html, body {
    height: 100%;
    height: 100dvh;
    margin: 0;
    padding: 0;
    overflow: hidden;
    font-family: 'Nanum Gothic', sans-serif;
    background-color: #f0f8ff;
    color: #333;
    touch-action: manipulation;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100dvh;
}

.container {
    background-color: white;
    padding: 30px 20px;
    border-radius: 25px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 90%;
    max-width: 380px;
}

h1 {
    color: #4a90e2;
    font-family: 'Jua', sans-serif;
    font-size: 2.3rem;
    margin-top: 0;
}

.mode-section p,
.container > p {
    margin-bottom: 10px;
}

input[type="text"] {
    padding: 12px 15px;
    font-size: 1.1rem;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    margin-bottom: 20px;
    width: 85%;
    font-family: 'Nanum Gothic', sans-serif;
    text-align: center;
}

select {
    padding: 8px 15px;
    font-family: 'Jua', sans-serif;
    font-size: 1.05rem;
    border-radius: 10px;
    border: 2px solid #ffcc00;
    width: 85%;
    margin-bottom: 20px;
    background: #fff;
}

button {
    background-color: #ffcc00;
    border: none;
    padding: 12px 25px;
    font-size: 1.2rem;
    font-family: 'Jua', sans-serif;
    border-radius: 15px;
    cursor: pointer;
    box-shadow: 0 4px 0 #e6b800;
    transition: all 0.1s;
}

button:active {
    transform: translateY(2px);
    box-shadow: 0 2px 0 #e6b800;
}

.portal-wrap {
    margin-top: 20px;
    margin-bottom: 15px;
}

.portal-link {
    display: inline-block;
    padding: 10px 20px;
    font-size: 1rem;
    font-family: 'Jua', sans-serif;
    background-color: #4a90e2;
    color: white;
    text-decoration: none;
    border-radius: 12px;
    box-shadow: 0 4px 0 #357abd;
    transition: all 0.1s;
    cursor: pointer;
}

.portal-link:hover {
    background-color: #5ba0f2;
    transform: translateY(-1px);
    box-shadow: 0 5px 0 #357abd;
}

.portal-link:active {
    transform: translateY(2px);
    box-shadow: 0 2px 0 #357abd;
}

.creator-info {
    margin-top: 30px;
    font-size: 1rem;
    color: #999;
    border-top: 1px dashed #eee;
    padding-top: 20px;
}

#game-container {
    width: 100vw;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: linear-gradient(180deg, #eaf4ff 0%, #f0f8ff 100%);
}

.top-nav {
    display: flex;
    flex-shrink: 0;
    padding: 8px 12px;
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    align-items: stretch;
    justify-content: space-between;
    min-height: 0;
    box-sizing: border-box;
    z-index: 100;
    overflow: hidden;
}

.ai-chat-area {
    flex: 1 1 auto;
    min-width: 0;
}

.ai-character {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

#ai-img {
    width: 45px;
    height: 45px;
    background-color: #eee;
    border-radius: 50%;
    flex-shrink: 0;
}

.speech-bubble {
    position: relative;
    background: #fff9c4;
    border-radius: 12px;
    padding: 8px 12px;
    font-size: 1rem;
    line-height: 1.4;
    box-shadow: 1px 1px 5px rgba(0, 0, 0, 0.05);
    text-align: left;
    word-break: keep-all;
    max-height: 70px;
    overflow-y: auto;
    font-weight: 500;
    flex: 1 1 auto;
    min-width: 0;
}

.speech-bubble:after {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 0;
    height: 0;
    border: 6px solid transparent;
    border-right-color: #fff9c4;
    border-left: 0;
    margin-top: -6px;
    margin-left: -6px;
}

.header-right {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    margin-left: 10px;
    flex: 0 0 248px;
    width: 248px;
    max-width: 42%;
    box-sizing: border-box;
}

.status-container {
    background-color: #e3f2fd;
    padding: 4px 10px;
    border-radius: 8px;
    width: 100%;
    box-sizing: border-box;
}

#game-status,
#piece-count {
    margin: 0;
    font-weight: 700;
    color: #1976d2;
    white-space: nowrap;
}

#game-status {
    font-size: 0.95rem;
}

#piece-count {
    margin-top: 5px;
    font-size: 0.9rem;
}

.game-creator {
    font-size: 0.7rem;
    color: #bbb;
}

.nav-controls {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    width: 100%;
}

.nav-controls button {
    padding: 6px 4px;
    font-size: 0.78rem;
    background-color: #f5f5f5;
    border-radius: 8px;
    box-shadow: none;
    font-family: 'Nanum Gothic', sans-serif;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3px;
    white-space: nowrap;
    min-width: 0;
    width: 100%;
    box-sizing: border-box;
}

.nav-controls .btn-txt {
    overflow: hidden;
    text-overflow: ellipsis;
}

#btn-new-game {
    background-color: #4a90e2;
    color: white;
}

#btn-pause {
    background-color: #ff9800;
    color: white;
}

#btn-music {
    background-color: #66bb6a;
    color: white;
}

#btn-music.is-muted {
    background-color: #90a4ae;
}

.main-content {
    flex: 1 1 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    padding: 8px 10px 0;
    overflow: hidden;
    min-height: 0;
}

.side-panel {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 110px;
    flex-shrink: 0;
}

.mini-box,
.stat-card {
    background: #fff;
    border-radius: 14px;
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.12);
    padding: 8px;
    text-align: center;
}

.mini-box h3,
.stat-card .stat-label {
    margin: 0 0 6px;
    font-family: 'Jua', sans-serif;
    font-size: 0.95rem;
    color: #4a90e2;
}

.stat-card strong {
    display: block;
    font-family: 'Jua', sans-serif;
    font-size: 1.2rem;
    color: #333;
}

.board-section {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
}

#tetris-board,
#hold-canvas,
#next-canvas {
    display: block;
}

#tetris-board {
    background: #1a2744;
    border: 4px solid #4a90e2;
    border-radius: 12px;
    box-shadow: 0 8px 0 #357abd;
    max-width: 100%;
    max-height: 100%;
}

.game-overlay {
    position: absolute;
    inset: 4px;
    border-radius: 8px;
    background: rgba(26, 39, 68, 0.82);
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 20px;
    z-index: 10;
    pointer-events: auto;
}

.game-overlay.hidden {
    display: none;
}

#overlay-title {
    font-family: 'Jua', sans-serif;
    font-size: 2rem;
    margin: 0 0 8px;
}

#overlay-text {
    margin: 0 0 16px;
    word-break: keep-all;
}

.touch-controls {
    flex-shrink: 0;
    display: flex;
    align-items: stretch;
    gap: 12px;
    padding: 8px 12px max(14px, env(safe-area-inset-bottom));
}

.move-pad {
    flex: 1.35;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-areas:
        ". rotate ."
        "left soft right";
    gap: 8px;
}

.action-pad {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.pad-rotate { grid-area: rotate; }
.pad-left { grid-area: left; }
.pad-soft { grid-area: soft; }
.pad-right { grid-area: right; }

.ctrl-btn {
    min-height: 58px;
    height: 100%;
    padding: 6px 4px;
    font-size: 1.1rem;
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 4px 0 #d0d7e2;
    user-select: none;
    -webkit-user-select: none;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
}

.ctrl-icon {
    font-size: 1.35rem;
    line-height: 1;
}

.ctrl-label {
    font-size: 0.72rem;
    font-family: 'Jua', sans-serif;
    line-height: 1;
}

.ctrl-btn.accent {
    background: #ffcc00;
    box-shadow: 0 4px 0 #e6b800;
}

#btn-hard {
    flex: 1.3;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: white;
    margin: 10vh auto;
    padding: 25px;
    border-radius: 25px;
    width: 85%;
    max-width: 400px;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-content h2 {
    font-family: 'Jua', sans-serif;
    color: #4a90e2;
    margin-top: 0;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

#history-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

#history-table th,
#history-table td {
    padding: 10px;
    font-size: 1rem;
    border-bottom: 1px solid #eee;
    text-align: center;
}

#history-table th {
    background-color: #f8f9fa;
    color: #666;
    font-weight: 700;
}

.empty-history {
    text-align: center;
    color: #999;
    padding: 16px 0;
}

@media (max-width: 720px) {
    .top-nav {
        padding: 6px 8px;
        min-height: auto;
        max-height: none;
        gap: 6px;
    }

    .ai-chat-area {
        min-width: 0;
    }

    #ai-img {
        width: 36px;
        height: 36px;
    }

    .speech-bubble {
        font-size: 0.85rem;
        max-height: 58px;
        padding: 6px 8px;
    }

    .side-panel {
        width: 70px;
    }

    .mini-box,
    .stat-card {
        padding: 6px 4px;
    }

    .mini-box h3,
    .stat-card .stat-label {
        font-size: 0.75rem;
    }

    .header-right {
        flex-basis: 150px;
        width: 150px;
        max-width: 42%;
        margin-left: 6px;
        gap: 4px;
    }

    .nav-controls {
        gap: 4px;
    }

    .nav-controls button {
        font-size: 0.95rem;
        padding: 6px 2px;
    }

    .nav-controls .btn-txt {
        display: none;
    }

    .main-content {
        gap: 6px;
        padding: 6px 6px 0;
    }

    .touch-controls {
        gap: 10px;
        padding: 8px 10px max(16px, env(safe-area-inset-bottom));
    }

    .ctrl-btn {
        min-height: 62px;
        border-radius: 18px;
    }

    .ctrl-icon {
        font-size: 1.5rem;
    }
}

@media (orientation: landscape) {
    #game-container {
        flex-direction: row;
    }

    .top-nav {
        width: 200px;
        min-width: 180px;
        max-width: 220px;
        height: 100vh;
        max-height: 100vh;
        flex-direction: column;
        justify-content: space-between;
        padding: 15px 12px;
        border-right: 2px solid #f0f0f0;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.05);
        overflow-y: auto;
    }

    .ai-chat-area,
    .header-right {
        flex: 0 0 auto;
        width: 100%;
        max-width: 100%;
        min-width: 0;
        margin-left: 0;
        align-items: stretch;
    }

    .status-container,
    .nav-controls,
    .game-creator {
        width: 100%;
        text-align: center;
    }

    .nav-controls {
        justify-content: center;
    }

    .main-content {
        flex: 1;
        padding: 10px;
    }

    .side-panel {
        width: 64px;
    }

    .touch-controls {
        width: 190px;
        min-width: 170px;
        flex-direction: column;
        justify-content: center;
        padding: 8px;
        gap: 8px;
    }

    .action-pad {
        flex-direction: row;
    }

    .ctrl-btn {
        min-height: 46px;
        border-radius: 14px;
    }

    .ctrl-icon {
        font-size: 1.2rem;
    }

    .ctrl-label {
        font-size: 0.65rem;
    }

    #btn-hold,
    #btn-hard {
        flex: 1;
        min-height: 56px;
    }
}