:root {
    --primary-color: #333;
    --accent-color: #4a90e2;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-main: #2c3e50;
    --text-sub: #7f8c8d;
    --border-radius: 12px;
    --board-color: #e6cba5;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

:root.theme-dark {
    color-scheme: dark;
    --primary-color: #1b3a5c;
    --accent-color: #4aa3ff;
    --bg-color: #07111d;
    --card-bg: #0b1b2d;
    --text-main: #e6edf3;
    --text-sub: rgba(230, 237, 243, 0.68);
    --board-color: #c8ab7f;
    --shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
}

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

html {
    height: 100%;
    overflow: hidden;
    overscroll-behavior: none;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    margin: 0;
    color: var(--text-main);
    display: flex;
    justify-content: center;
    height: 100%;
    width: 100%;
    position: fixed;
    overflow: hidden;
    overscroll-behavior: none;
    touch-action: none;
}

.app-container {
    width: 100%;
    max-width: 600px; 
    height: 100%;
    /* 解决移动端浏览器地址栏遮挡问题 */
    height: calc(var(--vh, 1vh) * 100);
    position: relative;
    background-color: var(--bg-color);
    overflow: hidden;
    touch-action: none; /* Prevent global scroll/zoom on app container */
}

/* Ensure interactive elements are clickable */
button, input, label, a {
    touch-action: manipulation;
}

/* 视图管理 */
.view {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    min-height: 100%;
    min-height: calc(var(--vh, 1vh) * 100);
    display: flex;
    flex-direction: column;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, transform 0.3s ease;
    transform: translateY(20px);
    z-index: 1;
}

.view.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    z-index: 10;
    position: relative; 
    transform: none;
    animation: slideUp 0.3s ease;
}

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

.hidden {
    display: none !important;
}