/**
 * Alphabet Learning App Styles
 * Kid-friendly design for ages 4-6
 */

/* ========================================
   CSS Custom Properties (Kid-friendly palette)
   ======================================== */

:root {
    --al-primary: #dc2626; /* Darker red for better contrast - 4.63:1 with white */
    --al-primary-hover: #b91c1c;
    --al-primary-text: #b91c1c; /* Even darker for text on light backgrounds */
    --al-secondary: #0d9488; /* Darker teal for better contrast */
    --al-secondary-hover: #0f766e;
    --al-accent: #d97706; /* Darker amber for better contrast */
    --al-accent-hover: #b45309;
    --al-success: #15803d; /* Darker green for better contrast */
    --al-success-light: #86efac;
    --al-error: #dc2626;
    --al-error-light: #FFCDD2;

    --al-purple: #7c3aed; /* Darker purple for better contrast - 4.5:1 with white */
    --al-orange: #ea580c; /* Darker orange for better contrast */
    --al-pink: #db2777; /* Darker pink for better contrast */
    --al-blue: #2563eb; /* Darker blue for better contrast */

    --al-letter-size: clamp(4rem, 15vw, 8rem);
    --al-letter-size-small: clamp(2rem, 8vw, 3rem);
    --al-card-radius: 20px;
    --al-btn-radius: 16px;

    --al-transition: 0.3s ease;
    --al-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

[data-theme="dark"] {
    --al-primary: #f87171; /* Lighter red for dark theme - good contrast on dark */
    --al-primary-hover: #fca5a5;
    --al-primary-text: #fca5a5;
    --al-secondary: #5eead4;
    --al-accent: #fbbf24;
    --al-purple: #a78bfa;
    --al-orange: #fb923c;
    --al-pink: #f472b6;
    --al-blue: #60a5fa;
}

/* ========================================
   App Container
   ======================================== */

.al-container {
    max-width: 800px;
    margin: 0 auto;
}

.alphabet-learning {
    background: var(--color-bg-card);
    border: 3px solid var(--al-primary);
    border-radius: var(--al-card-radius);
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(255, 107, 107, 0.2);
}

/* ========================================
   Mode Tabs
   ======================================== */

.al-mode-tabs {
    display: flex;
    background: var(--color-bg-subtle);
    border-bottom: 2px solid var(--color-border);
}

.al-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4);
    border: none;
    background: transparent;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: var(--al-transition);
}

.al-tab:hover {
    background: var(--color-bg-card);
    color: var(--color-text);
}

.al-tab--active {
    background: var(--color-bg-card);
    color: var(--al-primary-text, var(--al-primary));
    border-bottom: 3px solid var(--al-primary);
    margin-bottom: -2px;
}

.al-tab-icon {
    font-size: 1.5rem;
}

/* ========================================
   Panel
   ======================================== */

.al-panel {
    padding: var(--space-4);
}

.al-panel[hidden] {
    display: none;
}

/* ========================================
   Letter Display
   ======================================== */

.al-letter-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    padding: var(--space-4);
}

.al-letter-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg, var(--al-accent), var(--al-orange));
    border-radius: var(--al-card-radius);
    padding: var(--space-6);
    min-width: 200px;
    min-height: 250px;
    box-shadow: 0 8px 24px rgba(255, 179, 71, 0.3);
    transition: transform 0.3s var(--al-bounce);
}

.al-letter-card:hover {
    transform: scale(1.02);
}

.al-letter-upper {
    font-size: var(--al-letter-size);
    font-weight: 800;
    color: var(--al-primary);
    line-height: 1;
    text-shadow: 2px 2px 0 rgba(0, 0, 0, 0.1);
}

.al-letter-lower {
    font-size: calc(var(--al-letter-size) * 0.5);
    font-weight: 600;
    color: var(--al-secondary);
    margin-top: var(--space-2);
}

.al-letter-word {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-4);
    padding: var(--space-2) var(--space-4);
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--al-btn-radius);
}

.al-word-emoji {
    font-size: 2rem;
}

.al-word-text {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
}

/* ========================================
   Navigation Buttons
   ======================================== */

.al-nav-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border: none;
    border-radius: 50%;
    background: var(--al-secondary);
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--al-transition);
    box-shadow: 0 4px 12px rgba(78, 205, 196, 0.3);
}

.al-nav-btn:hover {
    background: var(--al-secondary-hover);
    transform: scale(1.1);
}

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

.al-nav-btn:focus-visible {
    outline: 3px solid var(--al-primary);
    outline-offset: 2px;
}

[dir="rtl"] .al-nav-prev span,
[dir="rtl"] .al-nav-next span {
    transform: scaleX(-1);
    display: inline-block;
}

/* ========================================
   Sound Controls
   ======================================== */

.al-sound-controls {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-4);
}

.al-sound-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    border: none;
    border-radius: var(--al-btn-radius);
    background: var(--al-primary);
    color: white;
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: var(--al-transition);
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.3);
}

.al-sound-btn:hover {
    background: var(--al-primary-hover);
    transform: translateY(-2px);
}

.al-sound-btn--word {
    background: var(--al-purple);
}

.al-sound-btn--word:hover {
    background: #8B6CE0;
}

.al-sound-icon {
    font-size: 1.25rem;
}

/* ========================================
   Alphabet Grid
   ======================================== */

.al-grid-container {
    padding: var(--space-4);
    background: var(--color-bg-subtle);
    border-radius: var(--al-btn-radius);
    margin: var(--space-4);
}

.al-grid-title {
    font-size: var(--font-size-lg);
    text-align: center;
    margin-bottom: var(--space-3);
    color: var(--color-text-muted);
}

.al-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
    gap: var(--space-2);
    max-width: 100%;
}

.al-grid-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    font-size: var(--al-letter-size-small);
    font-weight: 700;
    color: var(--color-text);
    cursor: pointer;
    transition: var(--al-transition);
}

.al-grid-letter:hover {
    border-color: var(--al-primary);
    background: rgba(255, 107, 107, 0.1);
    transform: scale(1.05);
}

.al-grid-letter--active {
    border-color: var(--al-primary);
    background: var(--al-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.4);
}

.al-grid-letter:focus-visible {
    outline: 3px solid var(--al-secondary);
    outline-offset: 2px;
}

/* ========================================
   Games Menu
   ======================================== */

.al-game-menu-title {
    font-size: var(--font-size-xl);
    text-align: center;
    margin-bottom: var(--space-4);
    color: var(--al-primary);
}

.al-game-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}

.al-game-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-5);
    border: 3px solid var(--color-border);
    border-radius: var(--al-card-radius);
    background: var(--color-bg-card);
    cursor: pointer;
    transition: var(--al-transition);
}

.al-game-card:hover {
    border-color: var(--al-primary);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(255, 107, 107, 0.2);
}

.al-game-card:nth-child(1):hover {
    border-color: var(--al-secondary);
    box-shadow: 0 8px 24px rgba(78, 205, 196, 0.2);
}

.al-game-card:nth-child(2):hover {
    border-color: var(--al-purple);
    box-shadow: 0 8px 24px rgba(156, 124, 244, 0.2);
}

.al-game-card:nth-child(3):hover {
    border-color: var(--al-orange);
    box-shadow: 0 8px 24px rgba(255, 179, 71, 0.2);
}

.al-game-icon {
    font-size: 3rem;
}

.al-game-name {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text);
}

.al-game-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-align: center;
}

/* ========================================
   Game Area
   ======================================== */

.al-game-area[hidden] {
    display: none;
}

.al-game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-3);
    background: var(--color-bg-subtle);
    border-radius: var(--al-btn-radius);
    margin-bottom: var(--space-4);
}

.al-back-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border: none;
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    color: var(--color-text);
    font-weight: 600;
    cursor: pointer;
    transition: var(--al-transition);
}

.al-back-btn:hover {
    background: var(--color-border);
}

.al-game-score {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.al-score-value {
    color: var(--al-primary);
    font-size: var(--font-size-xl);
}

.al-score-stars {
    color: var(--al-accent);
    font-size: 1.25rem;
}

/* ========================================
   Matching Game
   ======================================== */

.al-matching-game[hidden] {
    display: none;
}

.al-matching-instruction {
    text-align: center;
    padding: var(--space-3);
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
}

.al-matching-columns {
    display: flex;
    justify-content: center;
    gap: var(--space-6);
    padding: var(--space-4);
}

.al-matching-col {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.al-matching-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    border: 3px solid var(--color-border);
    border-radius: var(--al-btn-radius);
    background: var(--color-bg-card);
    font-size: 2.5rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--al-transition);
}

.al-matching-letter:hover {
    border-color: var(--al-primary);
    transform: scale(1.05);
}

.al-matching-letter--selected {
    border-color: var(--al-secondary);
    background: rgba(78, 205, 196, 0.2);
    box-shadow: 0 0 0 4px rgba(78, 205, 196, 0.3);
}

.al-matching-letter--matched {
    border-color: var(--al-success);
    background: var(--al-success-light);
    cursor: default;
    opacity: 0.7;
}

.al-matching-letter--wrong {
    animation: shake 0.5s ease-in-out;
    border-color: var(--al-error);
    background: var(--al-error-light);
}

/* ========================================
   Find the Letter Game
   ======================================== */

.al-find-game[hidden] {
    display: none;
}

.al-find-prompt {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-4);
    font-size: var(--font-size-xl);
    color: var(--color-text);
}

.al-find-letter {
    font-size: 2rem;
    font-weight: 800;
    color: var(--al-primary);
    padding: var(--space-2) var(--space-4);
    background: var(--al-accent);
    border-radius: var(--radius-md);
}

.al-repeat-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 50%;
    background: var(--al-purple);
    color: white;
    font-size: 1.25rem;
    cursor: pointer;
    transition: var(--al-transition);
}

.al-repeat-btn:hover {
    background: #8B6CE0;
    transform: scale(1.1);
}

.al-find-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
    padding: var(--space-4);
    max-width: 400px;
    margin: 0 auto;
}

.al-find-option {
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1;
    border: 3px solid var(--color-border);
    border-radius: var(--al-card-radius);
    background: var(--color-bg-card);
    font-size: 3rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--al-transition);
}

.al-find-option:hover {
    border-color: var(--al-primary);
    transform: scale(1.05);
}

.al-find-option--correct {
    border-color: var(--al-success);
    background: var(--al-success-light);
    animation: bounce 0.5s var(--al-bounce);
}

.al-find-option--wrong {
    border-color: var(--al-error);
    background: var(--al-error-light);
    animation: shake 0.5s ease-in-out;
}

/* ========================================
   Sequence Game
   ======================================== */

.al-sequence-game[hidden] {
    display: none;
}

.al-sequence-instruction {
    text-align: center;
    padding: var(--space-3);
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
}

.al-sequence-letters {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-4);
    flex-wrap: wrap;
}

.al-sequence-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 70px;
    height: 70px;
    border: 3px solid var(--color-border);
    border-radius: var(--al-btn-radius);
    background: var(--color-bg-card);
    font-size: 2rem;
    font-weight: 700;
    cursor: grab;
    transition: var(--al-transition);
    user-select: none;
}

.al-sequence-letter:hover {
    border-color: var(--al-primary);
}

.al-sequence-letter--dragging {
    opacity: 0.5;
    cursor: grabbing;
}

.al-sequence-letter--selected {
    border-color: var(--al-secondary);
    background: rgba(78, 205, 196, 0.2);
    box-shadow: 0 0 0 4px rgba(78, 205, 196, 0.3);
}

.al-sequence-letter--correct {
    border-color: var(--al-success);
    background: var(--al-success-light);
}

.al-sequence-letter--wrong {
    border-color: var(--al-error);
    background: var(--al-error-light);
    animation: shake 0.5s ease-in-out;
}

.al-check-btn {
    display: block;
    margin: var(--space-4) auto;
    padding: var(--space-3) var(--space-6);
    border: none;
    border-radius: var(--al-btn-radius);
    background: var(--al-primary);
    color: white;
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    transition: var(--al-transition);
}

.al-check-btn:hover {
    background: var(--al-primary-hover);
    transform: translateY(-2px);
}

/* ========================================
   Game Result Overlay
   ======================================== */

.al-game-result {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.al-game-result[hidden] {
    display: none;
}

.al-result-content {
    background: var(--color-bg-card);
    border-radius: var(--al-card-radius);
    padding: var(--space-8);
    text-align: center;
    max-width: 400px;
    animation: scaleIn 0.3s var(--al-bounce);
}

.al-result-icon {
    font-size: 5rem;
    margin-bottom: var(--space-4);
}

.al-result-message {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-3);
}

.al-result-stars {
    font-size: 2.5rem;
    color: var(--al-accent);
    margin-bottom: var(--space-6);
}

.al-result-buttons {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
}

.al-btn {
    padding: var(--space-3) var(--space-5);
    border: none;
    border-radius: var(--al-btn-radius);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: var(--al-transition);
}

.al-btn--primary {
    background: var(--al-primary);
    color: white;
}

.al-btn--primary:hover {
    background: var(--al-primary-hover);
}

.al-btn--secondary {
    background: var(--color-bg-subtle);
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

.al-btn--secondary:hover {
    background: var(--color-border);
}

/* ========================================
   Animations
   ======================================== */

@keyframes bounce {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.2);
    }
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    20%, 60% {
        transform: translateX(-10px);
    }
    40%, 80% {
        transform: translateX(10px);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes confetti {
    0% {
        transform: translateY(0) rotate(0);
        opacity: 1;
    }
    100% {
        transform: translateY(-100px) rotate(720deg);
        opacity: 0;
    }
}

.al-confetti {
    position: fixed;
    pointer-events: none;
    animation: confetti 1s ease-out forwards;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
    .al-letter-display {
        flex-direction: column;
        gap: var(--space-3);
    }

    .al-letter-card {
        min-width: 160px;
        min-height: 200px;
        padding: var(--space-4);
    }

    .al-nav-btn {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }

    .al-matching-columns {
        gap: var(--space-3);
    }

    .al-matching-letter {
        width: 60px;
        height: 60px;
        font-size: 1.75rem;
    }

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

    .al-find-option {
        font-size: 2.5rem;
    }

    .al-sequence-letter {
        width: 55px;
        height: 55px;
        font-size: 1.5rem;
    }

    .al-game-cards {
        grid-template-columns: 1fr;
    }

    .al-tab {
        padding: var(--space-3);
        font-size: var(--font-size-base);
    }

    .al-tab-icon {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .al-grid {
        grid-template-columns: repeat(7, 1fr);
    }

    .al-grid-letter {
        font-size: 1.25rem;
    }

    .al-sound-controls {
        flex-direction: column;
        align-items: center;
    }

    .al-sound-btn {
        width: 100%;
        max-width: 250px;
        justify-content: center;
    }

    .al-result-content {
        margin: var(--space-4);
        padding: var(--space-6);
    }

    .al-result-buttons {
        flex-direction: column;
    }

    .al-btn {
        width: 100%;
    }
}

/* ========================================
   Help Panel (Modal)
   ======================================== */

.help-panel {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.help-panel[hidden] {
    display: none;
}

.help-content {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

.help-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    background: var(--color-bg-card);
    z-index: 1;
}

.help-header h2 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0;
}

.help-body {
    padding: var(--space-6);
}

.help-section {
    margin-bottom: var(--space-6);
}

.help-section:last-child {
    margin-bottom: 0;
}

.help-section h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: var(--color-text);
}

.help-steps,
.help-features,
.help-tips {
    padding-left: var(--space-5);
    margin: 0;
}

.help-steps li,
.help-features li,
.help-tips li {
    margin-bottom: var(--space-2);
    color: var(--color-text-muted);
    line-height: 1.6;
}

.help-steps li:last-child,
.help-features li:last-child,
.help-tips li:last-child {
    margin-bottom: 0;
}

/* ========================================
   Help Close Button
   ======================================== */

.help-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--color-text-muted);
    transition: var(--al-transition);
}

.help-close:hover {
    background: var(--color-bg-alt);
    color: var(--color-text);
}

.help-close:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

/* ========================================
   RTL Support
   ======================================== */

[dir="rtl"] .al-letter-display {
    flex-direction: row-reverse;
}

[dir="rtl"] .al-matching-columns {
    flex-direction: row-reverse;
}

[dir="rtl"] .al-back-btn {
    flex-direction: row-reverse;
}

[dir="rtl"] .al-back-btn span:first-child {
    transform: scaleX(-1);
}

[dir="rtl"] .al-game-header {
    flex-direction: row-reverse;
}

/* ========================================
   Print Styles
   ======================================== */

@media print {
    .al-sound-controls,
    .al-mode-tabs,
    .al-nav-btn,
    .al-game-menu,
    .al-game-area {
        display: none;
    }

    .al-letter-card {
        box-shadow: none;
        border: 2px solid #000;
    }
}