@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700&display=swap');

:root {
    /* Premium Palette */
    --primary: #E63946;  /* Vivid Red */
    --secondary: #2A9D8F; /* Teal/Green */
    --accent: #E9C46A;   /* Sand/Yellow */
    --dark: #264653;     /* Deep Blue/Green */
    
    /* Neutrals */
    --bg-page: #F1F5F9;
    --bg-surface: #FFFFFF;
    --text-main: #1E293B;
    --text-muted: #64748B;
    --border: #E2E8F0;
    
    /* Effects */
    --radius-lg: 24px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-card: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
    --ease-squish: cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-page);
    color: var(--text-main);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* --- Layout --- */
.container {
    width: 100%;
    max-width: 800px; /* Reduced width for better focus */
    margin: 0 auto;
    padding: 16px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.hidden {
    display: none !important;
}

/* --- Header --- */
.header {
    text-align: center;
    margin-bottom: 32px;
    padding: 24px 0;
}

.title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
    line-height: 1.2;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 500;
}

/* --- Mode Selector --- */
.mode-selector {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.mode-title {
    font-size: 1.25rem;
    color: var(--text-main);
    font-weight: 600;
}

.mode-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    width: 100%;
}

.mode-card {
    background: var(--bg-surface);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    border: 2px solid transparent;
    box-shadow: var(--shadow-soft);
    transition: all 0.3s var(--ease-squish);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.mode-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
    border-color: var(--secondary);
}

.mode-card:active {
    transform: scale(0.98);
}

.mode-icon {
    font-size: 3.5rem;
    margin-bottom: 16px;
    display: inline-block;
    transition: transform 0.3s ease;
}

.mode-card:hover .mode-icon {
    transform: scale(1.1) rotate(5deg);
}

.mode-card h3 {
    color: var(--dark);
    font-size: 1.25rem;
    margin-bottom: 8px;
}

.mode-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.4;
}

/* --- Controls & Game UI --- */
.controls {
    background: var(--bg-surface);
    padding: 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.category-select {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    border: 2px solid var(--border);
    background: var(--bg-page);
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-main);
    font-weight: 500;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748B' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 16px;
}

.difficulty-buttons {
    display: flex;
    gap: 8px;
    background: var(--bg-page);
    padding: 4px;
    border-radius: var(--radius-md);
}

.difficulty-btn {
    flex: 1;
    padding: 10px;
    border: none;
    background: transparent;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
}

.difficulty-btn.active {
    background: var(--bg-surface);
    color: var(--dark);
    box-shadow: var(--shadow-soft);
}

.new-game-btn {
    width: 100%;
    background: var(--primary);
    color: white;
    border: none;
    padding: 16px;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-weight: 600;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(230, 57, 70, 0.2);
    transition: all 0.2s ease;
}

.new-game-btn:active {
    transform: scale(0.98);
    opacity: 0.9;
}

/* --- Stats --- */
.game-stats {
    display: flex;
    justify-content: space-between;
    padding: 0 16px 24px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
}

/* --- Word Search Grid --- */
.game-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
    align-items: center;
}

.grid-container {
    width: 100%;
    /* Max width constrains it on tablet/desktop, but on mobile it fills width */
    max-width: 500px;
    aspect-ratio: 1;
    background: var(--bg-surface);
    padding: 12px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}

.word-grid {
    display: grid;
    /* Columns set by JS, but we ensure full width/height */
    width: 100%;
    height: 100%;
    gap: 2px;
    user-select: none; /* Prevent highlighting */
    touch-action: none; /* Important for custom drag handling if implemented */
}

.grid-cell {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    /* Responsive font sizing */
    font-size: clamp(12px, 4vw, 24px); 
    color: var(--text-main);
    border-radius: 4px;
    background: var(--bg-page);
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

.grid-cell.selected {
    background: var(--accent);
    color: var(--dark);
    transform: scale(0.95);
}

.grid-cell.found {
    background: var(--secondary);
    color: white;
    animation: popIn 0.3s var(--ease-squish);
}

@keyframes popIn {
    0% { transform: scale(0.5); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

/* --- Word List --- */
.word-list-container {
    width: 100%;
    background: var(--bg-surface);
    padding: 16px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}

.word-list-title {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 12px;
    text-align: center;
}

.word-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
}

.word-item {
    background: var(--bg-page);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-main);
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.word-item.found {
    background: var(--secondary);
    color: white;
    opacity: 0.7;
    text-decoration: line-through;
}

.word-points { 
    display: none; /* Hide points to clean up UI */ 
}

/* --- Wordle Replica Theme --- */
.wordle-container {
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    height: 100vh;
    background-color: white;
    font-family: 'Poppins', sans-serif;
    overflow: hidden;
}

.wordle-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    height: 65px; /* Standard header height */
    border-bottom: 1px solid #d3d6da;
    color: #1a1a1b;
}

.wordle-title {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    font-size: 2rem;
    letter-spacing: 0.5px;
    position: absolute;
    left: 0;
    right: 0;
    text-align: center;
    pointer-events: none;
    margin: 0;
}

.wordle-header-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    color: #1a1a1b;
    z-index: 10;
}

.wordle-header-btn svg {
    width: 24px;
    height: 24px;
}

.wordle-game {
    flex: 0 1 auto;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 0;
    overflow: visible;
    max-height: calc(100vh - 65px - 220px);
}

.wordle-grid {
    display: grid;
    grid-template-rows: repeat(6, 1fr);
    grid-gap: 5px;
    width: 350px;
    max-width: 100%;
    height: auto;
    max-height: calc(100vh - 65px - 240px);
    aspect-ratio: 5 / 6;
    margin-top: 10px;
    margin-bottom: 10px;
}

.wordle-row {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    grid-gap: 5px;
}

.wordle-tile {
    width: 100%;
    /* Constraint height to be equal to width */
    aspect-ratio: 1 / 1; 
    display: inline-flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    line-height: 1;
    font-weight: bold;
    vertical-align: middle;
    box-sizing: border-box;
    color: #1a1a1b;
    text-transform: uppercase;
    user-select: none;
    border: 2px solid #d3d6da;
    background-color: transparent;
}

/* Filled state (black border, pop animation) */
.wordle-tile.tile-filled {
    border-color: #878a8c;
    animation: popIn 0.1s;
}

.wordle-tile.flip {
    animation: flip 0.5s ease-in;
}

/* Result states */
.wordle-tile.tile-correct {
    background-color: #6aaa64;
    border-color: #6aaa64;
    color: white;
}

.wordle-tile.tile-present {
    background-color: #c9b458;
    border-color: #c9b458;
    color: white;
}

.wordle-tile.tile-absent {
    background-color: #787c7e;
    border-color: #787c7e;
    color: white;
}

/* Keyboard */
.wordle-keyboard {
    height: auto;
    min-height: 200px;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    padding: 0 8px 8px 8px;
    user-select: none;
    flex-shrink: 0;
}

.keyboard-row {
    display: flex;
    width: 100%;
    margin: 0 auto 8px;
    touch-action: manipulation;
}

.key {
    font-family: inherit;
    font-weight: bold;
    border: 0;
    padding: 0;
    margin: 0 6px 0 0;
    height: 52px;
    border-radius: 4px;
    cursor: pointer;
    user-select: none;
    background-color: #d3d6da;
    color: #1a1a1b;
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    text-transform: uppercase;
    font-size: 1.25rem;
    -webkit-tap-highlight-color: rgba(0,0,0,0.3);
}

.key:last-of-type {
    margin: 0;
}

.key-wide {
    flex: 1.5;
    font-size: 12px;
}

.key-correct { background-color: #6aaa64; color: white; }
.key-present { background-color: #c9b458; color: white; }
.key-absent { background-color: #787c7e; color: white; }

/* Toast Message */
.wordle-message {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: #1a1a1b;
    color: white;
    padding: 16px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    pointer-events: none;
}

.wordle-message.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.wordle-message-error {
    background: #e63946;
}

.wordle-message-success {
    background: #6aaa64;
}

.wordle-message-info {
    background: #1a1a1b;
}

/* Animations */
@keyframes popIn {
    0% { transform: scale(0.8); opacity: 0; }
    40% { transform: scale(1.1); opacity: 1; }
    100% { transform: scale(1); opacity: 1; }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-8px); }
    20%, 40%, 60%, 80% { transform: translateX(8px); }
}

.wordle-row.shake {
    animation: shake 0.5s;
}

@keyframes flip {
    0% {
        transform: rotateX(0);
        border-color: #878a8c; /* Start with filled border color */
    }
    45% {
        transform: rotateX(90deg);
        border-color: #878a8c;
    }
    55% {
        transform: rotateX(90deg);
        /* Color change happens here in JS, but keyframe ensures transform continuity */
    }
    100% {
        transform: rotateX(0);
    }
}

/* Mobile Adjustments */
@media (max-width: 640px) {
    .wordle-game {
        padding: 0 15px;
        max-height: calc(100vh - 65px - 200px);
    }

    .wordle-grid {
        width: 100%;
        max-width: 100%;
        max-height: calc(100vh - 65px - 210px);
        margin-top: 5px;
        margin-bottom: 5px;
    }

    .wordle-tile {
        font-size: 1.25rem;
    }

    .key {
        height: 48px;
        margin-right: 4px;
        font-size: 0.75rem;
    }

    .keyboard-row {
        margin-bottom: 5px;
    }

    .wordle-keyboard {
        min-height: 190px;
        padding: 0 4px 4px 4px;
    }

    .wordle-message {
        top: 70px;
        max-width: calc(100% - 32px);
        font-size: 0.9rem;
        padding: 14px 20px;
    }
}