body {
    font-family: 'Arial', sans-serif;
    background-color: #121213;
    color: white;
    margin: 0;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

h1 {
    color: white;
    margin-bottom: 20px;
    font-size: 2.5em;
}

form {
    margin: 20px auto;
    max-width: 500px;
    background: #1a1a1b;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.hidden {
    display: none !important;
}

label {
    display: block;
    margin-bottom: 15px;
    font-weight: bold;
    font-size: 1.2em;
}

select, input[type="text"], input[type="submit"] {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 2px solid #565758;
    border-radius: 8px;
    box-sizing: border-box;
    font-size: 1em;
    background-color: #121213;
    color: white;
}

select:focus, input[type="text"]:focus {
    outline: none;
    border-color: #6aaa64;
}

input[type="submit"] {
    background-color: #6aaa64;
    color: white;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.3s;
}

input[type="submit"]:hover {
    background-color: #5a9a54;
}

.board {
    display: block;
    margin: 30px auto;
    padding: 20px;
    background: #1a1a1b;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    max-width: 95vw;
}

/* Default board (word length <= 10) - centered with normal sizing */
.board.normal-width {
    max-width: 700px;
}

/* Long board (word length > 10) - enable horizontal scrolling */
.board.long-word {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    max-width: 95vw;
}

.row {
    display: flex;
    justify-content: center;
    margin-bottom: 8px;
    gap: 4px;
}

/* Long word rows - fixed size cells, no shrinking */
.board.long-word .row {
    justify-content: flex-start;
    min-width: max-content;
}

.cell {
    /* Responsive sizing: shrink on small screens, cap at desktop size */
    width: clamp(40px, 12vw, 62px);
    height: clamp(40px, 12vw, 62px);
    border: 2px solid #3a3a3c;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(1.2em, 4vw, 2em);
    font-weight: bold;
    margin: 0 4px;
    border-radius: 4px;
    text-transform: uppercase;
    transition: all 0.3s ease;
    animation: pop 0.1s ease-in-out;
}

/* Make cells appear clickable on mobile */
.cell[style*="cursor: pointer"] {
    transition: all 0.2s ease;
}

.cell[style*="cursor: pointer"]:active {
    transform: scale(0.95);
    background-color: rgba(255, 255, 255, 0.1);
}

/* For long words, keep cells at fixed size (62px) */
.board.long-word .cell {
    width: 62px;
    height: 62px;
    min-width: 62px;
    min-height: 62px;
    font-size: 1.8em;
    flex-shrink: 0;
}

@keyframes pop {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

@keyframes flip {
    0% { transform: rotateX(0); }
    50% { transform: rotateX(90deg); }
    100% { transform: rotateX(0); }
}

.cell.filled {
    animation: pop 0.1s ease-in-out;
}

.cell.reveal {
    animation: flip 0.6s ease-in-out;
}

.cell.empty {
    border-color: #565758;
    background-color: transparent;
}

.cell.green {
    background-color: #6aaa64;
    border-color: #6aaa64;
    color: white;
    animation: flip 0.6s ease-in-out;
}

.cell.yellow {
    background-color: #c9b458;
    border-color: #c9b458;
    color: white;
    animation: flip 0.6s ease-in-out;
}

.cell.grey {
    background-color: #3a3a3c;
    border-color: #3a3a3c;
    color: white;
    animation: flip 0.6s ease-in-out;
}

.solve-result {
    margin: 20px auto;
    max-width: 500px;
    background: #1a1a1b;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    text-align: center;
}

.solve-result h2 {
    color: #6aaa64;
    margin-bottom: 10px;
}

.solve-result p {
    font-size: 1.1em;
    margin: 5px 0;
}

.word-list {
    margin: 20px auto;
    max-width: 500px;
    background: #1a1a1b;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.word-list select {
    width: 100%;
    padding: 12px;
    border: 2px solid #565758;
    border-radius: 8px;
    background-color: #121213;
    color: white;
    font-size: 1em;
}

.word-list select:focus {
    outline: none;
    border-color: #6aaa64;
}

a {
    color: #6aaa64;
    text-decoration: none;
    font-weight: bold;
}

a:hover {
    text-decoration: underline;
}

#game-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

#back-btn {
    position: fixed !important;
    top: 16px !important;
    left: 16px !important;
    z-index: 50 !important;
    padding: 8px 16px !important;
    font-size: 1em !important;
}

#new-game-link {
    display: block;
    width: fit-content;
    margin: 20px auto 0 auto;
    padding: 15px 30px;
    background-color: #6aaa64;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.2em;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s;
    text-align: center;
}

#new-game-link:hover {
    background-color: #5a9a54;
}

.game-over {
    margin: 20px auto;
    max-width: 500px;
    background: #1a1a1b;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    text-align: center;
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.game-over h2 {
    color: #c9b458;
    margin-bottom: 10px;
    font-size: 2em;
}

.game-over p {
    font-size: 1.1em;
}

button {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 5px;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

button:active {
    transform: translateY(0);
}

#solver-status {
    padding: 10px;
    border-radius: 8px;
    font-weight: bold;
}

.info-box {
    margin: 15px auto;
    padding: 15px;
    max-width: 500px;
    background: #1a1a1b;
    border-radius: 8px;
    border: 2px solid #3a3a3c;
    text-align: center;
}

.info-box p {
    margin: 5px 0;
    font-size: 1.1em;
}

.suggestion-item {
    padding: 8px 12px;
    cursor: pointer;
    background-color: #1a1a1b;
    border: 1px solid #565758;
    border-radius: 4px;
    margin: 2px 0;
    transition: background-color 0.2s;
}

.suggestion-item:hover {
    background-color: #3a3a3c;
}

#solve-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 20px;
    margin-bottom: 20px;
}

#solve-buttons button {
    margin-right: 0;
}

#new-game-link {
    display: inline-block;
    margin-left: auto;
    margin-right: auto;
}

/* Tablet optimizations (769px - 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
    body {
        padding: 20px;
        font-size: 16px;
    }

    h1 {
        font-size: 2.2em;
        margin-bottom: 20px;
    }

    form {
        padding: 25px;
        margin: 20px auto;
        max-width: 90%;
        width: 90%;
    }

    .board {
        max-width: 90%;
        width: 90%;
    }

    .board.normal-width {
        max-width: 90%;
    }

    .info-box, .game-over {
        max-width: 90%;
        width: 90%;
        box-sizing: border-box;
    }

    .word-list {
        max-width: 90%;
        width: 90%;
    }

    label {
        font-size: 1.15em;
        margin-bottom: 12px;
    }

    select, input[type="text"], input[type="submit"] {
        padding: 13px;
        font-size: 1em;
        margin-bottom: 12px;
    }

    input[type="submit"] {
        padding: 14px;
        font-size: 1.05em;
    }

    button {
        padding: 11px 22px;
        font-size: 0.95em;
    }

    #solve-buttons {
        flex-wrap: wrap;
        gap: 12px;
    }

    #solve-buttons button {
        margin: 0;
        flex: 0 1 calc(50% - 6px);
    }

    .cell {
        width: clamp(44px, 10vw, 58px);
        height: clamp(44px, 10vw, 58px);
        font-size: clamp(1.1em, 3.5vw, 1.8em);
        margin: 0 3px;
    }

    .board.long-word .cell {
        width: 58px;
        height: 58px;
        min-width: 58px;
        min-height: 58px;
        font-size: 1.6em;
    }
}

/* Mobile optimizations */
@media (max-width: 768px) {
    body {
        padding: 15px;
        font-size: 16px; /* Prevent zoom on iOS */
    }

    h1 {
        font-size: 2em;
        margin-bottom: 15px;
    }

    form {
        padding: 20px;
        margin: 15px auto;
        max-width: 100%;
        width: calc(100% - 30px);
    }

    .info-box, .game-over {
        max-width: 100%;
        width: calc(100% - 30px);
        box-sizing: border-box;
    }

    label {
        font-size: 1.1em;
        margin-bottom: 12px;
    }

    select, input[type="text"], input[type="submit"] {
        padding: 14px; /* Larger touch targets */
        font-size: 1em;
        margin-bottom: 12px;
    }

    input[type="submit"] {
        padding: 16px;
        font-size: 1.1em;
    }

    /* Make guess input visible on mobile */
    #guess-input {
        display: block !important;
        visibility: visible !important;
        opacity: 1 !important;
        position: fixed;
        bottom: -100px; /* Hide off-screen but keep focusable */
        left: -100px;
        width: 1px;
        height: 1px;
        border: none;
        outline: none;
        background: transparent;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    h1 {
        font-size: 1.8em;
        margin-bottom: 12px;
    }

    form {
        padding: 15px;
        margin: 10px auto;
        width: calc(100% - 20px);
    }

    .info-box, .game-over {
        width: calc(100% - 20px);
        padding: 12px;
    }

    .info-box p, .game-over p {
        font-size: 1em;
    }

    label {
        font-size: 1em;
        margin-bottom: 10px;
    }

    select, input[type="text"], input[type="submit"] {
        padding: 16px; /* Even larger touch targets for small screens */
        font-size: 1em;
        margin-bottom: 10px;
    }

    input[type="submit"] {
        padding: 18px;
        font-size: 1.2em;
    }
}

/* Make solver and general buttons full-width / touch-friendly on small screens */
@media (max-width: 480px) {
    #back-btn {
        top: 8px !important;
        left: 8px !important;
        padding: 6px 12px !important;
        font-size: 0.9em !important;
    }
    button:not(#back-btn), #new-game-link {
        width: 100%;
        display: block;
        margin: 8px 0;
        padding: 14px 16px;
        box-sizing: border-box;
    }
    .board {
        padding: 12px;
        width: calc(100% - 24px);
        box-sizing: border-box;
    }
    #solve-buttons {
        flex-direction: column;
        align-items: center;
        gap: 8px;
    }
    .row {
        gap: 2px;
    }
    .cell {
        margin: 0 2px;
    }
    .word-list select {
        max-height: 200px;
        overflow-y: auto;
    }
}

/* Ensure proper viewport handling */
@media (max-width: 320px) {
    body {
        padding: 8px;
    }

    form {
        padding: 10px;
        width: calc(100% - 16px);
    }

    .info-box, .game-over {
        width: calc(100% - 16px);
        padding: 8px;
    }

    .info-box p, .game-over p {
        font-size: 0.9em;
    }

    label {
        font-size: 1em;
        margin-bottom: 8px;
    }

    select, input[type="text"], input[type="submit"] {
        padding: 14px;
    }

    input[type="submit"] {
        padding: 16px;
    }

    button:not(#back-btn), #new-game-link {
        padding: 12px 14px;
    }

    #back-btn {
        top: 4px !important;
        left: 4px !important;
        padding: 4px 8px !important;
        font-size: 0.8em !important;
    }

    .board {
        padding: 8px;
        width: calc(100% - 16px);
        box-sizing: border-box;
    }
}