/* ============================================
   KEPTY ENGLISH PORTAL - STYLES
   ============================================
   Mobile-first English learning portal CSS
   Organized by component/feature sections
   ============================================ */

/* ============================================
   1. CSS CUSTOM PROPERTIES (VARIABLES)
   ============================================ */
:root {
    /* Brand Colors */
    --kepty-orange: #CE4A22;
    --kepty-light-orange: #FFEDE8;
    --kepty-mid-orange: #FAC3B1;
    --kepty-green: #10b981;
    --kepty-light-green: #ecfdf5;
    
    /* Highlight Colors (Sound Changes) */
    --hl-blue: #bfdbfe;
    --hl-pink: #fbcfe8;
    --hl-green-soft: #bbf7d0;
    --hl-yellow: #fef08a;
}

/* ============================================
   2. BASE STYLES
   ============================================ */
body {
    font-family: 'Open Sans', 'Noto Sans JP', sans-serif;
    -webkit-overflow-scrolling: touch;
    background-color: #f8fafc;
}

/* Brand Color Classes */
.bg-kepty-orange {
    background-color: var(--kepty-orange) !important;
}

.text-kepty-orange {
    color: var(--kepty-orange) !important;
}


/* ============================================
   4. MODE SWITCH COMPONENT
   ============================================ */
.mode-switch-wrapper {
    padding-bottom: 16px;
    border-bottom: 1px solid #f1f5f9;
    margin-bottom: 16px;
}

.mode-switch-container {
    background-color: #f1f5f9;
    border-radius: 10px;
    padding: 2px;
    display: flex;
    position: relative;
    width: 100%;
    height: 34px;
}

.mode-switch-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 400;
    z-index: 10;
    transition: color 0.25s;
    color: #94a3b8;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.mode-switch-btn.active {
    color: var(--kepty-orange);
    font-weight: 700;
}

.mode-slider {
    position: absolute;
    top: 2px;
    left: 2px;
    height: calc(100% - 4px);
    background-color: white;
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
    z-index: 1;
}

/* ============================================
   5. CATEGORY TABS
   ============================================ */
.category-tab {
    transition: all 0.2s;
    white-space: nowrap;
    flex-shrink: 0;
    font-weight: 600;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 16px;
    min-width: 60px;
    font-size: 11px;
    border-radius: 9999px;
    border: 1px solid #f1f5f9;
    background: white;
    color: #94a3b8;
    cursor: pointer;
}

.category-tab-sm {
    height: 26px;
    padding: 0 10px;
    min-width: 44px;
    font-size: 10px;
}

.category-tab.active {
    background-color: var(--kepty-orange) !important;
    color: white !important;
    font-weight: 700;
    border-color: var(--kepty-orange);
}

/* ============================================
   6. THEME MENU / SCROLL
   ============================================ */
.theme-scroll-container {
    display: flex;
    overflow-x: auto;
    gap: 20px;
    padding: 0 4px 8px 4px;
    scrollbar-width: none;
    border-bottom: 1px solid #f1f5f9;
}

.theme-item {
    padding: 8px 0;
    border-bottom: 3px solid transparent;
    font-size: 13px;
    font-weight: 400;
    color: #94a3b8;
    cursor: pointer;
    flex-shrink: 0;
}

.theme-item.active {
    color: #1e293b;
    font-weight: 700;
    border-bottom-color: var(--kepty-orange);
}

/* ============================================
   7. CARDS
   ============================================ */

/* Base Word Card */
.word-card {
    background: white;
    border-radius: 20px;
    border: 1px solid #f1f5f9;
    position: relative;
    overflow: hidden;
    transition: all 0.3s;
    width: 100%;
    text-align: left;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
}

/* Grammar explain (spreadsheet HTML): mobile wrapping + badge + English phrase rows */
.word-card.grammar-explain-root {
    overflow-x: auto;
    overflow-y: visible;
    -webkit-overflow-scrolling: touch;
}

.grammar-explain-root {
    overflow-wrap: anywhere;
    word-break: break-word;
}

.grammar-explain-root p.flex.items-center.gap-2 {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 0.5rem;
    min-width: 0;
    word-break: normal;
    overflow-wrap: normal;
}

.grammar-explain-root p.flex.items-center.gap-2 > span:first-child {
    flex-shrink: 0;
}

.grammar-explain-root p.flex.items-center.gap-2 > span.font-bold:not(:first-child) {
    white-space: nowrap;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

/* Flip Card - Chunk (Sentence Building) */
.flip-card-chunk,
.flip-card-voc {
    perspective: 1000px;
    min-height: 70px;
    cursor: pointer;
    margin-bottom: 8px;
    width: 100%;
}

.flip-card-voc {
    min-height: 105px;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

.flipped .flip-card-inner {
    transform: rotateY(180deg);
}

.flip-card-front,
.flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 12px;
    padding: 12px 20px 12px 32px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: left;
}

.flip-card-front {
    background: white;
    border: 1px solid #f1f5f9;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.flip-card-back {
    background: var(--kepty-light-green);
    border: 1px solid #d1fae5;
    transform: rotateY(180deg);
}

/* Kepty Card (Generic centered card) */
.kepty-card {
    background: white;
    border-radius: 40px;
    padding: 24px 24px 40px 24px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.02);
    border: 1px solid #f1f5f9;
    min-height: 240px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
    position: relative;
}

/* Card Inner Title */
.card-inner-title {
    font-size: 13px;
    font-weight: 900;
    color: var(--kepty-orange) !important;
    margin-bottom: 12px;
    text-transform: uppercase;
}

/* ============================================
   8. QUIZ COMPONENTS
   ============================================ */

/* Quiz Badge (Correct/Incorrect Indicator) */
.quiz-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    color: white;
    z-index: 50;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.quiz-badge.correct {
    background-color: #10b981;
    display: flex;
}

.quiz-badge.incorrect {
    background-color: #ef4444;
    display: flex;
}

/* Quiz Option Button */
.quiz-option-btn {
    position: relative;
    background: white;
    border: 2px solid #f1f5f9;
    transition: all 0.2s;
    text-align: left;
    padding: 16px;
    border-radius: 16px;
    font-weight: 700;
    font-size: 14px;
    width: 100%;
    display: block;
    -webkit-tap-highlight-color: transparent;
}

.quiz-option-btn:active {
    transform: scale(0.98) translateY(2px);
}

/* ============================================
   9. PROGRESS INDICATORS
   ============================================ */
.progress-dot {
    width: 10px;
    height: 10px;
    border-radius: 2px;
    border: 1.5px solid #e2e8f0;
    background: white;
    transition: 0.3s;
}

.progress-dot.filled {
    background: var(--kepty-orange);
    border-color: var(--kepty-orange);
}

/* ============================================
   10. FOOTER NAVIGATION
   ============================================ */
.portal-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    border-top: 1px solid #f1f5f9;
    display: flex;
    justify-content: flex-start;
    overflow-x: auto;
    padding: 12px 0;
    z-index: 100;
    box-shadow: 0 -5px 15px rgba(0, 0, 0, 0.03);
    scrollbar-width: none;
}

.footer-indicator {
    position: fixed;
    bottom: 22px;
    right: 0;
    z-index: 101;
    background: linear-gradient(to left, white 40%, transparent);
    color: var(--kepty-orange);
    width: 40px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: bounce-x 1.2s infinite;
    pointer-events: none;
}

.footer-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #94a3b8;
    cursor: pointer;
    transition: 0.2s;
    flex-shrink: 0;
    width: 75px;
}

.footer-item.active {
    color: var(--kepty-orange);
}

.footer-item span {
    font-size: 7.5px;
    font-weight: 700;
    transform: translateY(-1px);
    margin-top: 2px;
}

/* ============================================
   11. BUTTONS
   ============================================ */

/* Recording Buttons */
.exam-mic-btn {
    width: 58px;
    height: 58px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid #e2e8f0;
    color: #94a3b8;
    background: #f8fafc;
    cursor: pointer;
    position: relative;
    z-index: 20;
    transition: background 0.2s, border-color 0.2s, color 0.2s;
}

/* Topic Talk 録音状態（旧 .tt-mic-btn と同等） */
.exam-mic-btn.recording {
    background: #ef4444 !important;
    border-color: #ef4444 !important;
    color: #fff !important;
    animation: kepty-mic-pulse 1.4s ease-in-out infinite;
}

.exam-mic-btn.saving {
    background: #f97316 !important;
    border-color: #f97316 !important;
    color: #fff !important;
}

.exam-mic-btn.saved {
    background: #22c55e !important;
    border-color: #22c55e !important;
    color: #fff !important;
}

@keyframes kepty-mic-pulse {
    0%,
    100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.45);
    }
    60% {
        box-shadow: 0 0 0 14px rgba(239, 68, 68, 0);
    }
}

.record-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1.5px solid var(--kepty-orange);
    color: var(--kepty-orange);
    cursor: pointer;
    transition: 0.2s;
    -webkit-tap-highlight-color: transparent;
}

.record-btn.recording {
    background-color: var(--kepty-orange) !important;
    color: white !important;
    animation: ph-pulse 1s infinite !important;
}

/* Navigation / Action Buttons — 既定の「次へ（橙）」のみ。minimal / advance は下で個別指定 */
.nav-icon-btn:not(.next-advance-btn):not(.nav-back-minimal):active,
.next-btn-orange:active {
    transform: scale(0.92) translateY(2px) !important;
}

.next-btn-orange {
    background-color: var(--kepty-orange) !important;
    color: white !important;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 9999px;
    transition: transform 0.1s;
    cursor: pointer;
    position: relative;
    z-index: 20;
}

/* 戻る — 背景・枠・影なし */
.nav-icon-btn.nav-back-minimal {
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    color: #94a3b8 !important;
    transition: transform 0.14s ease-out;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.nav-icon-btn.nav-back-minimal .lucide {
    stroke: #94a3b8;
}

.nav-icon-btn.nav-back-minimal:active {
    transform: translateY(4px) scale(0.94) !important;
}

/* Topic Talk / Sentence Building / Speaking — advance (no ring; icon = brand orange; double chevron) */
.nav-icon-btn.next-advance-btn {
    background-color: #ffffff !important;
    color: var(--kepty-orange) !important;
    border: none !important;
    box-shadow: none !important;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 9999px;
    padding: 1.125rem !important;
    min-width: 3.75rem;
    min-height: 3.75rem;
    transition: transform 0.14s ease-out, box-shadow 0.14s ease-out;
    cursor: pointer;
    position: relative;
    z-index: 20;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.nav-icon-btn.next-advance-btn .lucide {
    stroke: var(--kepty-orange);
}

.nav-icon-btn.next-advance-btn:active {
    transform: translateY(5px) scale(0.94) !important;
}

/* Restart Link */
.restart-link {
    color: #94a3b8;
    font-size: 14px;
    font-weight: 700;
    border-bottom: 2px solid var(--kepty-orange);
    padding-bottom: 2px;
    cursor: pointer;
    transition: all 0.1s;
    display: inline-block;
}

/* ============================================
   12. SPEAKING FORM COMPONENTS
   ============================================ */
.sp-rule-box {
    background: #f1f5f9;
    border-radius: 12px;
    padding: 12px 16px;
    margin-bottom: 16px;
    text-align: left;
    border: 1px solid #e2e8f0;
}

.sp-rule-badge {
    background: #475569;
    color: white;
    font-size: 9px;
    font-weight: 900;
    padding: 2px 6px;
    border-radius: 4px;
    display: inline-block;
    margin-bottom: 8px;
}

.sp-rule-text {
    color: #1e293b;
    font-size: 13px;
    font-weight: 700;
    line-height: 1.6;
}

/* ============================================
   13. REVIEW / RESULTS
   ============================================ */
.review-item {
    text-align: left;
    padding: 12px;
    border-bottom: 1px solid #f1f5f9;
    font-size: 12px;
}

.review-item .q {
    font-weight: 900;
    color: #1e293b;
    margin-bottom: 4px;
}

.review-item .a {
    font-weight: 600;
}

/* ============================================
   14. MODAL
   ============================================ */
#detail-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 3000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-content {
    background: white;
    border-radius: 24px;
    padding: 24px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* ============================================
   15. ANIMATIONS
   ============================================ */

/* Footer Bounce Animation */
@keyframes bounce-x {
    0%, 100% {
        transform: translateX(0);
        opacity: 0.5;
    }
    50% {
        transform: translateX(-5px);
        opacity: 1;
    }
}

/* Recording Pulse Animation */
@keyframes ph-pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
        box-shadow: 0 0 0 10px rgba(206, 74, 34, 0.1);
    }
    100% {
        transform: scale(1);
    }
}

/* Voice Wave Animation */
@keyframes wave {
    0%, 100% {
        height: 5px;
    }
    50% {
        height: 25px;
    }
}

/* ============================================
   15b. EXAM NAV (戻る / 中央 / 次へ) — 左右ボタン幅が違っても中央を幾何中心に */
.exam-nav-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    column-gap: 1rem;
    width: 100%;
    box-sizing: border-box;
}

.exam-nav-cell--left {
    display: flex;
    justify-content: flex-end;
    min-width: 0;
}

.exam-nav-cell--center {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
}

.exam-nav-cell--right {
    display: flex;
    justify-content: flex-start;
    min-width: 0;
}

/* 矢印間に置く波形は行内なので上下マージンなし */
.exam-nav-cell--center .voice-wave {
    margin: 0;
}

/* ============================================
   16. VOICE WAVE COMPONENT
   ============================================ */
.voice-wave {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    height: 30px;
    margin: 20px 0;
}

.wave-bar {
    width: 3px;
    height: 5px;
    background: linear-gradient(to top, var(--kepty-orange), #FAC3B1);
    border-radius: 10px;
    animation: wave 1.2s infinite ease-in-out;
}

.wave-bar:nth-child(2) {
    animation-delay: 0.1s;
}

.wave-bar:nth-child(3) {
    animation-delay: 0.2s;
}

.wave-bar:nth-child(4) {
    animation-delay: 0.15s;
}

.wave-bar:nth-child(5) {
    animation-delay: 0.3s;
}

/* ============================================
   17. JUDGMENT / FEEDBACK LABELS
   ============================================ */
.good-label {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-weight: 900;
    font-size: 2.2rem;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s;
    z-index: 50;
    color: #16a34a;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.9);
}

.good-label.show {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.1);
}

/* ============================================
   18. UTILITY CLASSES
   ============================================ */

/* Hide Scrollbar */
.no-scrollbar::-webkit-scrollbar {
    display: none;
}

.no-scrollbar {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

:root { --kepty-premium-orange: #CE4A22; }

.menu-pill-trigger {
    position: fixed;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    box-shadow: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    z-index: 5500;
    cursor: pointer;
    transition: transform 0.2s;
    color: #CE4A22;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.04em;
    font-family: inherit;
}
.menu-pill-trigger:active { transform: scale(0.9); }

/* 画像のデザインを再現したアイコン */
.pill-icon { width: 28px; display: flex; flex-direction: column; gap: 4px; }
.pill-line { display: flex; align-items: center; gap: 3px; height: 2.5px; }
.pill-line .line { height: 2.5px; background: white; border-radius: 10px; flex-grow: 1; }
.pill-line .dot { width: 3px; height: 3px; background: white; border-radius: 50%; }
.pill-line.top .line { width: 18px; }
.pill-line.bot .line { width: 18px; order: -1; } /* ドットを右側に */

.menu-item-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px;
    border-radius: 18px;
    transition: 0.2s;
}
.menu-item-link:hover { background: #f8fafc; }
.menu-icon-box {
    width: 40px; height: 40px; border-radius: 12px;
    background: #f1f5f9; display: flex; align-items: center; justify-content: center; color: #64748b;
}
.menu-icon-box.active-bg { background: var(--kepty-premium-orange); color: white; }
#side-menu-content.open { right: 0; }