/**
 * NihongoDoya - Vocab Memory Duel Stylesheet
 * Tactile Watery Neo-Brutalist card-flipping vocabulary memory game
 */

:root {
    --vmd-ink: #111827;
    --vmd-bg: #f8fafc;
    --vmd-card-bg: #ffffff;
    --vmd-yellow: #ffd166;
    --vmd-yellow-hover: #fecb52;
    --vmd-aqua: #06b6d4;
    --vmd-aqua-light: #ccfbf1;
    --vmd-aqua-border: #0f766e;
    --vmd-coral: #ef4444;
    --vmd-coral-light: #fee2e2;
    --vmd-coral-border: #dc2626;
    --vmd-font-jp: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
}

/* --------------------------------------------------------------------------
   Container & Global Shell
   -------------------------------------------------------------------------- */
.vmd-game-container {
    max-width: 880px;
    margin: 0 auto;
    padding: 0 16px 40px;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--vmd-ink);
}

/* Base Card */
.vmd-card {
    background: var(--vmd-card-bg);
    border: 3px solid var(--vmd-ink);
    border-radius: 12px;
    box-shadow: 4px 4px 0px var(--vmd-ink);
    padding: 28px 24px;
    margin-bottom: 24px;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

/* --------------------------------------------------------------------------
   Pre-Game Setup Card
   -------------------------------------------------------------------------- */
.vmd-setup-header {
    text-align: center;
    margin-bottom: 24px;
}

.vmd-setup-title {
    font-family: 'Outfit', sans-serif;
    font-size: 2rem;
    font-weight: 800;
    color: var(--vmd-ink);
    margin: 0 0 6px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.vmd-setup-title i {
    color: #059669;
}

.vmd-setup-subtitle {
    font-size: 1rem;
    color: #4b5563;
    margin: 0;
}

/* Personal Best Banner */
.vmd-high-score-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #fef3c7;
    border: 2px solid var(--vmd-ink);
    border-radius: 8px;
    padding: 10px 16px;
    margin-bottom: 20px;
    font-size: 0.95rem;
    font-weight: 700;
    color: #92400e;
}

.vmd-high-score-banner strong {
    font-size: 1.15rem;
    font-family: 'Outfit', sans-serif;
    color: var(--vmd-ink);
}

/* Option Groups */
.vmd-option-group {
    margin-bottom: 20px;
}

.vmd-option-label {
    display: block;
    font-size: 0.82rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #6b7280;
    margin-bottom: 8px;
}

.vmd-chips-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.vmd-chip {
    flex: 1 1 auto;
    min-width: 80px;
    background: #ffffff;
    border: 2px solid var(--vmd-ink);
    border-radius: 8px;
    box-shadow: 2px 2px 0px var(--vmd-ink);
    padding: 10px 14px;
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--vmd-ink);
    cursor: pointer;
    text-align: center;
    transition: all 0.1s ease;
    user-select: none;
}

.vmd-chip:hover:not(:disabled) {
    background: #f8fafc;
    transform: translate(-1px, -1px);
    box-shadow: 3px 3px 0px var(--vmd-ink);
}

.vmd-chip:active:not(:disabled) {
    transform: translate(2px, 2px);
    box-shadow: 0px 0px 0px var(--vmd-ink);
}

.vmd-chip.active {
    background: var(--vmd-yellow);
    border-color: var(--vmd-ink);
    transform: translate(2px, 2px);
    box-shadow: 0px 0px 0px var(--vmd-ink);
}

.vmd-chip:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* --------------------------------------------------------------------------
   In-Game HUD
   -------------------------------------------------------------------------- */
.vmd-hud {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--vmd-card-bg);
    border: 3px solid var(--vmd-ink);
    border-radius: 12px;
    box-shadow: 4px 4px 0px var(--vmd-ink);
    padding: 12px 18px;
    margin-bottom: 18px;
    flex-wrap: wrap;
    gap: 10px;
}

.vmd-hud-group {
    display: flex;
    align-items: center;
    gap: 16px;
}

.vmd-hud-item {
    display: flex;
    flex-direction: column;
}

.vmd-hud-label {
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #6b7280;
}

.vmd-hud-val {
    font-family: 'Outfit', sans-serif;
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--vmd-ink);
    line-height: 1.1;
}

/* Chain / Streak Badge */
.vmd-streak-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #fff7ed;
    border: 2px solid var(--vmd-ink);
    border-radius: 20px;
    padding: 6px 14px;
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
    font-size: 0.95rem;
    color: #c2410c;
}

.vmd-streak-badge i {
    color: #ea580c;
}

/* Timer Display */
.vmd-timer-display {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: 'Outfit', monospace;
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--vmd-ink);
    background: #f1f5f9;
    border: 2px solid var(--vmd-ink);
    border-radius: 8px;
    padding: 6px 12px;
}

.vmd-hud-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    background: #ffffff;
    border: 2px solid var(--vmd-ink);
    border-radius: 8px;
    box-shadow: 2px 2px 0px var(--vmd-ink);
    font-size: 1rem;
    color: var(--vmd-ink);
    cursor: pointer;
    transition: all 0.1s ease;
}

.vmd-hud-btn:hover {
    background: #f1f5f9;
    transform: translate(-1px, -1px);
    box-shadow: 3px 3px 0px var(--vmd-ink);
}

.vmd-hud-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 0px 0px 0px var(--vmd-ink);
}

/* --------------------------------------------------------------------------
   Memory Board & 3D Card Architecture
   -------------------------------------------------------------------------- */
.vmd-board-arena {
    position: relative;
    background: var(--vmd-card-bg);
    border: 3px solid var(--vmd-ink);
    border-radius: 12px;
    box-shadow: 4px 4px 0px var(--vmd-ink);
    padding: 24px;
    margin-bottom: 24px;
}

/* Board Grid Layouts */
.vmd-board-grid {
    display: grid;
    gap: 12px;
    width: 100%;
}

/* Easy: 12 cards (4 cols x 3 rows) */
.vmd-board-grid.grid-easy {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* Normal: 16 cards (4 cols x 4 rows) */
.vmd-board-grid.grid-normal {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* Hard: 24 cards (6 cols x 4 rows) */
.vmd-board-grid.grid-hard {
    grid-template-columns: repeat(6, minmax(0, 1fr));
}

/* Individual Card Wrapper */
.vmd-card-item {
    position: relative;
    perspective: 800px;
    aspect-ratio: 4 / 3;
    min-width: 0;
    min-height: 80px;
    cursor: pointer;
    user-select: none;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

.vmd-card-item:focus-visible .vmd-card-face {
    outline: 3px solid #0284c7;
    outline-offset: 2px;
}

/* 3D Flipper Core */
.vmd-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 10px;
}

/* Flipped State */
.vmd-card-item.is-flipped .vmd-card-inner,
.vmd-card-item.is-matched .vmd-card-inner {
    transform: rotateY(180deg);
}

/* Common Card Face */
.vmd-card-face {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border: 3px solid var(--vmd-ink);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 8px 10px;
    text-align: center;
    box-sizing: border-box;
}

/* Card Back Design */
.vmd-card-back {
    background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%);
    box-shadow: 3px 3px 0px var(--vmd-ink);
    position: relative;
    overflow: hidden;
    transition: transform 0.1s ease, box-shadow 0.1s ease;
}

.vmd-card-item:hover:not(.is-flipped):not(.is-matched) .vmd-card-back {
    transform: translate(-1px, -1px);
    box-shadow: 4px 4px 0px var(--vmd-ink);
}

/* Subtle Japanese Watermark on Back */
.vmd-card-watermark {
    position: absolute;
    font-family: var(--vmd-font-jp);
    font-size: 3.2rem;
    font-weight: 900;
    color: rgba(2, 132, 199, 0.12);
    pointer-events: none;
    line-height: 1;
    z-index: 1;
}

.vmd-card-back-icon {
    position: relative;
    z-index: 2;
    font-size: 1.4rem;
    color: #0369a1;
}

/* Card Front Design */
.vmd-card-front {
    background: #ffffff;
    transform: rotateY(180deg);
    box-shadow: 3px 3px 0px var(--vmd-ink);
    position: relative;
}

.vmd-card-type-tag {
    position: absolute;
    top: 4px;
    right: 6px;
    font-size: 0.65rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: #64748b;
}

.vmd-card-text {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--vmd-ink);
    line-height: 1.35;
    word-break: keep-all;
    overflow-wrap: break-word;
    max-width: 100%;
}

.vmd-card-text.is-japanese {
    font-family: var(--vmd-font-jp);
    font-size: 1.35rem;
    font-weight: 800;
}

.vmd-card-sub {
    font-size: 0.78rem;
    color: #64748b;
    margin-top: 2px;
}

/* Matched Card State */
.vmd-card-item.is-matched {
    cursor: default;
}

.vmd-card-item.is-matched .vmd-card-front {
    background: var(--vmd-aqua-light);
    border-color: var(--vmd-aqua-border);
    box-shadow: 1.5px 1.5px 0px var(--vmd-aqua-border);
    transform: rotateY(180deg) translate(1.5px, 1.5px);
}

.vmd-card-item.is-matched .vmd-card-text {
    color: var(--vmd-aqua-border);
}

.vmd-card-match-icon {
    display: none;
    position: absolute;
    bottom: 4px;
    right: 6px;
    color: var(--vmd-aqua-border);
    font-size: 0.82rem;
    font-weight: 900;
}

.vmd-card-item.is-matched .vmd-card-match-icon {
    display: block;
}

/* Mismatch Shake State */
.vmd-card-item.is-wrong .vmd-card-front {
    background: var(--vmd-coral-light) !important;
    border-color: var(--vmd-coral-border) !important;
    animation: vmdShake 0.4s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

@keyframes vmdShake {
    10%, 90% { transform: rotateY(180deg) translate3d(-2px, 0, 0); }
    20%, 80% { transform: rotateY(180deg) translate3d(2px, 0, 0); }
    30%, 50%, 70% { transform: rotateY(180deg) translate3d(-3px, 0, 0); }
    40%, 60% { transform: rotateY(180deg) translate3d(3px, 0, 0); }
}

/* Combo Toast */
.vmd-combo-toast {
    position: absolute;
    top: 10px;
    right: 14px;
    background: #fef08a;
    border: 2px solid var(--vmd-ink);
    border-radius: 6px;
    padding: 4px 10px;
    font-family: 'Outfit', sans-serif;
    font-size: 0.85rem;
    font-weight: 800;
    color: #854d0e;
    box-shadow: 2px 2px 0px var(--vmd-ink);
    opacity: 0;
    transform: translateY(-8px);
    transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    pointer-events: none;
    z-index: 10;
}

.vmd-combo-toast.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* --------------------------------------------------------------------------
   Overlays & Modals
   -------------------------------------------------------------------------- */
.vmd-overlay {
    position: fixed;
    inset: 0;
    background: rgba(17, 24, 39, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
    backdrop-filter: blur(3px);
}

.vmd-modal {
    background: #ffffff;
    border: 3px solid var(--vmd-ink);
    border-radius: 12px;
    box-shadow: 6px 6px 0px var(--vmd-ink);
    padding: 28px 24px;
    max-width: 440px;
    width: 100%;
    text-align: center;
    animation: vmdModalIn 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes vmdModalIn {
    0% { transform: scale(0.9); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.vmd-modal-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    margin: 0 0 10px 0;
    color: var(--vmd-ink);
}

.vmd-modal-text {
    font-size: 0.95rem;
    color: #4b5563;
    margin: 0 0 22px 0;
    line-height: 1.5;
}

.vmd-modal-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* --------------------------------------------------------------------------
   Results Screen
   -------------------------------------------------------------------------- */
.vmd-results-card {
    background: var(--vmd-card-bg);
    border: 3px solid var(--vmd-ink);
    border-radius: 12px;
    box-shadow: 4px 4px 0px var(--vmd-ink);
    padding: 32px 24px;
    margin-bottom: 24px;
    text-align: center;
}

.vmd-results-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #ecfeff;
    border: 2px solid #0891b2;
    border-radius: 20px;
    padding: 6px 16px;
    font-family: 'Outfit', sans-serif;
    font-size: 0.92rem;
    font-weight: 800;
    color: #0891b2;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

.vmd-results-title {
    font-size: 1.05rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #6b7280;
    margin: 0 0 4px 0;
}

.vmd-final-score {
    font-family: 'Outfit', sans-serif;
    font-size: 3.4rem;
    font-weight: 900;
    color: var(--vmd-ink);
    line-height: 1;
    margin-bottom: 10px;
}

.vmd-new-high-badge {
    display: inline-block;
    background: #fef08a;
    border: 2px solid var(--vmd-ink);
    border-radius: 6px;
    padding: 6px 14px;
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 800;
    color: #854d0e;
    box-shadow: 2px 2px 0px var(--vmd-ink);
    margin-bottom: 22px;
}

/* Stats Grid */
.vmd-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 24px;
}

.vmd-stat-box {
    background: #f8fafc;
    border: 2px solid var(--vmd-ink);
    border-radius: 8px;
    padding: 12px 8px;
    text-align: center;
}

.vmd-stat-box-num {
    font-family: 'Outfit', sans-serif;
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--vmd-ink);
    line-height: 1.2;
}

.vmd-stat-box-lbl {
    font-size: 0.72rem;
    font-weight: 700;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-top: 2px;
}

/* Missed / Difficult Pairs Section */
.vmd-difficult-section {
    background: #fffbeb;
    border: 2px solid var(--vmd-ink);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 24px;
    text-align: left;
}

.vmd-difficult-title {
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 800;
    color: #92400e;
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 10px;
}

.vmd-difficult-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.vmd-difficult-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #ffffff;
    border: 1.5px solid var(--vmd-ink);
    border-radius: 6px;
    padding: 6px 12px;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--vmd-ink);
}

.vmd-difficult-chip strong {
    font-family: var(--vmd-font-jp);
    font-size: 1.05rem;
    color: var(--vmd-coral-border);
}

/* Review Vocabulary Section */
.vmd-review-section {
    background: #ffffff;
    border: 2px solid var(--vmd-ink);
    border-radius: 8px;
    padding: 18px;
    margin-bottom: 24px;
    text-align: left;
}

.vmd-review-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    font-weight: 800;
    color: var(--vmd-ink);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
}

.vmd-review-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    max-height: 380px;
    overflow-y: auto;
    padding-right: 4px;
}

.vmd-review-item {
    background: #f8fafc;
    border: 1.5px solid var(--vmd-ink);
    border-radius: 6px;
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.vmd-review-jp {
    display: flex;
    align-items: baseline;
    gap: 6px;
    margin-bottom: 4px;
}

.vmd-review-word {
    font-family: var(--vmd-font-jp);
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--vmd-ink);
}

.vmd-review-reading {
    font-family: var(--vmd-font-jp);
    font-size: 0.85rem;
    font-weight: 600;
    color: #64748b;
}

.vmd-review-meaning {
    font-size: 0.88rem;
    font-weight: 600;
    color: #1e293b;
}

/* Results Actions */
.vmd-results-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

@media (min-width: 600px) {
    .vmd-results-actions {
        flex-direction: row;
        justify-content: center;
    }
    .vmd-results-actions > * {
        flex: 1;
    }
}

/* --------------------------------------------------------------------------
   Responsive Layout (Mobile 390px, 430px, Tablet 768px)
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .vmd-board-grid.grid-hard {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .vmd-game-container {
        padding: 0 10px 30px;
    }

    .vmd-card {
        padding: 18px 14px;
    }

    .vmd-setup-title {
        font-size: 1.6rem;
    }

    .vmd-board-arena {
        padding: 12px 10px;
    }

    .vmd-board-grid {
        gap: 6px;
    }

    .vmd-board-grid.grid-easy {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .vmd-board-grid.grid-normal {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .vmd-board-grid.grid-hard {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .vmd-card-item {
        min-height: 64px;
        aspect-ratio: 1 / 1;
        min-width: 0;
    }

    .vmd-card-face {
        padding: 4px 4px;
        border-width: 2.5px;
        overflow: hidden;
    }

    .vmd-card-type-tag {
        font-size: 0.58rem;
        top: 2px;
        right: 4px;
    }

    .vmd-card-text {
        font-size: 0.82rem;
        line-height: 1.15;
    }

    .vmd-card-text.is-japanese {
        font-size: 0.95rem;
    }

    .vmd-card-watermark {
        font-size: 1.8rem;
    }

    .vmd-card-back-icon {
        font-size: 0.95rem;
    }

    .vmd-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .vmd-final-score {
        font-size: 2.8rem;
    }

    .vmd-review-list {
        grid-template-columns: 1fr;
    }
}