/* ========================================
   비결 만세력 웹사이트 - 기본 스타일
   ======================================== */

/* CSS 변수 (Color Palette) */
:root {
    --primary: #001F3F;
    --primary-light: #002A5A;
    --primary-dark: #001428;
    
    --secondary: #00D084;
    --secondary-light: #00F0A4;
    --secondary-dark: #00A064;
    
    --accent: #00A8E8;
    --accent-light: #00C8FF;
    --accent-dark: #0088C8;
    
    --success: #28A745;
    --warning: #FFC107;
    --danger: #DC3545;
    --info: #17A2B8;
    
    --light: #F8F9FA;
    --light-gray: #E9ECEF;
    --gray: #6C757D;
    --dark-gray: #495057;
    --dark: #212529;
    
    --white: #FFFFFF;
    --black: #000000;
    
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

/* 다크 모드 */
body.dark-mode {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --border-color: #444444;
}

body {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --border-color: #dee2e6;
}

/* ===== 기본 요소 스타일 ===== */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
    overflow-x: hidden;
}

/* 타이포그래피 */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--accent-light);
    text-decoration: underline;
}

/* ===== 레이아웃 ===== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-fluid {
    width: 100%;
    padding: 0 20px;
    margin: 0 auto;
}

/* Flexbox 유틸리티 */
.flex {
    display: flex;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.flex-column {
    display: flex;
    flex-direction: column;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.gap-4 { gap: 2rem; }

/* Grid 유틸리티 */
.grid {
    display: grid;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

/* 여백 유틸리티 */
.m-0 { margin: 0; }
.m-1 { margin: 0.5rem; }
.m-2 { margin: 1rem; }
.m-3 { margin: 1.5rem; }
.m-4 { margin: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mx-auto { margin: 0 auto; }
.my-auto { margin: auto 0; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

.pt-2 { padding-top: 1rem; }
.pt-3 { padding-top: 1.5rem; }
.pb-2 { padding-bottom: 1rem; }
.pb-3 { padding-bottom: 1.5rem; }

/* ===== 버튼 ===== */

button, .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
}

button:disabled, .btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* 버튼 색상 */
.btn-primary {
    background-color: var(--primary);
    color: var(--white);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-light);
    box-shadow: 0 4px 12px rgba(0, 31, 63, 0.3);
}

.btn-secondary {
    background-color: var(--secondary);
    color: var(--primary);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--secondary-light);
    box-shadow: 0 4px 12px rgba(0, 208, 132, 0.3);
}

.btn-accent {
    background-color: var(--accent);
    color: var(--white);
}

.btn-accent:hover:not(:disabled) {
    background-color: var(--accent-light);
    box-shadow: 0 4px 12px rgba(0, 168, 232, 0.3);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover:not(:disabled) {
    background-color: var(--primary);
    color: var(--white);
}

/* 버튼 크기 */
.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
    display: flex;
}

/* ===== 입력 요소 ===== */

input, textarea, select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition);
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 168, 232, 0.1);
}

input:disabled, textarea:disabled, select:disabled {
    background-color: var(--light-gray);
    cursor: not-allowed;
    opacity: 0.6;
}

input::placeholder, textarea::placeholder {
    color: var(--gray);
}

/* 체크박스 및 라디오 커스텀 */
.checkbox-wrapper, .radio-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    user-select: none;
}

input[type="checkbox"], input[type="radio"] {
    width: auto;
    cursor: pointer;
}

/* 폼 그룹 */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group.required label::after {
    content: ' *';
    color: var(--danger);
}

.form-error {
    color: var(--danger);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.form-success {
    color: var(--success);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* ===== 카드 ===== */

.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    transition: var(--transition);
}

.card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.card-header {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.card-body {
    margin-bottom: 1rem;
}

.card-footer {
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
}

/* ===== 테이블 ===== */

table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-secondary);
}

thead {
    background-color: var(--primary);
    color: var(--white);
}

th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

tbody tr:hover {
    background-color: var(--light-gray);
}

/* ===== 배지 ===== */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
}

.badge-primary { background-color: var(--primary); color: var(--white); }
.badge-secondary { background-color: var(--secondary); color: var(--primary); }
.badge-success { background-color: var(--success); color: var(--white); }
.badge-warning { background-color: var(--warning); color: var(--black); }
.badge-danger { background-color: var(--danger); color: var(--white); }
.badge-info { background-color: var(--info); color: var(--white); }

/* ===== 모달 ===== */

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 2rem;
    max-width: 600px;
    width: 90%;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    animation: slideUp 0.3s ease;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray);
    padding: 0;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    margin-bottom: 1.5rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

/* ===== 알림 ===== */

.alert {
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
    border-left: 4px solid;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.alert-primary { background-color: rgba(0, 31, 63, 0.1); border-color: var(--primary); color: var(--primary); }
.alert-secondary { background-color: rgba(0, 208, 132, 0.1); border-color: var(--secondary); color: var(--secondary-dark); }
.alert-success { background-color: rgba(40, 167, 69, 0.1); border-color: var(--success); color: var(--success); }
.alert-warning { background-color: rgba(255, 193, 7, 0.1); border-color: var(--warning); color: #856404; }
.alert-danger { background-color: rgba(220, 53, 69, 0.1); border-color: var(--danger); color: var(--danger); }
.alert-info { background-color: rgba(23, 162, 184, 0.1); border-color: var(--info); color: var(--info); }

.alert-close {
    margin-left: auto;
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: inherit;
    opacity: 0.7;
    padding: 0;
    transition: var(--transition);
}

.alert-close:hover {
    opacity: 1;
}

/* ===== 로딩 및 상태 ===== */

.spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid var(--light-gray);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

.spinner-lg {
    width: 60px;
    height: 60px;
    border-width: 6px;
}

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
}

/* ===== 애니메이션 ===== */

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

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

@keyframes slideRight {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in { animation: fadeIn 0.3s ease; }
.slide-up { animation: slideUp 0.3s ease; }
.slide-down { animation: slideDown 0.3s ease; }
.slide-left { animation: slideLeft 0.3s ease; }
.slide-right { animation: slideRight 0.3s ease; }

/* ===== 유틸리티 클래스 ===== */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.text-info { color: var(--info); }

.font-bold { font-weight: 700; }
.font-semi-bold { font-weight: 600; }
.font-normal { font-weight: 400; }

.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }

.hidden { display: none !important; }
.visible { display: block !important; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.rounded { border-radius: var(--border-radius); }
.rounded-sm { border-radius: 4px; }
.rounded-lg { border-radius: 12px; }
.rounded-full { border-radius: 9999px; }

.shadow { box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1); }
.shadow-md { box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15); }
.shadow-lg { box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2); }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }

/* ===== 반응형 디자인 (모바일 우선) ===== */

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    h4 { font-size: 1.125rem; }
    
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 95%;
        padding: 1.5rem;
    }
    
    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1rem; }
    
    button, .btn {
        padding: 0.625rem 1rem;
        font-size: 0.9375rem;
    }
    
    input, textarea, select {
        padding: 0.625rem 0.75rem;
        font-size: 16px; /* iOS zoom 방지 */
    }
    
    .table {
        font-size: 0.875rem;
    }
    
    th, td {
        padding: 0.75rem 0.5rem;
    }
}