:root {
    /* Amber Family */
    --color-amber-primary: #f4ae3e; /* Daily challenge pill */
    --color-amber-light: #f5b651; /* Unused */
    --color-amber-text: #283547; /* Dark blue text against gold backgrounds */

    /* Green Family */
    --color-green-primary: #72978e; /* Primary action buttons */
    --color-green-hover: #84a59d; /* Cambridge blue hover state */

    /* Rose Family */
    --color-rose-primary: #e16563; /* Clear/Undo buttons, active states */
    --color-rose-hover: #e77b73; /* Hover states for rose buttons */

    /* Neutral/Gray Family */
    --color-neutral-bg-dark: #171717; /* Main background (neutral-900) */
    --color-neutral-bg-medium: #27272a; /* Canvas, dropdowns, secondary bg (zinc-800) */
    --color-neutral-border: #525252; /* Canvas borders (neutral-600) */
    --color-neutral-text: #e5e7eb; /* Leaderboard button text (gray-200) */
    --color-neutral-text-muted: #9ca3af; /* GitHub link hover, instructions (gray-400) */

    /* Utilities */
    --shadow: rgba(0, 0, 0, 0.4); /* Shadows */
}

/* Component Classes */
.main-body {
    background-color: var(--color-neutral-bg-dark);
    color: var(--color-neutral-text);
}

.title {
    color: var(--color-rose-primary);
}

.canvas-element {
    background-color: var(--color-neutral-bg-medium);
    border-color: var(--color-neutral-border);
}

.primary-button {
    background-color: var(--color-green-primary);
}

.secondary-button {
    background-color: var(--color-rose-primary);
}

.message-text {
    color: var(--color-amber-primary);
}

.instruction-text {
    color: var(--color-neutral-text-muted);
}

.dropdown-element {
    background-color: var(--color-neutral-bg-medium);
}

.author-element {
    background-color: var(--color-neutral-bg-medium);
}

.leaderboard-button {
    background-color: var(--color-neutral-bg-medium);
    color: var(--color-neutral-text-medium);
}

/* Animation keyframes */
@keyframes slideDown {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(8deg);
    }
}

/* Screen shake animation */
@keyframes screen-shake {
    0% {
        transform: translate(0, 0);
    }
    20% {
        transform: translate(-2px, 2px);
    }
    40% {
        transform: translate(1px, -1px);
    }
    60% {
        transform: translate(-0.5px, 0.5px);
    }
    80% {
        transform: translate(0.5px, -0.5px);
    }
    100% {
        transform: translate(0, 0);
    }
}

.shake-wrapper {
    position: fixed;
    inset: 0;
    pointer-events: none; /* keeps buttons clickable */
}

.shake-wrapper > * {
    pointer-events: auto; /* restore interactivity to contents */
}

.shake-active {
    animation: screen-shake 0.55s ease-in-out;
}

/* Spinner styles */
.loader {
    width: 120px;
    height: 15px;
    border-radius: 15px;
    background:
        radial-gradient(farthest-side, var(--color-amber-primary) 94%, #0000)
            left/15px 15px no-repeat,
        var(--color-neutral-bg-medium);
    animation: l2 1s infinite linear;
}
@keyframes l2 {
    50% {
        background-position: right;
    }
}

/* Daily Challenge Pill */
.daily-challenge-pill {
    position: fixed;
    top: 90px;
    left: -240px;
    width: 300px;
    height: 50px;
    background: var(--color-amber-primary);
    border-radius: 25px;
    cursor: pointer;
    z-index: 20;
    box-shadow: 2px 2px 10px var(--shadow);
    transition: box-shadow 0.3s ease;
    opacity: 0;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.daily-challenge-pill:hover {
    box-shadow: 4px 4px 15px var(--shadow);
}

.daily-challenge-content {
    position: absolute;
    left: 70px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-amber-text);
    font-weight: 600;
    font-size: 14px;
    opacity: 1;
    white-space: nowrap;
    pointer-events: none;
    width: calc(100% - 80px);
    height: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
}

.daily-challenge-icon {
    position: absolute;
    right: 10px;
    top: 12px;
    font-size: 20px;
    opacity: 1;
    z-index: 10;
    pointer-events: none;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

/* Tempting bounce animation for new users - slide in bouncing */
@keyframes temptingBounce {
    0% {
        transform: translateX(0);
    }
    15% {
        transform: translateX(10px);
    }
    30% {
        transform: translateX(0);
    }
    45% {
        transform: translateX(8px);
    }
    60% {
        transform: translateX(0);
    }
    75% {
        transform: translateX(3px);
    }
    100% {
        transform: translateX(0);
    }
}

.daily-challenge-pill.tempting {
    animation: temptingBounce 1.5s ease-out infinite;
    animation-delay: 1s;
}

/* Locked state */
.locked {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.green {
    background-color: var(--color-green-primary) !important;
}

/* Leaderboard button active state */
#leaderboard-btn.active {
    background-color: var(--color-rose-primary) !important;
}

button {
    touch-action: manipulation;
    user-select: none;
    -webkit-user-select: none; /* Safari */
    -ms-user-select: none; /* IE 10+ */
}

.undo-icon {
    filter: brightness(0) saturate(100%) invert(92%) sepia(3%) saturate(25%)
        hue-rotate(174deg) brightness(98%) contrast(92%);
    transform: rotate(30);
    transition: transform 0.3s ease-in-out;
}

/* Mobile touch effects */
@media (hover: none) {
    #leaderboard-btn.touch-active {
        background-color: var(--color-rose-hover) !important;
    }

    #left-btn:not(.green).touch-active {
        background-color: var(--color-green-hover) !important;
    }

    #right-btn:not(.green).touch-active,
    #undo-btn.touch-active {
        background-color: var(--color-rose-hover) !important;
    }

    .green.touch-active {
        background-color: var(--color-green-hover) !important;
    }

    #undo-btn.touch-active .undo-icon {
        transform: rotate(-20deg);
    }
}

/* Desktop hover effects */
@media (hover: hover) and (pointer: fine) {
    #left-btn:not(.green):hover {
        background-color: var(--color-green-hover); /* Cambridge blue */
        transform: scale(1.1);
        transition: all 0.2s ease;
    }

    #right-btn:not(.green):hover {
        background-color: var(--color-rose-hover) !important; /* rose-300 */
        transform: scale(1.1);
        transition: all 0.2s ease;
    }

    #undo-btn:not(.green):hover {
        background-color: var(--color-rose-hover) !important; /* rose-300 */
        transform: scale(1.1) !important;
        transition: all 0.2s ease;
    }

    .green:hover {
        background-color: var(--color-green-hover) !important;
        transform: scale(1.1);
        transition: all 0.2s ease;
    }

    #undo-btn:hover .undo-icon {
        transform: rotate(-45deg);
        transition: transform 0.3s ease-in-out;
    }

    #undo-btn.green:hover {
        background-color: var(--color-green-hover) !important;
        transform: scale(1.1) !important;
        transition: all 0.2s ease;
    }

    #leaderboard-btn:hover {
        background-color: var(--color-rose-hover) !important;
        transform: scale(1.1);
        transition: all 0.2s ease;
    }

    .github-link:hover {
        color: var(--color-neutral-text-muted) !important;
        transform: scale(1.1);
        transition: all 0.2s ease-in-out;
    }
}