/**
 * 공통 스타일 - 모든 페이지에서 사용
 * 생성일: 2025-10-12
 */

/* ==================== CSS 변수 정의 ==================== */
:root {
    /* 색상 팔레트 */
    --color-primary: #0071e3;
    --color-primary-hover: #0077ed;
    --color-primary-light: #0ea5e9;
    --color-primary-gradient: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%);

    --color-secondary: #667eea;
    --color-secondary-dark: #764ba2;
    --color-secondary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

    --color-success: #34c759;
    --color-error: #ff3b30;
    --color-warning: #ffc107;
    --color-warning-bg: #ffeaa7;
    --color-warning-text: #856404;

    /* 텍스트 색상 */
    --color-text-primary: #1d1d1f;
    --color-text-secondary: #86868b;
    --color-text-tertiary: #6e6e73;
    --color-text-muted: #64748b;

    /* 배경 색상 */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f5f5f7;
    --color-bg-tertiary: #f8fafc;
    --color-bg-input: #f5f5f7;

    /* 테두리 색상 */
    --color-border-light: #e5e7eb;
    --color-border-medium: #d2d2d7;
    --color-border-dark: #d1d1d6;

    /* 폰트 */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Courier New', monospace;

    /* 간격 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 20px;
    --spacing-2xl: 24px;
    --spacing-3xl: 30px;
    --spacing-4xl: 40px;

    /* 테두리 반경 */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    --radius-2xl: 16px;

    /* 그림자 */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 0 2px 10px rgba(0,0,0,0.05);
    --shadow-lg: 0 4px 20px rgba(0,0,0,0.15);

    /* 전환 */
    --transition-fast: 0.2s;
    --transition-normal: 0.3s;
}

/* ==================== 기본 리셋 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg-secondary);
    color: var(--color-text-primary);
    line-height: 1.5;
}

/* ==================== 레이아웃 ==================== */
.container {
    max-width: 500px;
    margin: 0 auto;
    padding: 16px;
    min-height: 100vh;
}

/* ==================== 카드 ==================== */
.card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-md);
}

/* ==================== 버튼 스타일 ==================== */
.button {
    padding: 8px 14px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    font-family: var(--font-family);
}

.button-primary {
    background: var(--color-primary-gradient);
    color: white;
}

.button-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}

.button-secondary {
    background: #f1f5f9;
    color: #475569;
}

.button-secondary:hover {
    background: #e2e8f0;
}

.button-small {
    padding: 8px 16px;
    font-size: 14px;
}

.button-outline {
    background: transparent;
    border: 1px solid var(--color-border-dark);
}

.button:disabled {
    background-color: var(--color-text-secondary);
    cursor: not-allowed;
    opacity: 0.6;
}

/* ==================== 폼 스타일 ==================== */
.form-group {
    margin-bottom: 0;
    padding: 14px 0;
    border-bottom: 1px solid var(--color-border-light);
}

.form-group:last-child {
    border-bottom: none;
}

.form-label {
    display: block;
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--color-text-primary);
}

.required {
    color: var(--color-error);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 12px 14px;
    font-size: 16px;
    border: 1px solid var(--color-border-medium);
    border-radius: var(--radius-lg);
    background-color: var(--color-bg-input);
    transition: all var(--transition-fast);
    font-family: var(--font-family);
    -webkit-appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: var(--color-bg-primary);
}

.form-select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg width='14' height='8' viewBox='0 0 14 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L7 7L13 1' stroke='%23000000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

.form-textarea {
    min-height: 100px;
    resize: vertical;
}

/* 읽기 전용 필드 */
.form-input[readonly],
.form-input.computed-field {
    background-color: #e8f0fe;
    color: #1967d2;
    font-weight: 600;
    cursor: not-allowed;
    border: 2px solid #1967d2;
}

/* ==================== 메시지 스타일 ==================== */
.error-message {
    color: var(--color-error);
    font-size: 14px;
    margin-top: var(--spacing-xs);
}

.success-message {
    color: var(--color-success);
    font-size: 14px;
    margin-top: var(--spacing-xs);
}

.field-help-text {
    margin-top: 6px;
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.5;
    display: flex;
    align-items: flex-start;
    gap: 4px;
}

.field-help-text::before {
    content: "ℹ️";
    flex-shrink: 0;
}

/* ==================== 배지 스타일 ==================== */
.badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 500;
}

.badge-success {
    background: #34c75920;
    color: var(--color-success);
}

.badge-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning-text);
}

.badge-primary {
    background: #0071e320;
    color: var(--color-primary);
}

/* ==================== 로딩 애니메이션 ==================== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 10px;
    vertical-align: middle;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== 반응형: 태블릿 (768px ~ 1023px) ==================== */
@media (min-width: 768px) and (max-width: 1023px) {
    .container {
        max-width: 600px;
        padding: 30px 20px;
    }

    .card {
        padding: 30px;
    }
}

/* ==================== 반응형: PC (1024px 이상) ==================== */
@media (min-width: 1024px) {
    .container {
        max-width: 800px;
        padding: 40px 20px;
    }

    .card {
        padding: 40px;
    }

    .form-group {
        margin-bottom: 25px;
    }

    .form-label {
        font-size: 18px;
    }

    .form-input,
    .form-select,
    .form-textarea {
        font-size: 18px;
        padding: 16px 18px;
    }
}

/* ==================== 반응형: 대형 화면 (1920px 이상) ==================== */
@media (min-width: 1920px) {
    .container {
        padding: 50px 60px;
    }
}

/* ==================== 유틸리티 클래스 ==================== */
.hidden {
    display: none !important;
}

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

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

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

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }