/* Theme Variable Definitions */
:root {
    --altcha-color-base: #ffffff;
    --altcha-color-text: #333333;
    --altcha-color-border: #a0a0a0;
    --altcha-color-border-focus: #1D1DC9;
    --altcha-color-active: #1D1DC9;
    --altcha-color-footer-bg: transparent;
    --altcha-color-error-text: #f23939;
    --altcha-shadow: rgba(0, 0, 0, 0.2);
    --altcha-backdrop: rgba(0, 0, 0, 0.5);
    --altcha-input-bg: #ffffff;
}

@media (prefers-color-scheme: dark) {
    :root {
        --altcha-color-base: #1e293b; /* slate-800 */
        --altcha-color-text: #f1f5f9; /* slate-100 */
        --altcha-color-border: #475569; /* slate-600 */
        --altcha-color-border-focus: #3b82f6; /* blue-500 */
        --altcha-color-active: #3b82f6;
        --altcha-color-footer-bg: rgba(0, 0, 0, 0.2);
        --altcha-color-error-text: #fb7185; /* rose-400 */
        --altcha-shadow: rgba(0, 0, 0, 0.5);
        --altcha-backdrop: rgba(0, 0, 0, 0.8);
        --altcha-input-bg: #0f172a; /* slate-900 */
    }
}

.altcha {
    background: var(--altcha-color-base);
    border: var(--altcha-border-width, 1px) solid var(--altcha-color-border);
    border-radius: var(--altcha-border-radius, 3px);
    color: var(--altcha-color-text);
    display: flex;
    flex-direction: column;
    max-width: var(--altcha-max-width, 260px);
    position: relative;
}

    .altcha:focus-within {
        border-color: var(--altcha-color-border-focus);
    }

    .altcha[data-floating] {
        background: var(--altcha-color-base);
        display: none;
        filter: drop-shadow(3px 3px 6px var(--altcha-shadow));
        left: -100%;
        position: fixed;
        top: -100%;
        width: var(--altcha-max-width, 260px);
        z-index: 999999;
    }

    .altcha[data-floating=top] .altcha-anchor-arrow {
        border-bottom-color: transparent;
        border-top-color: var(--altcha-color-border);
        bottom: -12px;
        top: auto;
    }

    .altcha[data-floating=bottom]:focus-within:after {
        border-bottom-color: var(--altcha-color-border-focus);
    }

    .altcha[data-floating=top]:focus-within:after {
        border-top-color: var(--altcha-color-border-focus);
    }

    .altcha[data-floating]:not([data-state=unverified]) {
        display: block;
    }

.altcha-anchor-arrow {
    border: 6px solid transparent;
    border-bottom-color: var(--altcha-color-border);
    content: "";
    height: 0;
    left: 12px;
    position: absolute;
    top: -12px;
    width: 0;
}

.altcha-main {
    align-items: center;
    display: flex;
    gap: .4rem;
    padding: .7rem;
    position: relative;
}

.altcha-code-challenge {
    background: var(--altcha-color-base);
    border: 1px solid var(--altcha-color-border-focus);
    border-radius: var(--altcha-border-radius, 3px);
    filter: drop-shadow(3px 3px 6px var(--altcha-shadow));
    padding: .5rem;
    position: absolute;
    top: 2.5rem;
    z-index: 9999999;
}

    .altcha-code-challenge > form {
        display: flex;
        flex-direction: column;
        gap: .5rem;
    }

.altcha-code-challenge-input {
    background: var(--altcha-input-bg);
    color: var(--altcha-color-text);
    border: 1px solid var(--altcha-color-border);
    border-radius: 3px;
    box-sizing: border-box;
    outline: none;
    font-size: 16px;
    padding: .35rem;
    width: 220px;
}

    .altcha-code-challenge-input:focus {
        outline: 2px solid color-mix(in srgb, var(--altcha-color-active) 20%, transparent);
        border-color: var(--altcha-color-active);
    }

    .altcha-code-challenge-input:disabled {
        opacity: .7;
    }

.altcha-code-challenge-image {
    background-color: #fff; /* Keep white for QR/Image clarity usually */
    border: 1px solid var(--altcha-color-border);
    border-radius: 3px;
    box-sizing: border-box;
    object-fit: contain;
    height: 50px;
    width: 220px;
}

.altcha-code-challenge-audio, .altcha-code-challenge-reload {
    background: color-mix(in srgb, var(--altcha-color-text) 10%, transparent);
    border: 0;
    border-radius: 3px;
    color: var(--altcha-color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: .35rem;
}

    .altcha-code-challenge-audio:disabled, .altcha-code-challenge-reload:disabled {
        opacity: .7;
        pointer-events: none;
    }

    .altcha-code-challenge-audio > *, .altcha-code-challenge-reload > * {
        height: 20px;
        width: 20px;
    }

.altcha-code-challenge-buttons {
    display: flex;
    justify-content: space-between;
}

.altcha-code-challenge-buttons-left {
    display: flex;
    gap: .25rem;
}

.altcha-code-challenge-verify {
    align-items: center;
    background: var(--altcha-color-active);
    border: 0;
    border-radius: 3px;
    color: #fff;
    cursor: pointer;
    display: flex;
    gap: .5rem;
    font-size: 100%;
    padding: .35rem 1rem;
}

    .altcha-code-challenge-verify:disabled {
        opacity: .7;
        pointer-events: none;
    }

.altcha-code-challenge-arrow {
    border: 6px solid transparent;
    border-bottom-color: var(--altcha-color-border);
    content: "";
    height: 0;
    left: .15rem;
    position: absolute;
    top: -12px;
    width: 0;
}

.altcha[data-floating=top] .altcha-code-challenge {
    top: -150px;
}

.altcha[data-floating=top] .altcha-code-challenge-arrow {
    border-bottom-color: transparent;
    border-top-color: var(--altcha-color-border);
    bottom: -12px;
    top: auto;
}

.altcha-label {
    cursor: pointer;
    flex-grow: 1;
}

.altcha-logo {
    color: var(--altcha-color-text) !important;
    opacity: .7;
}

    .altcha-logo:hover {
        opacity: 1;
    }

.altcha-error {
    color: var(--altcha-color-error-text);
    display: flex;
    font-size: .85rem;
    gap: .3rem;
    padding: 0 .7rem .7rem;
}

.altcha-footer {
    align-items: center;
    background-color: var(--altcha-color-footer-bg);
    display: flex;
    font-size: .75rem;
    opacity: .7;
    justify-content: end;
    padding: .2rem .7rem;
}

    .altcha-footer:hover {
        opacity: 1;
    }

    .altcha-footer a {
        color: var(--altcha-color-text);
    }

.altcha-checkbox {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 24px;
    position: relative;
    width: 24px;
}

    .altcha-checkbox .altcha-spinner {
        inset: 0;
        position: absolute;
    }

    .altcha-checkbox input {
        width: 18px;
        height: 18px;
        margin: 0;
    }

.altcha-checkbox-verifying input {
    appearance: none;
    opacity: 0;
    pointer-events: none;
}

.altcha-spinner {
    animation: altcha-spinner .75s infinite linear;
    transform-origin: center;
}

.altcha-overlay {
    background: var(--altcha-color-base);
    color: var(--altcha-color-text);
    animation: overlay-slidein .5s forwards;
    display: flex;
    flex-direction: column;
    gap: .5rem;
    left: 50%;
    width: 260px;
    opacity: 0;
    position: fixed;
    top: 45%;
    transform: translate(-50%, -50%);
    border-radius: 8px;
    padding: 1rem;
    box-shadow: 0 10px 25px var(--altcha-shadow);
}

.altcha-overlay-backdrop {
    background: var(--altcha-backdrop);
    display: none;
    inset: 0;
    position: fixed;
    z-index: 99999999;
}

.altcha-overlay-close-button {
    align-self: flex-end;
    background: none;
    border: none;
    padding: .25rem;
    cursor: pointer;
    color: var(--altcha-color-text);
    font-size: 130%;
    line-height: 1;
    opacity: .7;
}

@media (max-height: 450px) {
    .altcha-overlay {
        top: 10% !important;
        transform: translate(-50%);
    }
}

@keyframes overlay-slidein {
    to {
        opacity: 1;
        top: 50%;
    }
}

@keyframes altcha-spinner {
    to {
        transform: rotate(360deg);
    }
}