/* Explain: Reusable CSS components for buttons, cards, characters, and UI elements. */
/* Eyebrow label above section headings */
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--primary-color);
    background: var(--accent-soft);
    padding: 0.4rem 0.95rem;
    border-radius: 9999px;
    margin-bottom: 1rem;
}

.eyebrow::before {
    content: '';
    width: 0.45rem;
    height: 0.45rem;
    border-radius: 9999px;
    background: var(--accent-color);
}

/* Marker-style highlight behind headline words */
.text-highlight {
    background-image: linear-gradient(transparent 62%, color-mix(in srgb, var(--accent-color) 40%, transparent) 62%);
    padding: 0 0.1em;
}

/* Subtle dotted background texture */
.dot-grid {
    background-image: radial-gradient(color-mix(in srgb, var(--primary-color) 12%, transparent) 1.5px, transparent 1.5px);
    background-size: 22px 22px;
    pointer-events: none;
}

/* Soft blurred color blobs */
.blob {
    position: absolute;
    border-radius: 9999px;
    filter: blur(70px);
    pointer-events: none;
}

.blob-amber {
    background: var(--accent-color);
    opacity: 0.35;
}

.blob-navy {
    background: var(--primary-color);
    opacity: 0.18;
}

/* Card hover lift */
.card-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.card-lift:hover {
    transform: translateY(-6px);
    box-shadow: 0 22px 44px -14px color-mix(in srgb, var(--primary-color) 30%, transparent);
}

/* Header nav underline */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background: var(--accent-color);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
    transform: scaleX(1);
}

/* Gentle floating animation */
@keyframes float-y {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.float-slow {
    animation: float-y 6s ease-in-out infinite;
}

.float-delay {
    animation-delay: 1.8s;
}

/* Scroll reveal (activated by JS) */
.reveal-ready .reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-ready .reveal.is-visible {
    opacity: 1;
    transform: none;
}

/* ===== Cartoon number characters (floating digits) ===== */
.num-char {
    --char-bg: var(--primary-color);
    --char-color: var(--char-bg);
    --char-size: 5.5rem;
    --char-delay: 0ms;
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: var(--char-size);
    height: calc(var(--char-size) * 1.05);
    flex: none;
    animation: char-bob 3.8s ease-in-out infinite;
    animation-delay: var(--char-delay);
}

.num-char__body {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.num-char__digit {
    font-family: var(--font-character);
    font-weight: 800;
    font-size: var(--char-size);
    line-height: 1;
    color: var(--char-color);
    filter: drop-shadow(0 0.07em 0 color-mix(in srgb, var(--text-color) 16%, transparent));
}

.num-char__arm {
    position: absolute;
    top: 42%;
    width: calc(var(--char-size) * 0.34);
    height: calc(var(--char-size) * 0.085);
    border-radius: 9999px;
    background: var(--char-color);
}

.num-char__arm--l {
    left: calc(var(--char-size) * -0.03);
    transform: rotate(16deg);
    transform-origin: right center;
    animation: char-arm-sway-l 4.4s ease-in-out infinite;
    animation-delay: var(--char-delay);
}

.num-char__arm--r {
    right: calc(var(--char-size) * -0.03);
    transform: rotate(-16deg);
    transform-origin: left center;
    animation: char-arm-sway-r 4.4s ease-in-out infinite;
    animation-delay: var(--char-delay);
}

.num-char__leg {
    position: absolute;
    bottom: calc(var(--char-size) * -0.2);
    width: calc(var(--char-size) * 0.085);
    height: calc(var(--char-size) * 0.26);
    border-radius: 9999px;
    background: var(--char-color);
    transform-origin: 50% 0%;
}

.num-char__leg::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: calc(var(--char-size) * -0.015);
    width: 210%;
    height: calc(var(--char-size) * 0.075);
    transform: translateX(-50%);
    border-radius: 9999px;
    background: var(--char-color);
}

.num-char__leg--l { left: 30%; transform: rotate(7deg); }
.num-char__leg--r { right: 30%; transform: rotate(-7deg); }

.num-char--navy { --char-bg: var(--primary-color); }
.num-char--amber { --char-bg: var(--accent-color); }
.num-char--soft { --char-bg: var(--navy-soft); }
.num-char--deep { --char-bg: var(--navy-deep); }
.num-char--teal { --char-bg: var(--teal-color); }
.num-char--plum { --char-bg: var(--plum-color); }
.num-char--rose { --char-bg: var(--rose-color); }
.num-char--sky { --char-bg: var(--sky-color); }
.num-char--leaf { --char-bg: var(--leaf-color); }

.num-char--sm { --char-size: 3rem; }
.num-char--lg { --char-size: 6.5rem; }

.num-char:hover .num-char__arm--l {
    animation: char-wave 0.7s ease-in-out 2;
}

@keyframes char-bob {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-0.35rem); }
}

@keyframes char-arm-sway-l {
    0%, 100% { transform: rotate(16deg); }
    50% { transform: rotate(7deg); }
}

@keyframes char-arm-sway-r {
    0%, 100% { transform: rotate(-16deg); }
    50% { transform: rotate(-7deg); }
}

@keyframes char-wave {
    0%, 100% { transform: rotate(16deg); }
    50% { transform: rotate(-48deg); }
}

/* ===== Settings chips ===== */
.chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 1.15rem;
    border-radius: 9999px;
    border: 2px solid var(--border-color);
    background: var(--background-color);
    color: var(--text-color);
    font-weight: 700;
    transition: all 0.2s ease;
    cursor: pointer;
}

.chip:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.chip.is-active {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: var(--background-color);
}

.chip:focus-visible {
    outline: 3px solid var(--accent-color);
    outline-offset: 2px;
}

/* ===== Quiz answer buttons ===== */
.quiz-option {
    border: 2px solid var(--border-color);
    background: var(--background-color);
    color: var(--text-color);
    border-radius: 1rem;
    padding: 1.1rem 0.75rem;
    font-size: 1.35rem;
    font-weight: 700;
    transition: all 0.2s ease;
    cursor: pointer;
}

.quiz-option:hover:not(:disabled) {
    border-color: var(--primary-color);
    background: var(--primary-soft);
    transform: translateY(-2px);
}

.quiz-option:focus-visible {
    outline: 3px solid var(--accent-color);
    outline-offset: 2px;
}

.quiz-option:disabled {
    cursor: default;
}

.quiz-option.is-correct {
    border-color: var(--accent-color);
    background: var(--accent-soft);
    color: var(--primary-color);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-color) 30%, transparent);
}

.quiz-option.is-correct::after {
    content: ' \2713';
    color: var(--accent-hover);
}

.quiz-option.is-wrong {
    border-color: var(--border-color);
    background: var(--surface-color);
    color: var(--text-muted);
}

.quiz-option.is-wrong::after {
    content: ' \2715';
}

/* ===== Feedback line ===== */
.quiz-feedback {
    border-radius: 0.9rem;
    padding: 0.85rem 1rem;
    font-weight: 600;
}

.quiz-feedback.is-correct {
    background: var(--accent-soft);
    color: var(--accent-hover);
}

.quiz-feedback.is-wrong {
    background: var(--primary-soft);
    color: var(--primary-color);
}

/* ===== Pop-in for game pieces ===== */
@keyframes pop-in {
    0% { opacity: 0; transform: scale(0.4); }
    100% { opacity: 1; transform: scale(1); }
}

.pop {
    animation: pop-in 0.35s ease-out both;
}

@media (prefers-reduced-motion: reduce) {
    .float-slow { animation: none; }
    .reveal-ready .reveal { opacity: 1; transform: none; transition: none; }
    .card-lift:hover { transform: none; }
    .num-char,
    .num-char__arm,
    .num-char__leg,
    .num-char:hover .num-char__arm--l,
    .pop { animation: none; }
}

/* ===== Lesson finished state ===== */
.lesson-done-btn.is-finished {
    border-color: var(--accent-color) !important;
    background: var(--accent-soft) !important;
    color: var(--accent-hover) !important;
    cursor: default;
}