@font-face {
    font-family: 'KoreanKRSM';
    font-style: normal;
    src: url("../assets/KoreanKRSM.ttf") format("truetype");
}

:root {
    --primary-color: #2D2D2D;
    --secondary-color: #FF0405;
    --text-color: #ffffff;
    --accent-color: #000000;
    --spacing-unit: 1rem;
    --border-radius: 0.25rem;
}

* {
    font-family: var(--font-family), sans-serif;
    font-weight: bold;
    box-sizing: border-box;
}

html,
body {
    padding: 0;
    margin: 0;
    margin-bottom: var(--spacing-unit);
}

body {
    height: 100%;
    font-size: 18px;
    overflow-x: hidden;
    background-size: cover;
    background-color: var(--primary-color);
    background-image: url('../assets/background.jpg');
    background-blend-mode: overlay;
    background-attachment: fixed;
    line-height: 1.6;
    max-width: 1600px;
    margin: 0 auto;
}

.action-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin: var(--spacing-unit) 0;
}

.action-buttons .action-btn {
    flex: 1;
    max-width: 200px;
    padding: 0 var(--spacing-unit);
}

body, div {
    color: var(--text-color);
}

h2,
p,
label,
button {
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    margin-top: calc(var(--spacing-unit) * 0.5);
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

h2 {
    font-size: 1.75rem;
    margin-top: var(--spacing-unit);
    margin-bottom: var(--spacing-unit);
}

hr {
    border: 0;
    height: 2px;
    background-image: linear-gradient(to right, rgba(0, 0, 0, 0), rgba(0, 0, 0, 1), rgba(0, 0, 0, 0));
    margin: calc(var(--spacing-unit) * 1.5) 0;
}

a {
    color: var(--text-color);
    -webkit-text-stroke-width: .5px;
    -webkit-text-stroke-color: var(--accent-color);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    filter: invert(1);
    text-decoration: underline;
}

#lang-selector {
    display: flex;
    justify-content: flex-end;
    padding: calc(var(--spacing-unit) * 0.5) 0;
    margin-bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    border-radius: var(--border-radius);
    padding: 8px 15px;
    border-bottom: 2px solid var(--secondary-color);
    font-size: 1rem;
    margin-bottom: 15px;
}

#lang-selector select {
    background-color: rgba(0, 0, 0, 0.7);
    color: var(--text-color);
    border: 2px solid var(--secondary-color);
    padding: 8px 12px;
    border-radius: var(--border-radius);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

#lang-selector select:hover {
    background-color: var(--secondary-color);
}

#header {
    display: grid;
    grid-template-columns: 35% 1fr;
    height: 100%;
    align-items: center;
    padding: var(--spacing-unit) 0;
    margin-bottom: var(--spacing-unit);
}

#header > #intro-text {
    text-align: right;
    vertical-align: middle;
    padding-right: calc(var(--spacing-unit) * 2);
}

#header > #intro-text h2 {
    margin-top: 0;
    font-size: 2rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

#header > #intro-icon {
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

#header > #intro-icon > img {
    position: relative;
    width: 40%;
    padding-left: calc(var(--spacing-unit) * 2);
    transition: transform 0.3s ease;
}

#header > #intro-icon > img:hover {
    transform: scale(1.05);
}

#beta {
    position: absolute;
    font-size: small;
}

#credits {
    color: white;
    font-size: 18px;
    padding-left: 30px;
    padding-right: 30px;
    text-align: center;
    margin: 20px auto;
}

#credits > * {
    margin: 2px;
}

#footer {
    margin-top: 40px;
    padding: 20px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.centered-credits {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    background-color: rgba(0, 0, 0, 0.2);
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

#support {
    position: absolute;
    display: grid;
    grid-template-rows: 1fr 1fr 1fr;
    text-align: center;
    right: 5%;
    transform: translateY(-120%);
}

#support > button > a {
    color: black;
    text-shadow: none;
}

.version {
    font-size: 12px;
    text-align: center;
    padding-top: 10px;
}

.mobile {
    display: none;
}

.notice {
    width: 90%;
    font-size: 16px;
    margin-left: auto;
    margin-right: auto;
    background-color: white;
    color: black;
    text-align: center;
    text-shadow: none;
    border: 3px solid black;
    z-index: 10;
}

#lang-options {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

#lang-options > select {
    width: 69%;
}

#lang-options > select > option {
    font-family: Arial, Helvetica, sans-serif;
}

/* 移动设备优化 */
.mobile-helper {
    display: none;
    text-align: center;
    margin: 10px 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    background-color: rgba(255, 4, 5, 0.1);
    padding: 8px;
    border-radius: 4px;
}

.tab-label {
    display: none;
    font-size: 0.8rem;
    margin-top: 4px;
}

/* Options */
.options-tab {
    display: none;
    padding: 10px;
    margin-bottom: 10px;
}

.options-tab.active {
    display: block;
}

.options-tab h2 {
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 1.8em;
    font-weight: bold;
    color: var(--text-color);
    text-align: center;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
}

/* 设计面板样式 */
.design-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    padding: 15px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.design-section {
    background-color: rgba(45, 45, 45, 0.7);
    border-radius: 8px;
    padding: 15px;
    border-left: 3px solid var(--secondary-color);
}

.design-section h3 {
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 1.2em;
    color: var(--text-color);
    display: flex;
    align-items: center;
}

.design-section h3 i {
    margin-right: 8px;
    color: var(--secondary-color);
}

.design-controls {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.control-group {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.input-with-unit {
    display: flex;
    align-items: center;
}

.input-with-unit input {
    width: 70px;
    margin-right: 5px;
}

.unit {
    color: var(--text-color);
    opacity: 0.8;
}

@media screen and (max-width:767px),
screen and (max-device-width:767px) {
    .mobile {
        display: block;
    }

    .mobile-helper {
        display: block;
        font-size: 0.85rem;
        padding: 10px;
        margin: 15px 0;
        border-radius: 8px;
    }

    .tab-label {
        display: block;
    }

    body {
        font-size: 16px;
        padding: 0 12px;
        line-height: 1.5;
    }

    #header {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto;
        text-align: center;
        gap: 20px;
        margin-bottom: 20px;
        padding: 15px 0;
    }

    #header > #intro-text {
        padding-right: 0;
        text-align: center;
        order: 2;
    }

    #header > #intro-text h2 {
        font-size: 1.6rem;
        margin-bottom: 10px;
        line-height: 1.3;
    }

    #header > #intro-icon {
        justify-content: center;
        order: 1;
    }

    #header > #intro-icon > img {
        width: 35%;
        padding-left: 0;
        max-width: 150px;
    }

    #support {
        position: relative;
        transform: none;
        margin: 20px auto;
        width: 95%;
    }

    hr {
        margin: 20px 0;
    }

    /* 改善触摸体验 */
    button, input, select, textarea {
        font-size: 16px; /* 防止iOS缩放 */
        touch-action: manipulation; /* 改善触摸响应 */
        -webkit-tap-highlight-color: rgba(0,0,0,0.1);
    }

    /* 添加滑动导航支持的样式 */
    #options {
        scroll-behavior: smooth;
        -webkit-overflow-scrolling: touch;
    }

    /* 设计面板在移动设备上的样式 */
    .design-panel {
        padding: 15px;
        gap: 15px;
        border-radius: 12px;
    }

    .design-section {
        padding: 15px;
        border-radius: 10px;
    }

    .design-section h3 {
        font-size: 1.1rem;
        margin-bottom: 15px;
    }

    .control-group {
        flex-direction: column;
        align-items: flex-start;
        margin-bottom: 15px;
    }

    .control-group label {
        margin-bottom: 8px;
        font-weight: 500;
    }

    .input-with-unit {
        width: 100%;
        display: flex;
        align-items: center;
    }

    .input-with-unit input {
        flex: 1;
        margin-right: 8px;
    }

    .input-with-unit .unit {
        font-size: 0.9rem;
        color: rgba(255, 255, 255, 0.7);
    }

    /* 操作按钮优化 */
    .action-buttons {
        gap: 8px;
        flex-direction: row;
        align-items: center;
        justify-content: center;
        flex-wrap: nowrap;
        margin: 15px 0;
    }

    .action-buttons button {
        flex: 1;
        min-width: 100px;
        max-width: 140px;
        margin: 0;
        font-size: 13px;
        padding: 10px 8px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    .action-buttons button i {
        margin-right: 4px;
        font-size: 12px;
    }
}