:root {
    --bg-color: #242933;
    --card-bg: #2E3440;
    --text-primary: #ECEFF4;
    --text-secondary: #D8DEE9;
    --accent-primary: #88C0D0;
    --accent-secondary: #81A1C1;
    --accent-success: #A3BE8C;
    --accent-error: #BF616A;

    --font-main: 'Outfit', sans-serif;
    --font-mono: 'Space Mono', monospace;

    --input-bg: #3B4252;
    --input-border: #4C566A;
    --input-focus: var(--accent-primary);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-x: hidden;
}

.app-container {
    width: 100%;
    max-width: 1200px;
    /* Increased max-width for sidebar */
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

h1 {
    font-weight: 700;
    letter-spacing: -0.05em;
    font-size: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.1em;
}

.logo-x {
    width: 0.9em;
    height: 0.9em;
    stroke: currentColor;
    stroke-width: 8;
    stroke-linecap: round;
    fill: none;
    margin-right: -0.1em;
}

.home-link {
    text-decoration: none;
    color: inherit;
    transition: opacity 0.2s;
    display: flex;
    align-items: center;
}

.home-link:hover {
    opacity: 0.8;
}

.highlight {
    color: var(--accent-primary);
    text-shadow: 0 0 10px rgba(136, 192, 208, 0.2);
}

.btn {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-family: var(--font-main);
    font-weight: 600;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn.primary {
    background-color: var(--accent-primary);
    color: #2E3440;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.btn.primary:hover {
    background-color: #81A1C1;
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}

.btn.secondary {
    background-color: transparent;
    border: 1px solid var(--input-border);
    color: var(--text-secondary);
    margin-left: 1rem;
}

.btn.secondary:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

.loading-state {
    width: 100%;
    text-align: center;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        opacity: 0.5;
    }

    50% {
        opacity: 1;
    }

    100% {
        opacity: 0.5;
    }
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(13, 13, 18, 0.9);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid var(--input-border);
    width: 90%;
    max-width: 400px;
    text-align: center;
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transform: scale(1);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.hidden .modal-content {
    transform: scale(0.9);
}

.close-btn {
    position: absolute;
    top: 10px;
    right: 15px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    transition: color 0.2s;
    line-height: 1;
}

.close-btn:hover {
    color: var(--text-primary);
}

.modal-content h2 {
    color: var(--accent-success);
    margin-bottom: 0.5rem;
    font-size: 1.8rem;
}

.modal-content p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 0.9rem;
}

.stat-box {
    background: rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.stat-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.full-width {
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
}

/* Timer Styles */
.timer {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    color: var(--accent-primary);
    background: rgba(136, 192, 208, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    border: 1px solid rgba(136, 192, 208, 0.2);
    margin-right: auto;
    margin-left: 2rem;
}

/* Sidebar Layout */
.game-content {
    display: flex;
    gap: 2rem;
    width: 100%;
}

.game-board {
    flex: 3;
    display: flex;
    flex-wrap: wrap;
    align-content: flex-start;
}

.sidebar {
    flex: 1;
    min-width: 250px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.panel {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.panel h3 {
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    letter-spacing: 0.1em;
}

/* Toggles */
.toggle-control {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.8rem;
    font-size: 0.9rem;
}

input[type="checkbox"] {
    accent-color: var(--accent-primary);
    width: 1rem;
    height: 1rem;
    cursor: pointer;
}

/* Frequency Chart */
.freq-chart {
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 5px;

    /* Custom Scrollbar */
    scrollbar-width: thin;
    scrollbar-color: var(--accent-primary) rgba(0, 0, 0, 0.2);
}

.freq-chart::-webkit-scrollbar {
    width: 6px;
}

.freq-chart::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

.freq-chart::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 3px;
    box-shadow: 0 0 5px var(--accent-primary);
}

.freq-chart::-webkit-scrollbar-thumb:hover {
    background: #4df8ff;
}

.freq-row {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.8rem;
    font-family: var(--font-mono);
}

.freq-letter {
    width: 15px;
    color: var(--text-secondary);
}

.freq-bar-container {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
}

.freq-bar {
    height: 100%;
    background: var(--accent-secondary);
    width: 0%;
    transition: width 0.5s ease;
}

.freq-count {
    width: 20px;
    text-align: right;
    color: var(--text-primary);
}

/* Game Board Specifics (Restored) */
.word {
    display: flex;
    gap: 4px;
    /* Space between letters */
    margin-right: 1.5rem;
    /* Space between words */
    margin-bottom: 2rem;
}

.letter-column {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.cipher-letter {
    font-family: var(--font-mono);
    color: var(--text-secondary);
    font-size: 1.2rem;
    font-weight: 700;
    text-transform: uppercase;
    user-select: none;
}

.input-letter {
    width: 40px;
    height: 50px;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    text-transform: uppercase;
    outline: none;
    transition: all 0.2s ease;
    cursor: pointer;
    caret-color: transparent;
}

.input-letter:focus {
    border-color: var(--accent-primary);
    border-width: 2px;
    background-color: #434C5E;
    box-shadow: 0 0 0 4px rgba(136, 192, 208, 0.1);
    outline: none;
    transform: scale(1.05);
    z-index: 10;
}

.input-letter.matched {
    border-color: var(--accent-success) !important;
    color: var(--accent-success);
}

.input-letter.incorrect {
    border-color: var(--accent-error);
    animation: shake 0.4s ease;
}

.input-letter.active-same-letter {
    background-color: #3b3b4f;
    border-color: #565676;
}

/* Status Message */
.status-message {
    padding: 1rem 2rem;
    border-radius: 6px;
    background: rgba(163, 190, 140, 0.1);
    border: 1px solid var(--accent-success);
    color: var(--accent-success);
    font-weight: bold;
    text-align: center;
    margin-top: 1rem;
    animation: slideUp 0.3s ease;
}

.status-message.hidden {
    display: none;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Shake Animation Utility */
.shake {
    animation: shake 0.4s ease;
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-5px);
    }

    75% {
        transform: translateX(5px);
    }
}

/* Responsiveness */
@media (max-width: 768px) {
    .game-content {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
    }

    .input-letter {
        width: 30px;
        height: 40px;
        font-size: 1.2rem;
    }

    h1 {
        font-size: 1.8rem;
    }
}

/* Sidebar Inputs */
.control-group {
    margin-bottom: 1.5rem;
}

.control-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.full-width-select {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: 4px;
    font-family: var(--font-main);
    cursor: pointer;
    outline: none;
}

.full-width-select:focus {
    border-color: var(--accent-primary);
}

/* Footer */
.app-footer {
    width: 100%;
    text-align: center;
    padding: 2rem;
    margin-top: auto;
    /* Pushes to bottom if flex container allows */
    color: var(--text-secondary);
    font-size: 0.8rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.app-footer a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: opacity 0.2s;
}

.app-footer a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* Dropdown Menu */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    background-color: var(--card-bg);
    min-width: 160px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--input-border);
    border-radius: 6px;
    z-index: 1000;
}

.dropdown-content a {
    color: var(--text-primary);
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    font-family: var(--font-main);
    text-align: left;
}

.dropdown-content a:hover {
    background-color: var(--input-bg);
    color: var(--accent-primary);
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown-btn {
    background: var(--card-bg);
    color: var(--text-secondary);
    border: 1px solid var(--input-border);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-family: var(--font-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.dropdown-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}