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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d1818 100%);
    color: #f5f5f5;
    min-height: 100vh;
    padding: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

h1 {
    margin-bottom: 20px;
    color: #FF5252;
    font-size: 2.2em;
    text-shadow: 0 0 15px rgba(255, 82, 82, 0.5);
}

h2 {
    margin: 15px 0;
    color: #f5f5f5;
    font-size: 1.2em;
}

p {
    margin-bottom: 10px;
    color: #b0b0b0;
}

#nickname-input {
    width: 100%;
    max-width: 350px;
    padding: 12px 15px;
    margin-bottom: 15px;
    border: 2px solid #444;
    border-radius: 8px;
    font-size: 1em;
    outline: none;
    background-color: #252525;
    color: #f5f5f5;
    transition: all 0.3s;
}

#nickname-input:focus {
    border-color: #C62828;
    box-shadow: 0 0 10px rgba(198, 40, 40, 0.4);
}

#nickname-input::placeholder {
    color: #666;
}

button {
    padding: 10px 20px;
    margin: 5px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    background: linear-gradient(135deg, #C62828 0%, #B71C1C 100%);
    color: white;
    transition: all 0.3s;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
    min-width: 160px;
}

button:hover {
    background: linear-gradient(135deg, #B71C1C 0%, #8B0000 100%);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(198, 40, 40, 0.6);
}

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

.button-group {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

/* Game Container untuk Layout Side by Side (Desktop) */
.game-container {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    justify-content: center;
    flex-wrap: wrap;
    width: 100%;
    max-width: 1200px;
}

.game-left {
    flex: 1;
    min-width: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.board {
    display: grid;
    grid-template-columns: repeat(3, 100px);
    grid-template-rows: repeat(3, 100px);
    gap: 12px;
    margin: 20px auto;
}

.cell {
    background: linear-gradient(135deg, #252525 0%, #1a1a1a 100%);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 3.5em;
    cursor: pointer;
    transition: all 0.3s;
    border: 3px solid #333;
}

.cell:hover:not(.x):not(.o) {
    background: linear-gradient(135deg, #3d3d3d 0%, #2a2a2a 100%);
    transform: scale(1.05);
    border-color: #C62828;
    box-shadow: 0 0 20px rgba(198, 40, 40, 0.4);
}

.cell.x {
    color: #FF5252;
    background: linear-gradient(135deg, #2d1a1a 0%, #1a0f0f 100%);
    border-color: #FF5252;
    text-shadow: 0 0 20px rgba(255, 82, 82, 0.8);
}

.cell.o {
    color: #FFA726;
    background: linear-gradient(135deg, #2d2314 0%, #1a1609 100%);
    border-color: #FFA726;
    text-shadow: 0 0 20px rgba(255, 167, 38, 0.8);
}

.cell.winning {
    animation: pulse 1s infinite alternate;
}

@keyframes pulse {
    from {
        box-shadow: 0 0 15px 5px #C62828;
        transform: scale(1);
    }
    to {
        box-shadow: 0 0 30px 10px #C62828;
        transform: scale(1.08);
    }
}

#status-message {
    min-height: 35px;
    margin: 15px 0;
    font-size: 1.2em;
    font-weight: 600;
    color: #f5f5f5;
}

#score-display {
    font-size: 1.1em;
    font-weight: 600;
    color: #f5f5f5;
    margin: 15px 0;
    padding: 8px 15px;
    background-color: #252525;
    border: 2px solid #444;
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
}

.player-score {
    display: flex;
    align-items: center;
    gap: 5px;
}

.player-score .player-name {
    font-weight: 400;
    color: #b0b0b0;
}

.score-value {
    font-size: 1.2em;
    font-weight: 800;
    padding: 0 3px;
}

.p1-score .score-value {
    color: #FF5252;
}

.p2-score .score-value {
    color: #FFA726;
}

.score-separator {
    color: #666;
    font-size: 1.3em;
    padding: 0 5px;
}

#room-id-display {
    font-size: 0.9em;
    color: #FFA726;
    margin-bottom: 10px;
    padding: 8px 15px;
    background-color: rgba(198, 40, 40, 0.15);
    border-radius: 10px;
    border: 2px solid rgba(198, 40, 40, 0.3);
    display: inline-block;
}

#share-link-container {
    margin: 15px 0;
    max-width: 500px;
}

.share-box {
    display: flex;
    gap: 10px;
    margin-top: 5px;
}

#share-link-input {
    flex-grow: 1;
    padding: 10px 12px;
    border: 2px solid #444;
    border-radius: 8px;
    font-size: 0.9em;
    background-color: #252525;
    color: #f5f5f5;
}

#copy-link-btn {
    background: linear-gradient(135deg, #455A64 0%, #37474F 100%);
    min-width: 100px;
}

#copy-link-btn:hover {
    background: linear-gradient(135deg, #37474F 0%, #263238 100%);
}

#nickname-save-status {
    color: #FFA726;
    font-weight: 600;
    min-height: 20px;
}

#leave-room-btn {
    background: linear-gradient(135deg, #455A64 0%, #37474F 100%);
}

#leave-room-btn:hover {
    background: linear-gradient(135deg, #37474F 0%, #263238 100%);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.6);
}

/* ========================================= */
/* CHAT & EMOJI SECTION (Desktop Default)    */
/* ========================================= */
.chat-section {
    width: 100%;
    max-width: 350px;
    background-color: #252525;
    border: 2px solid #444;
    border-radius: 12px;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 450px;
    max-height: 600px;
    flex: none; 
}

/* Header di Desktop (Tidak ada mekanisme toggle, hanya tampilan) */
.chat-toggle-header {
    display: flex; 
    justify-content: flex-start; 
    align-items: center;
    padding: 15px 15px 10px 15px; 
    border-bottom: 2px solid #444; 
    cursor: default; 
    min-height: auto;
}

/* Icon panah disembunyikan di Desktop */
.chat-toggle-icon {
    display: none; 
}

.chat-header-title {
    font-size: 1.1em;
    font-weight: 600;
    color: #FFA726;
    margin: 0; 
    padding: 0;
    display: flex;
    align-items: center;
}

/* Penyesuaian visual untuk perataan ikon dan teks di desktop */
.chat-header-title i {
    margin-right: 8px;
    position: relative;
    top: 1px; 
}

/* Hitungan pesan di desktop (default non-menonjol) */
#unread-count {
    color: #FFA726; 
    font-weight: 700;
    margin-left: 5px;
    transition: color 0.3s;
}

.chat-content-wrapper {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 10px 15px 15px 15px; 
    min-height: 0;
}


.emoji-picker {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 15px;
    padding: 10px;
    background-color: #1a1a1a;
    border-radius: 8px;
}

.emoji-btn {
    font-size: 1.8em;
    padding: 5px 10px;
    background: transparent;
    border: 2px solid #444;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    min-width: auto;
    margin: 0;
}

.emoji-btn:hover {
    background-color: #3d3d3d;
    transform: scale(1.1);
    border-color: #FFA726;
}

.messages-container {
    flex: 1;
    overflow-y: auto;
    margin-bottom: 15px;
    padding: 10px;
    background-color: #1a1a1a;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.messages-container::-webkit-scrollbar {
    width: 8px;
}

.messages-container::-webkit-scrollbar-track {
    background: #252525;
    border-radius: 4px;
}

.messages-container::-webkit-scrollbar-thumb {
    background: #444;
    border-radius: 4px;
}

.message {
    padding: 8px 12px;
    border-radius: 8px;
    max-width: 85%;
    word-wrap: break-word;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.own {
    align-self: flex-end;
    background: linear-gradient(135deg, #C62828 0%, #B71C1C 100%);
    color: white;
}

.message.other {
    align-self: flex-start;
    background-color: #3d3d3d;
    color: #f5f5f5;
}

.message.emoji-only {
    font-size: 2.5em;
    background: transparent;
    padding: 5px;
}

.message-author {
    font-size: 0.75em;
    font-weight: 600;
    margin-bottom: 3px;
    opacity: 0.8;
}

.message-text {
    font-size: 0.95em;
}

.message-time {
    font-size: 0.7em;
    opacity: 0.6;
    margin-top: 3px;
}

.chat-input-container {
    display: flex;
    gap: 8px;
}

#chat-input {
    flex: 1;
    padding: 10px 12px;
    border: 2px solid #444;
    border-radius: 8px;
    background-color: #1a1a1a;
    color: #f5f5f5;
    font-size: 0.95em;
    outline: none;
    transition: all 0.3s;
}

#chat-input:focus {
    border-color: #C62828;
    box-shadow: 0 0 10px rgba(198, 40, 40, 0.4);
}

#send-chat-btn {
    padding: 10px 20px;
    min-width: auto;
    background: linear-gradient(135deg, #C62828 0%, #B71C1C 100%);
}

.hidden {
    display: none !important;
}

.screen {
    transition: opacity 0.5s;
    text-align: center;
}

/* ========================================================= */
/* RESPONSIVE & TOGGLE LOGIC (Untuk Mobile)                  */
/* ========================================================= */
@media (max-width: 768px) {
    /* Mengubah Body agar bisa mengakomodasi fixed footer dan membatasi tinggi konten */
    body {
        justify-content: flex-start;
        padding-bottom: 350px; /* Default padding untuk chat TERBUKA */
    }

    /* Mengubah Game Container menjadi kolom (Sudah ada) */
    .game-container {
        flex-direction: column;
        align-items: center;
        width: 100%;
    }

    /* Menata Chat Section agar FIXED di bagian bawah */
    .chat-section {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        z-index: 100;
        max-width: 100%;
        height: 350px;
        border-radius: 12px 12px 0 0;
        border: none;
        border-top: 2px solid #444;
        margin: 0;
        padding: 0;
        transition: transform 0.3s ease-out; 
        transform: translateY(0); /* POSISI TERBUKA (default) */
    }
    
    /* Tampilkan Header Toggle di Mobile */
    .chat-toggle-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 10px 15px;
        font-size: 1.1em;
        font-weight: 600;
        color: #FFA726;
        background-color: #252525;
        border-radius: 12px 12px 0 0;
        cursor: pointer;
        user-select: none;
        border-bottom: 2px solid #444;
        min-height: 46px; 
    }
    
    /* FIX ALIGNMENT ICON DI DALAM JUDUL */
    .chat-header-title {
        margin: 0; 
        padding: 0;
        display: flex;
        align-items: center;
    }

    .chat-header-title i {
        margin-right: 8px;
        /* Penyesuaian visual ke bawah */
        position: relative;
        top: 1px; 
    }

    /* FIX ALIGNMENT ICON TOGGLE */
    .chat-toggle-icon {
        transition: transform 0.3s ease;
        transform: rotate(0deg);
        /* Penyesuaian visual ke bawah */
        position: relative;
        top: 1px; 
        display: block; /* Pastikan terlihat di mobile */
    }

    /* Atur agar hitungan pesan terlihat jelas di mobile (indicator) */
    #unread-count {
        color: #FF5252; 
        font-weight: 800;
        margin-left: 5px;
    }
    
    /* Konten Chat Body */
    .chat-content-wrapper {
        display: flex;
        flex-direction: column;
        height: calc(100% - 46px);
        padding: 10px 15px 15px 15px; 
    }
    
    /* === MINIMIZED STATE CLASS === */
    .chat-section.minimized {
        /* Geser panel ke bawah sehingga hanya header yang terlihat */
        transform: translateY(calc(100% - 46px)); 
    }

    .chat-section.minimized .chat-toggle-icon {
        transform: rotate(180deg); /* Icon menunjuk ke bawah */
    }
}

@media (max-width: 500px) {
    h1 {
        font-size: 2em;
    }

    .button-group {
        flex-direction: column;
        gap: 10px;
    }

    .board {
        grid-template-columns: repeat(3, 80px);
        grid-template-rows: repeat(3, 80px);
        gap: 8px;
    }

    .cell {
        font-size: 3em;
        border-radius: 10px;
    }

    #score-display {
        flex-direction: column;
        gap: 5px;
        padding: 10px;
    }

    .score-separator {
        display: none;
    }

    .emoji-btn {
        font-size: 1.5em;
        padding: 3px 8px;
    }
    
    /* Sesuaikan tinggi chat section untuk layar yang lebih kecil */
    .chat-section {
        height: 320px; 
    }
    body {
        padding-bottom: 320px;
    }
    
    .chat-section.minimized {
        transform: translateY(calc(100% - 46px)); 
    }
}