:root {
    --bg-gradient: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    --card-bg: rgba(255, 255, 255, 0.85);
    --primary: #5c6ac4;
    --primary-hover: #4b5ab0;
    --secondary: #f490a6;
    --secondary-hover: #e0728c;
    --success: #4cd964;
    --success-hover: #3bc553;
    --danger: #ff3b30;
    --text-main: #2d3748;
    --text-muted: #718096;
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

body {
    background: var(--bg-gradient);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-main);
    overflow: hidden;
}

.app-container {
    width: 100%;
    max-width: 600px;
    height: 100vh;
    max-height: 900px;
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

@media (min-width: 600px) {
    .app-container {
        height: 90vh;
        border-radius: 40px;
        border: 4px solid rgba(255, 255, 255, 0.6);
    }
}

.view {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 24px;
    transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    opacity: 0;
    pointer-events: none;
    transform: scale(0.95);
}

.active-view {
    opacity: 1;
    pointer-events: all;
    transform: scale(1);
    z-index: 10;
}

/* --- Main Menu --- */
#main-menu {
    justify-content: center;
    align-items: center;
    text-align: center;
}

.logo-text {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 8px;
    text-shadow: 2px 2px 0px rgba(255, 255, 255, 0.8);
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.mode-selector {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 30px;
}

.mode-btn input {
    display: none;
}

.mode-text {
    padding: 10px 24px;
    background: white;
    border-radius: 20px;
    border: 2px solid transparent;
    color: var(--text-muted);
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    transition: 0.2s;
    display: inline-block;
}

.mode-btn input:checked+.mode-text {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: 0 6px 15px rgba(92, 106, 196, 0.3);
}

.level-cards {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
    max-width: 320px;
}

.menu-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    background: white;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.menu-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.4) 0%, rgba(255, 255, 255, 0) 100%);
    z-index: 1;
}

.menu-btn:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 15px 25px rgba(0, 0, 0, 0.1);
}

.menu-btn:active {
    transform: scale(0.95);
}

.english-btn {
    border: 4px solid var(--primary);
}

.spanish-btn {
    border: 4px solid var(--secondary);
}

.menu-btn .icon {
    font-size: 3rem;
    margin-bottom: 12px;
    z-index: 2;
}

.menu-btn .title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    z-index: 2;
    margin-bottom: 4px;
}

.menu-btn .date {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 600;
    z-index: 2;
}


/* --- Game View --- */
.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.icon-btn {
    background: white;
    border: none;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    box-shadow: var(--shadow);
    color: var(--text-main);
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: 0.2s;
}

.icon-btn:hover {
    transform: scale(1.1);
}

.icon-btn:active {
    transform: scale(0.9);
}

.progress-container {
    flex: 1;
    margin: 0 16px;
    display: flex;
    align-items: center;
    flex-direction: column;
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
    margin-bottom: 4px;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: var(--progress, 0%);
    background: linear-gradient(90deg, var(--secondary), var(--primary));
    transition: width 0.4s ease;
    border-radius: 10px;
}

.progress-text {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.stars-counter {
    background: #ffeb3b;
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 800;
    color: #f57f17;
    box-shadow: 0 4px 10px rgba(255, 235, 59, 0.4);
    display: flex;
    align-items: center;
    gap: 6px;
}

.game-board {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.image-container {
    width: 100%;
    max-width: 280px;
    aspect-ratio: 1;
    position: relative;
    margin-bottom: 30px;
    border-radius: var(--radius-lg);
    background: white;
    padding: 16px;
    box-shadow: var(--shadow);
    border: 4px solid white;
}

#word-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--radius-md);
    animation: float 4s ease-in-out infinite;
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-10px);
    }

    100% {
        transform: translateY(0px);
    }
}

.sound-btn {
    position: absolute;
    bottom: -20px;
    right: -10px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    border: 4px solid white;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 8px 15px rgba(92, 106, 196, 0.3);
    display: flex;
    justify-content: center;
    align-items: center;
    transition: 0.2s;
}

.sound-btn:hover {
    transform: scale(1.1);
    background: var(--primary-hover);
}

.sound-btn.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(92, 106, 196, 0.7);
    }

    70% {
        box-shadow: 0 0 0 15px rgba(92, 106, 196, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(92, 106, 196, 0);
    }
}

.interaction-area {
    width: 100%;
    margin-bottom: auto;
}

.answer-slots {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 30px;
    min-height: 56px;
}

.slot {
    width: 50px;
    height: 56px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.5);
    border: 2px dashed #cbd5e0;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-main);
    text-transform: uppercase;
    transition: 0.2s;
}

.letter-bank {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.letter-tile {
    width: 50px;
    height: 56px;
    border-radius: var(--radius-sm);
    background: white;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary);
    text-transform: uppercase;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-bottom: 4px solid #cbd5e0;
    transition: transform 0.1s, box-shadow 0.1s, opacity 0.3s;
}

.letter-tile:active {
    transform: translateY(4px);
    border-bottom-width: 0px;
    box-shadow: 0 0px 4px rgba(0, 0, 0, 0.1);
}

.letter-tile.used {
    opacity: 0;
    pointer-events: none;
    transform: scale(0.5);
}

.slot.filled {
    background: white;
    border: none;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
    border-bottom: 4px solid var(--primary);
    color: var(--primary);
    cursor: pointer;
}

.slot.filled:active {
    transform: translateY(4px);
    border-bottom-width: 0;
}


/* Validation Animations */
.shake {
    animation: shake 0.5s cubic-bezier(.36, .07, .19, .97) both;
}

.slot.shake.filled {
    border-bottom-color: var(--danger);
    color: var(--danger);
}

@keyframes shake {

    10%,
    90% {
        transform: translate3d(-1px, 0, 0);
    }

    20%,
    80% {
        transform: translate3d(2px, 0, 0);
    }

    30%,
    50%,
    70% {
        transform: translate3d(-4px, 0, 0);
    }

    40%,
    60% {
        transform: translate3d(4px, 0, 0);
    }
}

.success {
    animation: successPop 0.5s ease both;
}

.slot.success.filled {
    border-bottom-color: var(--success);
    color: var(--success);
}

@keyframes successPop {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.2);
    }

    100% {
        transform: scale(1);
    }
}

.action-buttons {
    width: 100%;
    display: flex;
    justify-content: center;
    padding-bottom: 20px;
}

.action-btn {
    width: 80%;
    max-width: 300px;
    padding: 16px;
    border-radius: 30px;
    border: none;
    background: var(--success);
    color: white;
    font-size: 1.4rem;
    font-weight: 800;
    box-shadow: 0 8px 15px rgba(76, 217, 100, 0.3);
    border-bottom: 6px solid #2da641;
    cursor: pointer;
    transition: 0.2s;
    opacity: 0.5;
    pointer-events: none;
}

.action-btn.active {
    opacity: 1;
    pointer-events: all;
}

.action-btn.active:hover {
    transform: translateY(-2px);
    background: var(--success-hover);
}

.action-btn.active:active {
    transform: translateY(6px);
    border-bottom-width: 0;
}


/* --- Score View --- */
#score-view {
    justify-content: center;
    align-items: center;
    text-align: center;
}

.congrats-text {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.final-score-display {
    font-size: 5rem;
    font-weight: 800;
    color: #f57f17;
    margin-bottom: 50px;
    text-shadow: 2px 2px 10px rgba(245, 127, 23, 0.3);
}

#score-view .action-btn {
    opacity: 1;
    pointer-events: all;
    background: var(--primary);
    border-bottom-color: #3f4a9b;
    box-shadow: 0 8px 15px rgba(92, 106, 196, 0.3);
}

#confetti-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 100;
}
/* --- Modal & Branding --- */
.branding-footer {
    position: absolute;
    bottom: 10px;
    width: 100%;
    text-align: center;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    opacity: 0.7;
    pointer-events: none;
    z-index: 5;
}

.modal {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 50;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: white;
    width: 90%;
    max-width: 400px;
    padding: 30px;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    transform: translateY(20px);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-content h2 {
    color: var(--primary);
    margin-bottom: 8px;
}

.modal-content p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-main);
}

.form-group input, .form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-sm);
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus, .form-group select:focus {
    border-color: var(--primary);
}

.modal-actions {
    display: flex;
    gap: 12px;
    margin-top: 30px;
}

.modal-actions button {
    flex: 1;
    padding: 12px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: 0.2s;
}

.cancel-btn {
    background: #edf2f7;
    color: var(--text-muted);
}
.cancel-btn:hover { background: #e2e8f0; }

.start-btn {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 10px rgba(92, 106, 196, 0.3);
}
.start-btn:hover { background: var(--primary-hover); transform: translateY(-2px); }