/* 기본 설정 및 테마 변수 (다크 모드 기본) */
:root {
    --bg-color: #0b1120;
    --text-color: #ffffff;
    --card-bg: #111827;
    --border-color: #1f2937;
    --blue-btn: #3b82f6;
    --blue-btn-hover: #2563eb;
    --gray-btn: #2a2a2a;
    --gray-btn-hover: #404040;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* 라이트 모드 변수 */
[data-theme="light"] {
    --bg-color: #f8f9fa;
    --text-color: #18181b;
    --card-bg: #ffffff;
    --border-color: #e4e4e7;
    --blue-btn: #2563eb;
    --blue-btn-hover: #1d4ed8;
    --gray-btn: #f1f5f9;
    --gray-btn-hover: #e2e8f0;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: 'Pretendard', -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* 상단 네비게이션 및 테마 버튼 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 900;
}

.theme-btn {
    background: transparent;
    color: var(--text-color);
    border: none;
    padding: 10px 15px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.theme-btn:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .theme-btn:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

/* 메인 인사말 영역 */
.hero {
    text-align: center;
    padding: 100px 20px;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 50px;
    color: #a1a1aa;
}

/* 버튼 디자인 */
.button-group {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.2s ease;
}

.invite-btn {
    background-color: var(--blue-btn);
    color: #ffffff;
}

.invite-btn:hover {
    background-color: var(--blue-btn-hover);
    transform: translateY(-2px);
}

.discord-btn {
    background-color: var(--gray-btn);
    color: var(--text-color);
}

.discord-btn:hover {
    background-color: var(--gray-btn-hover);
    transform: translateY(-2px);
}

/* 핵심 특징: 세련된 카드 */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    padding: 0 40px 60px 40px;
}

.feature-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: transform 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.card-icon {
    font-size: 2rem;
    color: var(--blue-btn);
    margin-bottom: 25px;
}

.feature-card h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.feature-card p {
    font-size: 1rem;
    line-height: 1.7;
    color: #a1a1aa;
}

/* 디그봇 전체 기능 목록 섹션 스타일 추가 */
.command-list-section {
    padding: 0 40px 100px 40px;
}

.command-list-section h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 40px;
    text-align: center;
}

.command-category {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 25px;
    box-shadow: var(--shadow);
}

.command-category h3 {
    font-size: 1.3rem;
    color: var(--blue-btn);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.cmd-list {
    list-style: none;
}

.cmd-list li {
    padding: 10px 0;
    border-bottom: 1px solid rgba(128, 128, 128, 0.1);
    font-size: 0.95rem;
    line-height: 1.5;
    color: #a1a1aa;
}

.cmd-list li:last-child {
    border-bottom: none;
}

.cmd-list li strong {
    color: var(--text-color);
    display: inline-block;
    min-width: 140px;
    background-color: rgba(59, 130, 246, 0.1);
    padding: 3px 8px;
    border-radius: 4px;
    margin-right: 10px;
}

/* 하단 푸터 및 라이선스 영역 */
footer {
    text-align: center;
    padding: 30px 20px;
    font-size: 0.9rem;
    color: #71717a;
    background-color: rgba(0, 0, 0, 0.03);
}

.license-warning {
    margin-top: 8px;
    color: #ef4444; /* 경고를 뜻하는 붉은 계열 색상 */
    font-weight: bold;
}