/* style.css */

:root {
    --primary-color: #364d79;    /* 네이비 포인트 */
    --bg-color: #f0f2f5;         /* 배경색 */
    --card-bg: #ffffff;
    --text-main: #1a202c;
    --text-sub: #718096;
    --border-color: #e2e8f0;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: 'Noto Sans KR', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

/* 상단 정보 바 */
.user-status-bar {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.premium-badge {
    background-color: var(--primary-color);
    color: #fff;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: bold;
    font-size: 0.75rem;
}

.btn-logout {
    background: none;
    border: 1px solid var(--border-color);
    padding: 5px 12px;
    border-radius: 6px;
    color: var(--text-sub);
    cursor: pointer;
    font-size: 0.85rem;
    transition: 0.2s;
}

.btn-logout:hover {
    background-color: #edf2f7;
    color: #1a202c;
}

/* 중앙 타이틀 */
.premium-header {
    text-align: center;
    margin: 40px 0;
}

.premium-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -1px;
}

/* 필터 바 */
.filter-bar {
    background: var(--card-bg);
    padding: 15px 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.filter-group { display: flex; gap: 10px; }

.filter-group select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: #4a5568;
}

.btn-random {
    background: #fff;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 8px 18px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s;
}

.btn-random:hover { background: #f0f4ff; }

/* 문제 카드 */
.card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow);
}

.card-header-info {
    font-size: 0.9rem;
    color: var(--text-sub);
    margin-bottom: 10px;
}

.card-question {
    font-size: 1.3rem;
    font-weight: 500;
    margin-bottom: 30px;
}

/* 보기 버튼 */
.choices { display: flex; flex-direction: column; gap: 12px; }

.choice-btn {
    display: flex;
    align-items: center;
    padding: 18px 25px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: #fff;
    text-align: left;
    cursor: pointer;
    transition: 0.2s;
}

.choice-btn:hover { border-color: var(--primary-color); }

.choice-num {
    width: 26px;
    height: 26px;
    background: #f1f5f9;
    border-radius: 50%;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    margin-right: 15px;
    font-weight: bold;
    font-size: 0.8rem;
    color: var(--text-sub);
}

/* 푸터 */
.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #f1f5f9;
}

.btn-nav {
    padding: 10px 24px;
    border: 1px solid var(--border-color);
    background: #fff;
    border-radius: 8px;
    cursor: pointer;
}

.btn-nav.active {
    color: var(--primary-color);
    border-color: var(--primary-color);
    font-weight: bold;
}

.btn-nav:disabled { opacity: 0.3; }

/* style.css 하단에 추가 또는 덮어쓰기 */

/* 메인 로그인 컨테이너 중앙 정렬 */
.main-auth-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 80vh; /* 화면 높이에 맞춰 중앙 배치 */
}

.auth-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    width: 100%;
    max-width: 420px;
    transition: transform 0.3s ease;
}

.auth-header {
    margin-bottom: 30px;
    text-align: center;
}

.auth-header h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.auth-header p {
    color: var(--text-sub);
    font-size: 0.95rem;
}

/* 입력창 스타일 강화 */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 25px;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper .icon {
    position: absolute;
    left: 15px;
    font-size: 1.1rem;
}

.input-wrapper input {
    width: 100%;
    padding: 14px 14px 14px 45px; /* 아이콘 공간 확보 */
    border: 1.5px solid #eef0f2;
    border-radius: 12px;
    font-size: 1rem;
    outline: none;
    transition: all 0.2s;
    background-color: #f9fbff;
}

.input-wrapper input:focus {
    border-color: var(--primary-color);
    background-color: #fff;
    box-shadow: 0 0 0 4px rgba(54, 77, 121, 0.1);
}

/* 버튼 스타일 강화 */
.main-btn {
    width: 100%;
    padding: 14px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    margin-bottom: 10px;
}

.btn-primary:hover {
    background-color: #2a3d61;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: #fff;
    color: var(--primary-color);
    border: 1.5px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: #f0f4ff;
}

.auth-footer-text {
    margin-top: 20px;
    font-size: 0.85rem;
    color: var(--text-sub);
    text-align: center;
}

.btn-outline {
    background: none;
    border: 1px solid #ddd;
    color: #888;
    margin-top: 10px;
}

/* 메인 페이지 헤더 중앙 정렬 */
.main-header {
    background-color: #fff;
    padding: 30px 0;
    text-align: center; /* 텍스트 중앙 정렬 */
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.main-header h1 {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: -1px;
    margin: 0;
}

/* index.html의 로그아웃 버튼 스타일 */
.btn-logout-main {
    background-color: transparent;
    border: 1px solid #cbd5e0;
    color: #718096;
    padding: 12px;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%; /* 위쪽 파란 버튼과 너비를 맞춤 */
    margin-top: 10px;
}

.btn-logout-main:hover {
    background-color: #f7fafc;
    color: #2d3748;
    border-color: #a0aec0;
}

/* 결과 메시지 공통 */
.result-msg {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
}
.result-msg.success { color: #2ecc71; }
.result-msg.error { color: #e74c3c; }

/* 정답 안내 텍스트 */
.correct-info {
    background-color: #f8f9fa;
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 15px;
    font-size: 1rem;
    color: #4a5568;
}

/* 해설 박스 디자인 */
.explanation-box {
    text-align: left;
    background-color: #f0f4ff;
    border-left: 4px solid var(--primary-color);
    padding: 15px;
    border-radius: 4px 12px 12px 4px;
    margin-top: 15px;
}

.exp-title {
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.exp-content {
    font-size: 0.95rem;
    color: #2d3748;
    line-height: 1.6;
    word-break: keep-all;
}

/* 관리자 버튼 및 패널 스타일 */
.btn-admin-outline {
    background: #fff;
    border: 1px solid #e53e3e;
    color: #e53e3e;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    cursor: pointer;
}

.admin-panel-card {
    background: #fff5f5;
    border: 1px solid #feb2b2;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}

.admin-form-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 15px;
}

.full-row { grid-column: span 3; height: 80px; }

.admin-actions {
    margin-top: 15px;
    display: flex;
    gap: 10px;
}

.btn-ai-gen {
    background-color: #805ad5;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
}

.admin-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.stat-card {
    background: white;
    padding: 15px;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    text-align: center;
    border: 1px solid #edf2f7;
}

.stat-label {
    display: block;
    font-size: 0.75rem;
    color: #718096;
    margin-bottom: 5px;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 800;
    color: #2d3748;
}

.btn-refresh-stats {
    background-color: #edf2f7;
    color: #4a5568;
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
}

/* 유저 관리 테이블 스타일 */
.user-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
    font-size: 0.9rem;
}

.user-table th, .user-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #edf2f7;
}

.user-table th {
    background-color: #f7fafc;
    color: #4a5568;
    font-weight: 600;
}

.badge-free { color: #718096; background: #edf2f7; padding: 2px 6px; border-radius: 4px; font-size: 0.75rem; }
.badge-premium { color: #3182ce; background: #ebf8ff; padding: 2px 6px; border-radius: 4px; font-size: 0.75rem; }
.badge-admin { color: #e53e3e; background: #fff5f5; padding: 2px 6px; border-radius: 4px; font-size: 0.75rem; }

.user-table select {
    padding: 4px;
    border-radius: 4px;
    border: 1px solid #cbd5e0;
}

/* 삭제 버튼 호버 효과 */
.user-table button:hover {
    transform: scale(1.2);
    transition: transform 0.2s;
}

/* badge 스타일 누락 방지 (기존 코드 확인용) */
.badge-admin { background: #fee2e2; color: #991b1b; padding: 2px 8px; border-radius: 4px; font-weight: bold; }
.badge-premium { background: #dbeafe; color: #1e40af; padding: 2px 8px; border-radius: 4px; font-weight: bold; }
.badge-free { background: #f3f4f6; color: #374151; padding: 2px 8px; border-radius: 4px; }