/* style.css */
:root {
    --primary-color: #1a64c4;
    --bg-color: #f4f7f6;
    --card-bg: #ffffff;
    --text-color: #333;
}

body {
    font-family: 'Pretendard', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
}

header {
    text-align: center;
    padding: 50px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); /* 반응형 핵심 */
    gap: 20px;
    padding: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.project-card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.project-card:hover {
    transform: translateY(-10px);
}

.icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.btn {
    display: inline-block;
    margin-top: 15px;
    padding: 10px 25px;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: bold;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.btn:hover {
    background-color: #124b96;
    transform: translateY(-2px);
}

/* 모바일 대응: 화면이 작아지면 여백 조정 */
@media (max-width: 600px) {
    .container {
        padding: 20px;
    }
}

/* ── 프로젝트 공통 레이아웃 ── */

/* 아이콘 + 제목 상단 바 */
.proj-header {
    max-width: 1300px;
    margin: 0 auto;
    padding: 14px 24px 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border-bottom: 1px solid #e8ecf5;
}
.proj-header .proj-icon {
    font-size: 1.4rem;
    color: var(--primary-color);
    line-height: 1;
}
.proj-header .proj-title {
    font-size: 1rem;
    font-weight: 700;
    color: #1a1a2e;
    margin: 0;
}

/* 일반 콘텐츠 래퍼 (스크롤 허용 페이지) */
.proj-wrapper {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px;
}

/* 전체화면 콘텐츠 래퍼 (게임·칠판·채팅 등) */
.proj-fullscreen {
    width: 100%;
    height: calc(100vh - 145px); /* 사이트 헤더 ~95px + proj-header ~50px */
    overflow: hidden;
}

/* 공통 버튼 */
.proj-btn {
    display: inline-block;
    padding: 8px 20px;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s;
}
.proj-btn:hover { background: #124b96; }
.proj-btn.secondary {
    background: #fff;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}
.proj-btn.secondary:hover { background: #e8f0fe; }

/* 공통 카드 */
.proj-card {
    background: #fff;
    border-radius: 14px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.07);
    border: 1px solid #e8ecf5;
}

/* 공통 인풋 */
.proj-input {
    width: 100%;
    padding: 9px 14px;
    border: 1.5px solid #d0d8e8;
    border-radius: 8px;
    font-size: 0.9rem;
    outline: none;
    box-sizing: border-box;
    transition: border-color 0.2s;
}
.proj-input:focus { border-color: var(--primary-color); }

/* 공통 라벨 */
.proj-label {
    font-size: 0.82rem;
    font-weight: 600;
    color: #555;
    margin-bottom: 5px;
    display: block;
}