/* ================================================================
   Kids Science Interactive — Frontend Styles
   ================================================================ */

:root {
    --ksi-primary:   #1565c0;
    --ksi-secondary: #ff6f00;
    --ksi-green:     #2e7d32;
    --ksi-purple:    #6a1b9a;
    --ksi-teal:      #00695c;
    --ksi-radius:    16px;
    --ksi-shadow:    0 4px 20px rgba(0,0,0,.12);
    --ksi-font:      'Segoe UI', system-ui, sans-serif;
}

/* ── Shared ─────────────────────────────────────────────────────── */
[data-ksi] {
    font-family: var(--ksi-font);
    border-radius: var(--ksi-radius);
    box-shadow: var(--ksi-shadow);
    margin: 2rem 0;
    overflow: hidden;
}
.ksi-error { color: #c62828; font-style: italic; padding: .5rem 1rem; border-left: 4px solid #c62828; }

/* ── Did You Know ───────────────────────────────────────────────── */
.ksi-didyouknow {
    background: var(--ksi-dyk-bg, #e8f5e9);
    border: 3px solid rgba(0,0,0,.08);
    padding: 0;
}
.ksi-dyk-header {
    display: flex;
    align-items: center;
    gap: .75rem;
    background: rgba(0,0,0,.06);
    padding: 1rem 1.5rem;
}
.ksi-dyk-icon  { font-size: 2rem; }
.ksi-dyk-title { margin: 0; font-size: 1.25rem; font-weight: 700; }
.ksi-dyk-facts { padding: 1.5rem; min-height: 80px; }
.ksi-dyk-fact  { display: none; animation: ksiFadeIn .35s ease; }
.ksi-dyk-fact.ksi-active { display: block; }
.ksi-dyk-fact p { margin: 0; font-size: 1.05rem; line-height: 1.7; }
.ksi-dyk-nav {
    display: flex; align-items: center; justify-content: center; gap: 1rem;
    padding: .75rem 1rem;
    background: rgba(0,0,0,.05);
}
.ksi-dyk-prev, .ksi-dyk-next {
    background: #fff; border: 2px solid rgba(0,0,0,.15); border-radius: 50%;
    width: 36px; height: 36px; cursor: pointer; font-size: 1.2rem; line-height: 1;
    transition: transform .15s, background .15s;
}
.ksi-dyk-prev:hover, .ksi-dyk-next:hover { background: var(--ksi-primary); color: #fff; transform: scale(1.1); }
.ksi-dyk-counter { font-weight: 600; font-size: .9rem; opacity: .7; }

/* ── Quiz ───────────────────────────────────────────────────────── */
.ksi-quiz { background: #fff; border: 3px solid #bbdefb; }
.ksi-quiz-header {
    background: linear-gradient(135deg, #1565c0, #1976d2);
    color: #fff; padding: 1.25rem 1.5rem;
}
.ksi-quiz-header h3 { margin: 0 0 .5rem; font-size: 1.2rem; }
.ksi-quiz-icon { font-size: 1.5rem; margin-right: .5rem; }
.ksi-quiz-progress-bar { background: rgba(255,255,255,.3); border-radius: 999px; height: 8px; margin: .5rem 0 .25rem; }
.ksi-quiz-progress-fill { background: #fff; height: 100%; border-radius: 999px; transition: width .4s ease; }
.ksi-quiz-progress-text { margin: 0; font-size: .85rem; opacity: .85; }

.ksi-quiz-questions { padding: 1.5rem; }
.ksi-quiz-question { display: none; }
.ksi-quiz-question.ksi-active { display: block; animation: ksiFadeIn .3s ease; }
.ksi-quiz-q-text { font-size: 1.1rem; font-weight: 600; margin: 0 0 1rem; }

.ksi-quiz-options { display: grid; gap: .6rem; }
.ksi-quiz-option {
    display: flex; align-items: center; gap: .75rem;
    padding: .75rem 1rem; border: 2px solid #e0e0e0; border-radius: 10px;
    background: #fafafa; cursor: pointer; text-align: left;
    font-size: 1rem; transition: all .2s;
}
.ksi-quiz-option:hover { border-color: var(--ksi-primary); background: #e3f2fd; }
.ksi-quiz-option.ksi-correct  { border-color: var(--ksi-green); background: #e8f5e9; color: var(--ksi-green); }
.ksi-quiz-option.ksi-wrong    { border-color: #c62828; background: #ffebee; color: #c62828; }
.ksi-quiz-option:disabled { cursor: default; }
.ksi-opt-letter {
    display: inline-flex; align-items: center; justify-content: center;
    width: 28px; height: 28px; border-radius: 50%;
    background: var(--ksi-primary); color: #fff;
    font-weight: 700; font-size: .85rem; flex-shrink: 0;
}
.ksi-quiz-option.ksi-correct .ksi-opt-letter { background: var(--ksi-green); }
.ksi-quiz-option.ksi-wrong   .ksi-opt-letter { background: #c62828; }

.ksi-quiz-hint-wrap { margin-top: .75rem; }
.ksi-show-hint {
    background: #fff8e1; border: 1px solid #ffe082; border-radius: 8px;
    padding: .35rem .75rem; cursor: pointer; font-size: .9rem;
    transition: background .2s;
}
.ksi-show-hint:hover { background: #ffe082; }
.ksi-hint-text { margin: .5rem 0 0; font-style: italic; color: #555; font-size: .9rem; }

.ksi-quiz-next { margin-top: 1rem; }

.ksi-quiz-result { padding: 2.5rem 1.5rem; text-align: center; }
.ksi-result-emoji { font-size: 3.5rem; margin-bottom: .5rem; }
.ksi-result-title { font-size: 1.5rem; margin: 0 0 .5rem; }
.ksi-result-score { font-size: 1.2rem; font-weight: 700; color: var(--ksi-primary); }
.ksi-result-message { color: #555; margin-bottom: 1.25rem; }

/* ── Word Scramble ──────────────────────────────────────────────── */
.ksi-wordscramble { background: #fff; border: 3px solid #f3e5f5; }
.ksi-ws-header {
    background: linear-gradient(135deg, #6a1b9a, #8e24aa);
    color: #fff; padding: 1.25rem 1.5rem;
}
.ksi-ws-header h3 { margin: 0 0 .25rem; }
.ksi-ws-progress { margin: 0; font-size: .85rem; opacity: .85; }

.ksi-ws-game { padding: 1.5rem; }
.ksi-ws-scrambled-wrap {
    background: #f3e5f5; border-radius: 12px; padding: 1.25rem;
    text-align: center; margin-bottom: 1rem; min-height: 64px;
}
.ksi-ws-tiles { display: flex; flex-wrap: wrap; gap: .4rem; justify-content: center; }
.ksi-ws-tile {
    display: inline-flex; align-items: center; justify-content: center;
    width: 44px; height: 44px; border-radius: 8px;
    background: var(--ksi-purple); color: #fff;
    font-weight: 700; font-size: 1.1rem; letter-spacing: .05em;
    animation: ksiBounce .4s ease both;
    animation-delay: calc(var(--i) * .05s);
}
.ksi-ws-hint { font-size: .9rem; color: #555; margin-bottom: .75rem; min-height: 1.2em; }
.ksi-ws-input-wrap { display: flex; gap: .5rem; margin-bottom: .75rem; }
.ksi-ws-input {
    flex: 1; padding: .6rem 1rem; border: 2px solid #ce93d8; border-radius: 10px;
    font-size: 1rem; text-transform: uppercase; letter-spacing: .1em;
}
.ksi-ws-input:focus { outline: none; border-color: var(--ksi-purple); box-shadow: 0 0 0 3px #e1bee7; }
.ksi-ws-feedback { font-weight: 700; font-size: 1rem; min-height: 1.5em; text-align: center; }
.ksi-ws-feedback.ksi-correct { color: var(--ksi-green); }
.ksi-ws-feedback.ksi-wrong   { color: #c62828; }

.ksi-ws-result { padding: 2.5rem 1.5rem; text-align: center; }

/* ── Fun Facts ──────────────────────────────────────────────────── */
.ksi-funfacts { background: #fff; border: 3px solid #fff9c4; }
.ksi-ff-header {
    background: linear-gradient(135deg, #e65100, #ff8f00);
    color: #fff; padding: 1.25rem 1.5rem;
    display: flex; align-items: center; gap: .75rem;
}
.ksi-ff-header h3 { margin: 0; }
.ksi-ff-icon { font-size: 1.75rem; }

/* Carousel */
.ksi-ff-carousel { padding: 1.25rem 1.5rem; }
.ksi-ff-item { display: none; text-align: center; padding: .5rem 0; }
.ksi-ff-item.ksi-active { display: block; animation: ksiFadeIn .35s ease; }
.ksi-ff-emoji { font-size: 2.5rem; display: block; margin-bottom: .5rem; }
.ksi-ff-item p { font-size: 1.05rem; line-height: 1.7; margin: 0 0 1rem; }
.ksi-ff-nav { display: flex; align-items: center; justify-content: center; gap: 1rem; }
.ksi-ff-prev, .ksi-ff-next {
    background: #fff8e1; border: 2px solid #ffe082; border-radius: 50%;
    width: 36px; height: 36px; cursor: pointer; font-size: 1.2rem;
    transition: transform .15s;
}
.ksi-ff-prev:hover, .ksi-ff-next:hover { transform: scale(1.15); }
.ksi-ff-dots { display: flex; gap: .4rem; }
.ksi-ff-dot { width: 8px; height: 8px; background: #ffe082; border-radius: 50%; cursor: pointer; transition: background .2s, transform .2s; }
.ksi-ff-dot.ksi-active { background: #ff8f00; transform: scale(1.4); }

/* Grid */
.ksi-ff-grid { padding: 1.25rem; display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 1rem; }
.ksi-ff-card { background: #fffde7; border: 2px solid #ffe082; border-radius: 12px; padding: 1rem; text-align: center; }
.ksi-ff-card .ksi-ff-emoji { font-size: 2rem; }
.ksi-ff-card p { margin: .5rem 0 0; font-size: .9rem; line-height: 1.5; }

/* Ticker */
.ksi-ff-ticker-wrap { overflow: hidden; padding: 1rem 0; background: #fffde7; border-top: 2px solid #ffe082; }
.ksi-ff-ticker { display: flex; gap: 3rem; width: max-content; animation: ksiTicker 20s linear infinite; }
.ksi-ff-ticker-item { white-space: nowrap; font-size: 1rem; padding: .25rem .5rem; }

/* ── Poll / Vote ────────────────────────────────────────────────── */
.ksi-pollvote { background: #fff; border: 3px solid #c8e6c9; }
.ksi-poll-header {
    background: linear-gradient(135deg, #2e7d32, #43a047);
    color: #fff; padding: 1.25rem 1.5rem;
    display: flex; align-items: center; gap: .75rem;
}
.ksi-poll-header h3 { margin: 0; }
.ksi-poll-icon { font-size: 1.75rem; }
.ksi-poll-question { padding: 1rem 1.5rem 0; font-size: 1.05rem; font-weight: 600; margin: 0; }
.ksi-poll-options { padding: 1rem 1.5rem 1.5rem; display: grid; gap: .6rem; }
.ksi-poll-option {
    padding: .8rem 1.25rem; border: 2px solid #a5d6a7; border-radius: 10px;
    background: #f1f8e9; cursor: pointer; text-align: left;
    font-size: 1rem; transition: all .2s;
}
.ksi-poll-option:hover { border-color: var(--ksi-green); background: #e8f5e9; transform: translateX(4px); }

.ksi-poll-results { padding: 1rem 1.5rem 1.5rem; }
.ksi-poll-result-row { display: flex; align-items: center; gap: .75rem; margin-bottom: .75rem; }
.ksi-poll-result-label { min-width: 100px; font-size: .9rem; font-weight: 600; flex-shrink: 0; }
.ksi-poll-bar-wrap { flex: 1; background: #e8f5e9; border-radius: 999px; height: 22px; overflow: hidden; }
.ksi-poll-bar { height: 100%; background: var(--ksi-green); border-radius: 999px; transition: width .6s ease; }
.ksi-poll-pct { font-size: .9rem; font-weight: 700; color: var(--ksi-green); min-width: 40px; }
.ksi-poll-total { font-size: .8rem; color: #777; margin: .5rem 0 0; text-align: right; }

/* ── Buttons ────────────────────────────────────────────────────── */
.ksi-quiz .button,
.ksi-wordscramble .button,
.ksi-ws-result .button,
.ksi-quiz-result .button {
    display: inline-block; padding: .6rem 1.4rem; border-radius: 999px;
    border: none; cursor: pointer; font-weight: 700; font-size: .95rem;
    transition: transform .15s, filter .15s;
}
.ksi-quiz .button-primary,
.ksi-wordscramble .ksi-ws-check { background: var(--ksi-primary); color: #fff; }
.ksi-quiz-restart, .ksi-ws-restart { background: var(--ksi-secondary); color: #fff; }
.ksi-quiz-next { background: var(--ksi-green); color: #fff; }
.ksi-ws-skip { background: #f5f5f5; color: #555; border: 1px solid #ddd; }
.ksi-quiz .button:hover,
[data-ksi] .button:hover { filter: brightness(1.1); transform: scale(1.03); }

/* ── Animations ─────────────────────────────────────────────────── */
@keyframes ksiFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes ksiBounce {
    0%   { opacity: 0; transform: scale(.5) rotate(-10deg); }
    70%  { transform: scale(1.15) rotate(3deg); }
    100% { opacity: 1; transform: scale(1) rotate(0deg); }
}
@keyframes ksiTicker {
    0%   { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 600px) {
    .ksi-ws-input-wrap { flex-direction: column; }
    .ksi-ff-grid { grid-template-columns: 1fr; }
    .ksi-poll-result-label { min-width: 70px; font-size: .8rem; }
}