullscreen-challenge-word {
    font-size: clamp(2.5rem, 8vw, 6rem);
    text-transform: capitalize;
}

/* ===== Main Layout ===== */
.challenge-container {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: flex-start;
    gap: 2rem;
    padding: 1.5rem;
}

.drawing-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

/* Primary drawing surface shown to users. */
#drawingCanvas {
    width: 600px;
    height: 600px;
    background-color: white;
    border: 2px dotted var(--text-secondary);
    border-radius: 8px;
    box-shadow: 4px 4px 6px var(--shadow-card);
    cursor: url('../media/paint-brush-cursur.png'), crosshair;
    touch-action: none;
    user-select: none;
}

/* Small model-input preview canvas for debugging. */
#debugCanvas {
    width: 112px;
    height: 112px;
    border: 1px solid var(--text-secondary);
    image-rendering: pixelated;
    background-color: white;
    display: block;
}

/* ===== Canvas Controls ===== */
.canvas-controls {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 0.5rem 1rem;
    background-color: var(--challenge-bar-bg);
    border: 1px solid var(--text-secondary);
    border-radius: 8px;
}

.color-picker {
    display: flex;
    flex-direction: row;
    gap: 0.5rem;
    align-items: center;
    justify-content: flex-start;
}

.color-picker label {
    font-size: 16px;
    color: var(--text-primary);
}

#color {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.button-group {
    display: flex;
    flex-direction: row;
    gap: 1rem;
    justify-content: flex-end;
    margin-left: auto;
}

/* Shared shape/typography for all canvas action buttons. */
#quit,
#undo,
#clear-canvas,
#save {
    border-radius: 8px;
    box-shadow: 4px 4px 6px var(--shadow-card);
    padding: 0.5rem 1rem;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
}

#quit {
    background-color: var(--bg-quit);
    border: 2px solid var(--border-quit);
    color: var(--text-quit);
}

#quit:hover {
    background-color: var(--bg-quit-hover);
}

#undo {
    background-color: var(--bg-undo);
    border: 2px solid var(--border-undo);
    color: var(--text-undo);
}

#undo:hover {
    background-color: var(--bg-undo-hover);
}

#clear-canvas {
    background-color: var(--bg-clear);
    border: 2px solid var(--border-clear);
    color: var(--text-clear);
}

#clear-canvas:hover {
    background-color: var(--bg-clear-hover);
}

#save {
    background-color: var(--bg-save);
    border: 2px solid var(--border-save);
    color: var(--text-save);
}

#save:hover {
    background-color: var(--bg-save-hover);
}

/* ===== Guess Panel ===== */
#guesses {
    width: 300px;
    padding: 1rem;
    background-color: var(--bg-card);
    border-radius: 8px;
    box-shadow: 4px 4px 6px var(--shadow-card);
}

.guess-list {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 0.5rem;
}

.guess-item {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    margin: 0.5rem 0;
    padding: 0.5rem 1rem;
    background-color: var(--bg-card);
    border-radius: 8px;
    box-shadow: 4px 4px 6px var(--shadow-card);
}

/* ===== Completion Overlay ===== */
#overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

#challenge-complete-overlay {
    background-color: var(--bg-card);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 4px 4px 6px var(--shadow-card);
    text-align: center;
}

/* Apply identical framing to generated canvas and saved image preview. */
#challenge-complete-overlay {
    width: auto;
    height: auto;
    margin-top: 1rem;
    border: 1px solid var(--text-secondary);
    image-rendering: auto;
    background-color: var(--bg-card);
}

#challenge-complete-overlay h2 {
    margin: 0;
    padding: 0;
    font-size: 1.5rem;
    color: var(--text-primary);
}

#challenge-result {
    margin: 0.5rem 0 0 0;
    padding: 0;
    font-size: 1.125rem;
    color: var(--text-secondary);
}

#image-container {
    display: flex;
    flex-direction: row;
    gap: 2rem;
    justify-content: center;
    align-items: center;
}

#result-canvas-container,
#comparison-image-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
}

#result-canvas-container h1,
#comparison-image-container h1 {
    width: 15rem;
    height: auto;
    margin: 0;
    padding: 0;
    font-size: 1.25rem;
    color: var(--text-primary);
}

#result-canvas,
#comparison-image {
    width: 15rem;
    height: 15rem;
    border: 1px solid var(--text-secondary);
    image-rendering: pixelated;
    background-color: var(--bg-card);
}

#confirm-button {
    margin-top: 1.5rem;
    background-color: var(--bg-undo);
    border: 2px solid var(--border-undo);
    color: var(--text-undo);
    padding: 0.75rem 1.5rem;
    font-size: 16px;
    font-weight: 500;
    border-radius: 8px;
    box-shadow: 4px 4px 6px var(--shadow-card);
    font-family: 'Inter', sans-serif;
    cursor: pointer;
}

#confirm-button:hover {
    animation: pulse 0.5s ease-in-out;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

/* ===== Challenge intro styles ===== */
#challenge-intro {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem;
    text-align: center;
}

#challenge-intro h1 {
    margin: 0;
    padding: 0;
    font-size: clamp(2.75rem, 7vw, 5rem);
}

#challenge-intro p {
    margin: 0;
    padding: 0;
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    color: var(--text-secondary);
}

#challenge-intro h2 {
    margin: 0;
    padding: 0;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 500;
}

.difficulty-selector {
    display: flex;
    flex-direction: row;
    gap: 1rem;
}

.difficulty-selector label {
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 16px;
    color: var(--text-primary);
}

.difficulty-selector select {
    padding: 0.5rem 1rem;
    border-radius: 8px;
    border: 1px solid rgba(0, 0, 0, 0.2);
    background: #ffffff;
    color: black;
}

.difficulty-selector select option {
    background: #ffffff;
    color: black;
}

#show-words {
    background-color: var(--show-words-bg);
    border: 2px solid var(--show-words-border);
    color: var(--show-words-text);
    padding: 0.75rem 1.5rem;
    font-size: 16px;
    font-weight: 500;
    border-radius: 8px;
    box-shadow: 4px 4px 6px var(--shadow-card);
    font-family: 'Inter', sans-serif;
    cursor: pointer;
}

#show-words:hover {
    background-color: var(--bg-navbar);
    color: var(--text-navbar);
}

#start-challenge {
    width: 15rem;
    height: auto;
    background-color: var(--bg-undo);
    border: 2px solid var(--border-undo);
    color: var(--text-undo);
    padding: 0.75rem 1.5rem;
    font-size: auto;
    font-weight: 500;
    border-radius: 8px;
    box-shadow: 4px 4px 6px var(--shadow-card);
    font-family: 'Inter', sans-serif;
    cursor: pointer;
}

#start-challenge:hover {
    background-color: var(--bg-undo-hover);
    Animation: pulse 0.5s ease-in-out;
}


/* ===== Challenge Bar Animations ===== */
/* Should take a fullscreen element and shrink it down to the size of the challenge bar, and then disappear. */
@keyframes full-screen-to-bar {
    0% {
        transform: translateY(0);
        height: 100vh;
        opacity: 1;
    }
    70% {
        transform: translateY(calc(-100vh + 88px));
        height: 100vh;
        opacity: 1;
    }
    100% {
        transform: translateY(calc(-100vh + 88px));
        height: 88px;
        opacity: 0;
    }
}

/* ===== Small screens ===== */
@media screen and (max-width: 960px) {
    .challenge-container {
        flex-direction: column;
        align-items: center;
        padding: 1rem;
    }

    .challenge-bar {
        flex-wrap: wrap;
        gap: 0.5rem;
        padding: 0.75rem;
    }

    .challenge-bar * {
        font-size: 16px;
    }

    #drawingCanvas {
        width: 90vw;
        height: 90vw;
    }

    .drawing-area {
        width: 90vw;
    }

    .canvas-controls {
        flex-direction: row;
        align-items: center;
        flex-wrap: wrap;
        gap: 0.5rem;
        width: 100%;
    }

    .button-group {
        flex-wrap: wrap;
        gap: 0.5rem;
        justify-content: flex-end;
        margin-left: auto;
    }

    #guesses {
        width: 90vw;
    }

    .difficulty-selector {
        flex-direction: column;
        align-items: flex-start;
    }

    /* Overlay image comparison stacks vertically on small screens */
    #image-container {
        flex-direction: column;
        gap: 1rem;
    }

    #result-canvas-container h1,
    #comparison-image-container h1 {
        width: 100%;
    }

    #result-canvas,
    #comparison-image {
        width: min(15rem, 80vw);
        height: min(15rem, 80vw);
    }
}