/* 메인 스타일 CSS - 골든웍 에어컨 전문 업체 (리뉴얼) */

/* 공통 변수 - 새로운 디자인 */
:root {
    /* 메인 컬러 팔레트 */
    --primary-blue: #1e3a8a;
    --secondary-blue: #3b82f6;
    --accent-blue: #06b6d4;
    --light-blue: #f0f9ff;
    --dark-blue: #1e293b;
    
    /* 그라데이션 */
    --gradient-primary: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 50%, #06b6d4 100%);
    --gradient-light: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    --gradient-hero: linear-gradient(135deg, rgba(30, 58, 138, 0.95) 0%, rgba(59, 130, 246, 0.9) 100%);
    
    /* 중성 컬러 */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* 텍스트 컬러 */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    
    /* 액센트 컬러 */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* 그림자 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-blue: 0 10px 25px -5px rgba(30, 58, 138, 0.25);
    
    /* 테두리 */
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
}

/* 기본 스타일 */
body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--white);
    font-weight: 400;
    font-size: 16px;
    letter-spacing: -0.01em;
}

/* 헤딩 스타일 */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.025em;
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

/* 컨테이너 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* 헤더 스타일 */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo a {
    text-decoration: none !important;
    color: inherit !important;
    display: flex !important;
    align-items: center !important;
    gap: 1rem !important;
    transition: opacity 0.3s ease;
}

.logo a:hover {
    opacity: 0.8;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo img {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 800;
    background: var(--gradient-primary);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
}

.logo-sub {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-top: 2px;
    -webkit-text-fill-color: var(--text-secondary);
}

/* 네비게이션 */
.nav-toggle {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    color: var(--primary-blue);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 8px;
}

.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--primary-blue);
    border-radius: 1px;
    transition: all 0.3s ease;
}

.nav-menu {
    display: flex;
    gap: 0.25rem;
}

.nav-menu a {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-lg);
    transition: all 0.3s ease;
    position: relative;
    white-space: nowrap;
}

.nav-menu a:hover {
    background: var(--light-blue);
    color: var(--primary-blue);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-blue);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-menu a:hover::after {
    width: 70%;
}

/* 메인 비주얼 */
.hero {
    background: var(--gradient-light);
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><pattern id="grid" width="50" height="50" patternUnits="userSpaceOnUse"><path d="M 50 0 L 0 0 0 50" fill="none" stroke="%23e2e8f0" stroke-width="1" opacity="0.3"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.6;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1.5rem;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-weight: 500;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-phone {
    margin: 3rem 0 2rem;
}

.phone-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: var(--gradient-primary);
    color: var(--white);
    padding: 1.25rem 2.5rem;
    border-radius: var(--border-radius-xl);
    font-size: 1.5rem;
    font-weight: 700;
    box-shadow: var(--shadow-blue);
    transition: all 0.3s ease;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.phone-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.phone-btn:hover::before {
    left: 100%;
}

.phone-btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-xl), 0 0 30px rgba(30, 58, 138, 0.3);
}

.phone-icon {
    width: 28px;
    height: 28px;
    filter: brightness(0) invert(1); /* 흰색으로 변환 */
    animation: ring 2s infinite ease-in-out;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    padding: 6px;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

@keyframes ring {
    0%, 20%, 40%, 60%, 80%, 100% {
        transform: rotate(0deg);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: rotate(10deg);
    }
}