/* =========================================================
   ALPHABET TRACING PRACTICE
   /interactive-learning-tools/alphabet-tracing/
   ========================================================= */

.at-practice-page {
    --at-navy: #16324f;
    --at-navy-dark: #10283f;
    --at-teal: #159a9c;
    --at-teal-dark: #117d7f;
    --at-teal-soft: #e9f7f7;
    --at-green: #198754;
    --at-green-soft: #eaf7ef;
    --at-red: #dc3545;
    --at-red-soft: #fcebec;
    --at-amber: #b7791f;
    --at-amber-soft: #fff8e7;
    --at-blue: #2f6ea5;
    --at-blue-soft: #eef6fc;
    --at-purple: #7c3aed;
    --at-purple-soft: #f3efff;
    --at-text: #263746;
    --at-muted: #667788;
    --at-border: #d9e2e8;
    --at-border-light: #e8eef2;
    --at-bg: #f5f8fa;
    --at-white: #ffffff;
    --at-shadow: 0 12px 34px rgba(22, 50, 79, 0.10);
    --at-shadow-small: 0 5px 18px rgba(22, 50, 79, 0.08);

    color: var(--at-text);
    font-family: "Inter", sans-serif;
}

.at-practice-page *,
.at-practice-page *::before,
.at-practice-page *::after {
    box-sizing: border-box;
}

.at-practice-page button,
.at-practice-page select {
    font-family: inherit;
}

.at-practice-page button {
    -webkit-tap-highlight-color: transparent;
}

.at-practice-page [hidden] {
    display: none !important;
}

/* PRACTICE SECTION */
.at-section {
    padding: 4.5rem 1.5rem;
    background: linear-gradient(180deg, #ffffff 0%, #f7fafb 55%, #ffffff 100%);
}

.at-app {
    width: min(1180px, 100%);
    margin: 0 auto;
}

.at-eyebrow {
    margin: 0 0 0.45rem;
    color: var(--at-teal-dark);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

/* TOOLBAR */
.at-toolbar {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 2rem;
    margin-bottom: 1.75rem;
}

.at-toolbar-heading {
    max-width: 760px;
}

.at-toolbar-heading h2,
.at-info-heading h2 {
    margin: 0 0 0.65rem;
    color: var(--at-navy);
    font-size: clamp(1.65rem, 3vw, 2.3rem);
    font-weight: 800;
    line-height: 1.15;
}

.at-toolbar-heading > p:last-child,
.at-info-heading > p:last-child {
    margin: 0;
    color: var(--at-muted);
    font-size: 0.98rem;
    line-height: 1.7;
}

.at-controls,
.at-control-group {
    display: flex;
}

.at-controls {
    flex-wrap: wrap;
    gap: 1rem;
}

.at-control-group {
    flex-direction: column;
    gap: 0.4rem;
}

.at-control-group label {
    color: var(--at-navy);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.at-select {
    min-width: 210px;
    min-height: 48px;
    padding: 0.75rem 2.6rem 0.75rem 0.9rem;
    border: 1px solid var(--at-border);
    border-radius: 0.65rem;
    background-color: var(--at-white);
    color: var(--at-text);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.at-select:focus {
    border-color: var(--at-teal);
    box-shadow: 0 0 0 3px rgba(21, 154, 156, 0.14);
}

/* LETTER SELECTOR */
.at-letter-selector {
    margin-bottom: 1.5rem;
    padding: 1.15rem;
    border: 1px solid var(--at-border-light);
    border-radius: 1rem;
    background: var(--at-white);
    box-shadow: var(--at-shadow-small);
}

.at-letter-selector-heading,
.at-progress-text,
.at-canvas-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.at-letter-selector-heading {
    margin-bottom: 0.85rem;
}

.at-selector-label,
.at-canvas-heading span:first-child {
    color: var(--at-navy);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.at-selector-help {
    color: var(--at-muted);
    font-size: 0.84rem;
    font-weight: 600;
}

.at-letter-buttons {
    display: grid;
    grid-template-columns: repeat(13, minmax(42px, 1fr));
    gap: 0.55rem;
}

.at-letter-button {
    display: grid;
    place-items: center;
    min-width: 42px;
    min-height: 46px;
    padding: 0.4rem;
    border: 1px solid var(--at-border);
    border-radius: 0.65rem;
    background: var(--at-white);
    color: var(--at-navy);
    font-size: 1rem;
    font-weight: 800;
    cursor: pointer;
    transition: transform 0.18s ease, border-color 0.18s ease,
        background-color 0.18s ease, color 0.18s ease,
        box-shadow 0.18s ease;
}

.at-letter-button:hover {
    border-color: var(--at-teal);
    color: var(--at-teal-dark);
    transform: translateY(-1px);
}

.at-letter-button:focus-visible,
.at-icon-button:focus-visible,
.at-secondary-button:focus-visible,
.at-primary-button:focus-visible,
.at-resource-link:focus-visible {
    outline: 3px solid rgba(21, 154, 156, 0.28);
    outline-offset: 3px;
}

.at-letter-button.is-active,
.at-letter-button[aria-pressed="true"] {
    border-color: var(--at-teal);
    background: var(--at-teal);
    color: var(--at-white);
    box-shadow: 0 5px 14px rgba(21, 154, 156, 0.24);
}

.at-letter-button.is-complete {
    border-color: #b9dfc9;
    background: var(--at-green-soft);
    color: var(--at-green);
}

.at-letter-button.is-complete.is-active {
    border-color: var(--at-teal);
    background: var(--at-teal);
    color: var(--at-white);
}

/* PROGRESS */
.at-progress-area {
    margin-bottom: 1.25rem;
}

.at-progress-text {
    margin-bottom: 0.5rem;
    color: var(--at-muted);
    font-size: 0.83rem;
    font-weight: 700;
}

.at-progress-track {
    height: 10px;
    overflow: hidden;
    border-radius: 999px;
    background: #e3eaee;
}

.at-progress-bar {
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--at-teal), #33b8aa);
    transition: width 0.35s ease;
}

/* MAIN CARD */
.at-card {
    overflow: hidden;
    border: 1px solid var(--at-border-light);
    border-radius: 1.2rem;
    background: var(--at-white);
    box-shadow: var(--at-shadow);
}

.at-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    padding: 1.25rem 1.4rem;
    border-bottom: 1px solid var(--at-border-light);
    background: linear-gradient(135deg, #ffffff, var(--at-teal-soft));
}

.at-card-label {
    margin: 0 0 0.25rem;
    color: var(--at-teal-dark);
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.at-trace-instruction {
    margin: 0;
    color: var(--at-navy);
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.5;
}

.at-card-actions {
    flex: 0 0 auto;
}

.at-icon-button,
.at-secondary-button,
.at-primary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    min-height: 48px;
    padding: 0.72rem 1rem;
    border-radius: 0.7rem;
    font-size: 0.9rem;
    font-weight: 800;
    cursor: pointer;
    transition: transform 0.18s ease, background-color 0.18s ease,
        border-color 0.18s ease, box-shadow 0.18s ease;
}

.at-icon-button {
    border: 1px solid rgba(21, 154, 156, 0.3);
    background: var(--at-white);
    color: var(--at-teal-dark);
}

.at-icon-button:hover,
.at-secondary-button:hover {
    border-color: var(--at-teal);
    background: var(--at-teal-soft);
    transform: translateY(-1px);
}

/* TRACING WORKSPACE */
.at-tracing-layout {
    display: grid;
    grid-template-columns: 230px minmax(0, 1fr);
    gap: 1.5rem;
    padding: 1.5rem;
}

.at-letter-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 360px;
    padding: 1.35rem;
    border: 1px solid #cfe8e8;
    border-radius: 1rem;
    background: linear-gradient(160deg, var(--at-teal-soft), #ffffff);
    text-align: center;
}

.at-letter-info-label {
    color: var(--at-teal-dark);
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.at-current-letter {
    margin: 0.3rem 0;
    color: var(--at-navy);
    font-size: clamp(6rem, 12vw, 9rem);
    font-weight: 800;
    line-height: 1;
}

.at-letter-info p {
    margin: 0.4rem 0 1rem;
    color: var(--at-text);
    font-size: 1rem;
    font-weight: 700;
}

.at-example-icon {
    display: grid;
    place-items: center;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--at-white);
    color: var(--at-teal-dark);
    font-size: 1.5rem;
    box-shadow: var(--at-shadow-small);
}

.at-canvas-area {
    min-width: 0;
}

.at-canvas-heading {
    margin-bottom: 0.65rem;
}

.at-canvas-heading span:last-child {
    padding: 0.35rem 0.65rem;
    border-radius: 999px;
    background: var(--at-blue-soft);
    color: var(--at-blue);
    font-size: 0.78rem;
    font-weight: 800;
}

.at-tracing-stage {
    position: relative;
    width: min(100%, 620px);
    aspect-ratio: 1 / 1;
    margin: 0 auto;
    overflow: hidden;
    border: 2px solid var(--at-border);
    border-radius: 1rem;
    background-color: #fffef9;
    background-image: radial-gradient(circle, rgba(22, 50, 79, 0.045) 1px, transparent 1px);
    background-size: 18px 18px;
    box-shadow: inset 0 0 24px rgba(22, 50, 79, 0.035);
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
}

.at-letter-guide,
.at-tracing-canvas {
    position: absolute;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
}

.at-letter-guide {
    z-index: 1;
    overflow: visible;
}

.at-tracing-canvas {
    z-index: 2;
    cursor: crosshair;
    touch-action: none;
}

#guideLines line {
    stroke: #d6dee4;
    stroke-width: 2;
    stroke-dasharray: 8 8;
}

#guideLines line:nth-child(2) {
    stroke: #c7d3db;
}

.at-guide-path {
    fill: none;
    stroke: #aab7c1;
    stroke-width: 34;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 2 16;
}

.at-guide-path.is-active {
    stroke: var(--at-teal);
    opacity: 0.72;
}

.at-guide-path.is-complete {
    stroke: #91cfa8;
    opacity: 0.65;
}

.at-start-dot {
    fill: var(--at-green);
    stroke: var(--at-white);
    stroke-width: 5;
    filter: drop-shadow(0 3px 4px rgba(25, 135, 84, 0.28));
    transform-box: fill-box;
    transform-origin: center;
    animation: at-pulse 1.7s ease-in-out infinite;
}

.at-direction-arrow {
    fill: none;
    stroke: var(--at-green);
    stroke-width: 7;
    stroke-linecap: round;
    marker-end: url(#arrowhead);
}

.at-canvas-help {
    margin: 0.65rem 0 0;
    color: var(--at-muted);
    font-size: 0.84rem;
    line-height: 1.5;
    text-align: center;
}

/* FEEDBACK AND ACTIONS */
.at-feedback {
    margin: 0 1.5rem;
    padding: 0.9rem 1rem;
    border: 1px solid var(--at-border);
    border-radius: 0.75rem;
    font-size: 0.92rem;
    font-weight: 700;
    line-height: 1.5;
    text-align: center;
}

.at-feedback-neutral {
    border-color: #cfe1ee;
    background: var(--at-blue-soft);
    color: #285a82;
}

.at-feedback-success {
    border-color: #b9dfc9;
    background: var(--at-green-soft);
    color: var(--at-green);
}

.at-feedback-try-again {
    border-color: #f0c5ca;
    background: var(--at-red-soft);
    color: #a92f3b;
}

.at-action-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    padding: 1.25rem 1.5rem 1.5rem;
}

.at-secondary-button {
    border: 1px solid var(--at-border);
    background: var(--at-white);
    color: var(--at-navy);
}

.at-primary-button {
    border: 1px solid var(--at-teal);
    background: var(--at-teal);
    color: var(--at-white);
    box-shadow: 0 6px 16px rgba(21, 154, 156, 0.22);
}

.at-primary-button:hover {
    border-color: var(--at-teal-dark);
    background: var(--at-teal-dark);
    transform: translateY(-1px);
}

.at-icon-button:disabled,
.at-secondary-button:disabled,
.at-primary-button:disabled,
.at-letter-button:disabled {
    cursor: not-allowed;
    opacity: 0.52;
    transform: none;
}

/* CELEBRATION */
.at-celebration {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 0 1.5rem 1.5rem;
    padding: 1rem 1.1rem;
    border: 1px solid #f1d696;
    border-radius: 0.85rem;
    background: var(--at-amber-soft);
}

.at-celebration-icon {
    display: grid;
    place-items: center;
    flex: 0 0 48px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: #f8c84b;
    color: var(--at-white);
    font-size: 1.25rem;
    animation: at-star-pop 0.45s ease both;
}

.at-celebration strong {
    display: block;
    margin-bottom: 0.2rem;
    color: var(--at-navy);
}

.at-celebration p {
    margin: 0;
    color: var(--at-text);
    line-height: 1.5;
}

/* RESULTS */
.at-results-panel {
    margin-top: 1.5rem;
    padding: 2.5rem 1.5rem;
    border: 1px solid #cfe8e8;
    border-radius: 1.2rem;
    background: linear-gradient(145deg, var(--at-teal-soft), #ffffff);
    box-shadow: var(--at-shadow);
    text-align: center;
}

.at-results-icon {
    display: grid;
    place-items: center;
    width: 72px;
    height: 72px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    background: var(--at-amber-soft);
    color: var(--at-amber);
    font-size: 2rem;
}

.at-results-eyebrow {
    margin: 0 0 0.35rem;
    color: var(--at-teal-dark);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.at-results-panel h2 {
    margin: 0 0 0.65rem;
    color: var(--at-navy);
    font-weight: 800;
}

.at-results-message {
    max-width: 600px;
    margin: 0 auto 1.25rem;
    color: var(--at-muted);
    line-height: 1.7;
}

/* INFORMATION SECTIONS */
.at-info-section,
.at-tips-section,
.at-resources-section {
    padding: 4.5rem 1.5rem;
}

.at-info-section {
    background: var(--at-white);
}

.at-tips-section {
    background: var(--at-bg);
}

.at-resources-section {
    background: var(--at-white);
}

.at-info-container {
    width: min(1100px, 100%);
    margin: 0 auto;
}

.at-info-heading {
    max-width: 760px;
    margin-bottom: 2rem;
}

.at-example-grid,
.at-tips-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
}

.at-example-card,
.at-tip-card {
    border: 1px solid var(--at-border-light);
    border-radius: 1rem;
    background: var(--at-white);
    box-shadow: var(--at-shadow-small);
}

.at-example-card {
    padding: 1.5rem;
}

.at-example-card .at-example-icon {
    margin-bottom: 1rem;
    background: var(--at-teal-soft);
    box-shadow: none;
}

.at-example-card h3,
.at-tip-card h3 {
    margin: 0 0 0.55rem;
    color: var(--at-navy);
    font-size: 1.05rem;
    font-weight: 800;
}

.at-example-card p,
.at-tip-card p {
    margin: 0;
    color: var(--at-muted);
    font-size: 0.92rem;
    line-height: 1.65;
}

.at-tip-card {
    display: flex;
    gap: 1rem;
    padding: 1.35rem;
}

.at-tip-card > span {
    display: grid;
    place-items: center;
    flex: 0 0 42px;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--at-teal);
    color: var(--at-white);
    font-size: 1rem;
    font-weight: 800;
}

.at-resource-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.at-resource-link {
    display: flex;
    align-items: center;
    min-height: 62px;
    padding: 1rem 1.15rem;
    border: 1px solid var(--at-border);
    border-radius: 0.8rem;
    background: var(--at-white);
    color: var(--at-navy);
    font-weight: 800;
    text-decoration: none;
    box-shadow: var(--at-shadow-small);
    transition: border-color 0.18s ease, color 0.18s ease,
        transform 0.18s ease;
}

.at-resource-link::after {
    margin-left: auto;
    color: var(--at-teal);
    content: "\2192";
    font-size: 1.25rem;
}

.at-resource-link:hover {
    border-color: var(--at-teal);
    color: var(--at-teal-dark);
    text-decoration: none;
    transform: translateY(-2px);
}

/* ANIMATIONS */
@keyframes at-pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.18);
    }
}

@keyframes at-star-pop {
    0% {
        opacity: 0;
        transform: scale(0.5) rotate(-20deg);
    }
    70% {
        transform: scale(1.12) rotate(6deg);
    }
    100% {
        opacity: 1;
        transform: scale(1) rotate(0);
    }
}

/* RESPONSIVE */
@media (max-width: 1050px) {
    .at-letter-buttons {
        grid-template-columns: repeat(9, minmax(42px, 1fr));
    }

    .at-tracing-layout {
        grid-template-columns: 190px minmax(0, 1fr);
    }
}

@media (max-width: 820px) {
    .at-section,
    .at-info-section,
    .at-tips-section,
    .at-resources-section {
        padding: 3.5rem 1.15rem;
    }

    .at-toolbar {
        align-items: stretch;
        flex-direction: column;
        gap: 1.25rem;
    }

    .at-select {
        width: 100%;
    }

    .at-tracing-layout {
        grid-template-columns: 1fr;
    }

    .at-letter-info {
        display: grid;
        grid-template-columns: auto 1fr auto;
        align-items: center;
        gap: 1rem;
        min-height: 0;
        text-align: left;
    }

    .at-letter-info-label {
        grid-column: 1 / -1;
    }

    .at-current-letter {
        margin: 0;
        font-size: 5rem;
    }

    .at-letter-info p {
        margin: 0;
    }

    .at-example-grid,
    .at-tips-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 620px) {
    .at-letter-buttons {
        grid-template-columns: repeat(6, minmax(40px, 1fr));
    }

    .at-card-top {
        align-items: stretch;
        flex-direction: column;
    }

    .at-icon-button {
        width: 100%;
    }

    .at-tracing-layout {
        padding: 1rem;
    }

    .at-feedback {
        margin: 0 1rem;
    }

    .at-action-row {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        padding: 1rem;
    }

    .at-secondary-button,
    .at-primary-button {
        width: 100%;
    }

    .at-resource-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 430px) {
    .at-section,
    .at-info-section,
    .at-tips-section,
    .at-resources-section {
        padding-right: 0.85rem;
        padding-left: 0.85rem;
    }

    .at-letter-selector {
        padding: 0.85rem;
    }

    .at-letter-buttons {
        grid-template-columns: repeat(5, minmax(40px, 1fr));
        gap: 0.45rem;
    }

    .at-letter-info {
        grid-template-columns: auto 1fr;
    }

    .at-example-icon {
        display: none;
    }

    .at-action-row {
        grid-template-columns: 1fr;
    }

    .at-canvas-heading {
        align-items: flex-start;
        flex-direction: column;
        gap: 0.45rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .at-practice-page *,
    .at-practice-page *::before,
    .at-practice-page *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (forced-colors: active) {
    .at-letter-button.is-active,
    .at-primary-button,
    .at-tip-card > span {
        border: 2px solid ButtonText;
    }
}

.at-tracing-stage.is-showing-hint {
    border-color: var(--at-teal);
    box-shadow:
        0 0 0 5px rgba(21, 154, 156, 0.13),
        inset 0 0 24px rgba(22, 50, 79, 0.035);
}

/* =========================================================
   RAINBOW THEME
   ========================================================= */

.at-practice-page.at-theme-rainbow {
    --at-navy: #49326b;
    --at-navy-dark: #35234f;

    --at-teal: #7c3aed;
    --at-teal-dark: #6427c7;
    --at-teal-soft: #f3efff;

    --at-green: #17a673;
    --at-green-soft: #e9f9f2;

    --at-blue: #3182ce;
    --at-blue-soft: #ebf8ff;

    --at-border: #ddd4ee;
    --at-border-light: #eee8f7;

    --at-shadow:
        0 12px 34px rgba(73, 50, 107, 0.12);

    --at-shadow-small:
        0 5px 18px rgba(73, 50, 107, 0.10);
}


/* Rainbow practice background */

.at-practice-page.at-theme-rainbow .at-section {
    background:
        radial-gradient(
            circle at 10% 20%,
            rgba(255, 99, 132, 0.11),
            transparent 25%
        ),
        radial-gradient(
            circle at 90% 18%,
            rgba(255, 193, 7, 0.13),
            transparent 24%
        ),
        radial-gradient(
            circle at 15% 85%,
            rgba(49, 130, 206, 0.11),
            transparent 25%
        ),
        radial-gradient(
            circle at 88% 82%,
            rgba(124, 58, 237, 0.11),
            transparent 25%
        ),
        linear-gradient(
            180deg,
            #ffffff 0%,
            #fffafd 48%,
            #ffffff 100%
        );
}


/* Rainbow toolbar and cards */

.at-practice-page.at-theme-rainbow .at-card-top {
    background:
        linear-gradient(
            110deg,
            #fff1f4 0%,
            #fff8dc 25%,
            #edfff4 50%,
            #edf8ff 75%,
            #f5efff 100%
        );
}


.at-practice-page.at-theme-rainbow .at-letter-selector {
    border-color: #ddd4ee;

    background:
        linear-gradient(
            110deg,
            rgba(255, 241, 244, 0.8),
            rgba(255, 248, 220, 0.8),
            rgba(237, 255, 244, 0.8),
            rgba(237, 248, 255, 0.8),
            rgba(245, 239, 255, 0.8)
        );
}


/* Rainbow tracing workspace */

.at-practice-page.at-theme-rainbow .at-tracing-stage {
    border-color: #ddd4ee;

    background-color: #fffefe;

    background-image:
        radial-gradient(
            circle,
            rgba(124, 58, 237, 0.06) 1px,
            transparent 1px
        );

    box-shadow:
        inset 0 0 28px rgba(124, 58, 237, 0.05);
}


/* Rainbow current-letter panel */

.at-practice-page.at-theme-rainbow .at-letter-info {
    border-color: #e1d4f3;

    background:
        linear-gradient(
            155deg,
            #fff1f4,
            #fff8dc 32%,
            #edfff4 58%,
            #edf8ff 78%,
            #f5efff
        );
}


/* Rainbow alphabet buttons */

.at-practice-page.at-theme-rainbow
.at-letter-button:nth-child(6n + 1) {
    border-color: #f3b8c4;
    color: #c43e59;
}


.at-practice-page.at-theme-rainbow
.at-letter-button:nth-child(6n + 2) {
    border-color: #f1d28b;
    color: #a66a00;
}


.at-practice-page.at-theme-rainbow
.at-letter-button:nth-child(6n + 3) {
    border-color: #a9dfbf;
    color: #18794e;
}


.at-practice-page.at-theme-rainbow
.at-letter-button:nth-child(6n + 4) {
    border-color: #a9d5ef;
    color: #286f9f;
}


.at-practice-page.at-theme-rainbow
.at-letter-button:nth-child(6n + 5) {
    border-color: #c8b6ef;
    color: #6543a5;
}


.at-practice-page.at-theme-rainbow
.at-letter-button:nth-child(6n) {
    border-color: #e4b7df;
    color: #a33f92;
}


.at-practice-page.at-theme-rainbow
.at-letter-button.is-active,
.at-practice-page.at-theme-rainbow
.at-letter-button[aria-pressed="true"] {
    border-color: transparent;

    background:
        linear-gradient(
            135deg,
            #ef476f,
            #f59e0b,
            #18a66f,
            #3182ce,
            #7c3aed
        );

    color: #ffffff;

    box-shadow:
        0 6px 16px rgba(124, 58, 237, 0.25);
}


/* Rainbow progress */

.at-practice-page.at-theme-rainbow .at-progress-bar {
    background:
        linear-gradient(
            90deg,
            #ef476f 0%,
            #f59e0b 22%,
            #22a96f 43%,
            #3182ce 64%,
            #7c3aed 82%,
            #d946a8 100%
        );
}


/* Rainbow primary controls */

.at-practice-page.at-theme-rainbow .at-primary-button {
    border-color: transparent;

    background:
        linear-gradient(
            135deg,
            #7c3aed,
            #3182ce
        );

    box-shadow:
        0 6px 16px rgba(124, 58, 237, 0.24);
}


.at-practice-page.at-theme-rainbow .at-primary-button:hover {
    border-color: transparent;

    background:
        linear-gradient(
            135deg,
            #6830c9,
            #286fa9
        );
}


/* Rainbow completed feedback */

.at-practice-page.at-theme-rainbow .at-feedback-success {
    border-color: #d6c4ef;

    background:
        linear-gradient(
            90deg,
            #fff0f4,
            #fff8dc,
            #ecfff4,
            #edf8ff,
            #f5efff
        );

    color: #49326b;
}

/* =========================================================
   DARKER RAINBOW THEME OVERRIDES
   ========================================================= */

.at-practice-page.at-theme-rainbow {
    --at-navy: #352052;
    --at-navy-dark: #25143d;

    --at-teal: #6d28d9;
    --at-teal-dark: #531caf;
    --at-teal-soft: #e9ddff;

    --at-blue: #1565a8;
    --at-blue-soft: #dcefff;

    --at-green: #087a4f;
    --at-green-soft: #d9f4e7;

    --at-border: #bfaedc;
    --at-border-light: #d8cceb;
}


/* Stronger page background colors */

.at-practice-page.at-theme-rainbow .at-section {
    background:
        radial-gradient(
            circle at 8% 18%,
            rgba(225, 29, 72, 0.22),
            transparent 30%
        ),
        radial-gradient(
            circle at 90% 16%,
            rgba(234, 140, 0, 0.24),
            transparent 29%
        ),
        radial-gradient(
            circle at 12% 86%,
            rgba(3, 105, 161, 0.22),
            transparent 30%
        ),
        radial-gradient(
            circle at 90% 82%,
            rgba(109, 40, 217, 0.24),
            transparent 31%
        ),
        linear-gradient(
            180deg,
            #fff8fb 0%,
            #fff9e8 25%,
            #eefcf5 50%,
            #edf7ff 75%,
            #f6efff 100%
        );
}


/* Stronger toolbar rainbow */

.at-practice-page.at-theme-rainbow .at-card-top {
    border-bottom-color: #cbbce2;

    background:
        linear-gradient(
            110deg,
            #ffd9e2 0%,
            #fff0b8 24%,
            #cdf5df 48%,
            #cfeaff 72%,
            #e5d5ff 100%
        );
}


/* Stronger letter selector */

.at-practice-page.at-theme-rainbow .at-letter-selector {
    border-color: #bda9dc;

    background:
        linear-gradient(
            110deg,
            #ffe0e7 0%,
            #fff1be 24%,
            #d4f7e3 48%,
            #d6edff 72%,
            #e7d9ff 100%
        );
}


/* Stronger current-letter panel */

.at-practice-page.at-theme-rainbow .at-letter-info {
    border-color: #bca7da;

    background:
        linear-gradient(
            160deg,
            #ffdce5 0%,
            #fff0bd 27%,
            #d2f6e2 53%,
            #d1eaff 77%,
            #e5d5ff 100%
        );
}


/* Darker letter and icon */

.at-practice-page.at-theme-rainbow .at-current-letter {
    color: #43235f;
}


.at-practice-page.at-theme-rainbow .at-letter-info-label,
.at-practice-page.at-theme-rainbow .at-example-icon {
    color: #6520c9;
}


/* Stronger tracing-stage border */

.at-practice-page.at-theme-rainbow .at-tracing-stage {
    border-color: #bba4df;

    background-color: #fffaff;

    background-image:
        radial-gradient(
            circle,
            rgba(91, 33, 182, 0.13) 1px,
            transparent 1px
        );

    box-shadow:
        inset 0 0 32px rgba(91, 33, 182, 0.09);
}


/* Darker active alphabet button */

.at-practice-page.at-theme-rainbow
.at-letter-button.is-active,
.at-practice-page.at-theme-rainbow
.at-letter-button[aria-pressed="true"] {
    background:
        linear-gradient(
            135deg,
            #d7194b 0%,
            #dc7900 23%,
            #087a4f 45%,
            #1469aa 67%,
            #6520c9 84%,
            #b51b85 100%
        );

    box-shadow:
        0 7px 18px rgba(78, 29, 139, 0.34);
}


/* Darker rainbow progress bar */

.at-practice-page.at-theme-rainbow .at-progress-bar {
    background:
        linear-gradient(
            90deg,
            #d7194b 0%,
            #dc7900 22%,
            #087a4f 43%,
            #1469aa 64%,
            #6520c9 82%,
            #b51b85 100%
        );
}


/* Darker main action */

.at-practice-page.at-theme-rainbow .at-primary-button {
    background:
        linear-gradient(
            135deg,
            #6520c9,
            #1469aa
        );

    box-shadow:
        0 7px 18px rgba(78, 29, 139, 0.34);
}


.at-practice-page.at-theme-rainbow .at-primary-button:hover {
    background:
        linear-gradient(
            135deg,
            #50169f,
            #0d568d
        );
}


/* Stronger success feedback */

.at-practice-page.at-theme-rainbow .at-feedback-success {
    border-color: #b7a1d7;

    background:
        linear-gradient(
            90deg,
            #ffdce5,
            #fff0bd,
            #d2f6e2,
            #d1eaff,
            #e5d5ff
        );

    color: #352052;
}

/* Child-friendly lowercase letter shape */

.at-current-letter.is-handwriting-letter {
    font-family:
        "Comic Neue",
        "Comic Sans MS",
        cursive;

    font-weight: 700;
}

.at-tracing-stage.is-showing-hint canvas,
.is-showing-hint #tracingCanvas {
    animation: at-help-pulse 0.7s ease-in-out 3;
}

@keyframes at-help-pulse {
    0%,
    100% {
        filter: none;
        transform: scale(1);
    }

    50% {
        filter:
            brightness(1.08)
            drop-shadow(0 0 10px rgba(20, 158, 163, 0.38));
        transform: scale(1.008);
    }
}

@media (prefers-reduced-motion: reduce) {
    .at-tracing-stage.is-showing-hint canvas,
    .is-showing-hint #tracingCanvas {
        animation: at-help-flash 0.8s ease-in-out 2;
    }

    @keyframes at-help-flash {
        50% {
            filter: brightness(1.12);
        }
    }
}