/* ========================================
   프리미엄 흑백 UI 스타일
   생기부 마스터 - 리디자인
========================================= */

/* ========================================
   RESET & BASE
========================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 흑백 컬러 시스템 */
    --color-black: #000000;
    --color-dark-gray: #2a2a2a;
    --color-medium-gray: #666666;
    --color-light-gray: #e5e5e5;
    --color-lighter-gray: #f5f5f5;
    --color-white: #ffffff;
    
    /* 포인트 컬러 (최소화) */
    --color-accent: #1a1a1a;
    --color-accent-light: #f9f9f9;
    
    /* 타이포그래피 */
    --font-primary: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* 간격 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;
    
    /* 그림자 (절제된) */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* 애니메이션 */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-dark-gray);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========================================
   NAVIGATION - 미니멀 & 세련됨
========================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-light-gray);
    z-index: 1000;
    transition: var(--transition-base);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
}

.brand {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: var(--transition-fast);
}

.brand:hover {
    opacity: 0.8;
}

.brand-logo {
    height: 56px;
    width: auto;
    object-fit: contain;
    display: block;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-medium-gray);
    text-decoration: none;
    transition: var(--transition-fast);
    letter-spacing: -0.01em;
}

.nav-link:hover {
    color: var(--color-black);
}

.nav-cta {
    padding: 0.6rem 1.5rem;
    background-color: var(--color-black);
    color: var(--color-white);
    border-radius: var(--radius-md);
    font-weight: 600;
}

.nav-cta:hover {
    background-color: var(--color-dark-gray);
    color: var(--color-white);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background-color: var(--color-black);
    transition: var(--transition-base);
}

/* ========================================
   HERO SECTION - 큰 이미지 + 미니멀 오버레이
========================================= */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    max-height: 900px;
    margin-top: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-background img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.85) grayscale(10%);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.3));
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    color: var(--color-white);
    max-width: 900px;
    padding: 0 var(--spacing-md);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 1.2rem;
    font-weight: 400;
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.hero-badges {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-badge {
    padding: 0.5rem 1rem;
    background-color: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-white);
}

/* ========================================
   BUTTONS - 미니멀 & 세련됨
========================================= */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.9rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    cursor: pointer;
    border: none;
    letter-spacing: -0.01em;
}

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

.btn-primary:hover {
    background-color: var(--color-lighter-gray);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background-color: var(--color-white);
    color: var(--color-black);
}

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

.btn-dark:hover {
    background-color: var(--color-dark-gray);
}

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

.btn-outline:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

/* ========================================
   SECTIONS - 넓은 여백
========================================= */
.section {
    padding: var(--spacing-xxl) 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-medium-gray);
    line-height: 1.8;
}

/* ========================================
   SERVICES SECTION - 3 카드
========================================= */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.service-card {
    padding: var(--spacing-xl);
    background-color: var(--color-white);
    border: 1px solid var(--color-light-gray);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.service-card:hover {
    border-color: var(--color-medium-gray);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.service-card.featured {
    background-color: var(--color-lighter-gray);
    border-color: var(--color-dark-gray);
}

.service-number {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-medium-gray);
    margin-bottom: var(--spacing-sm);
}

.service-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.service-description {
    font-size: 1rem;
    color: var(--color-medium-gray);
    line-height: 1.7;
}

/* ========================================
   PLANS SECTION - 프리미엄 카드
========================================= */
.plans-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.plan-card {
    position: relative;
    padding: var(--spacing-xl);
    background-color: var(--color-white);
    border: 2px solid var(--color-light-gray);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.plan-card:hover {
    border-color: var(--color-medium-gray);
    box-shadow: var(--shadow-lg);
}

.plan-card.recommended {
    background-color: var(--color-black);
    color: var(--color-white);
    border-color: var(--color-black);
    transform: scale(1.05);
}

.plan-card.recommended .plan-name,
.plan-card.recommended .plan-price,
.plan-card.recommended .plan-tagline,
.plan-card.recommended .plan-description,
.plan-card.recommended .plan-features li {
    color: var(--color-white);
}

.plan-badge {
    position: absolute;
    top: -12px;
    right: var(--spacing-md);
    padding: 0.4rem 1rem;
    background-color: var(--color-white);
    color: var(--color-black);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.plan-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--spacing-xs);
}

.plan-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--spacing-xs);
}

.plan-tagline {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-medium-gray);
    margin-bottom: var(--spacing-sm);
}

.plan-description {
    font-size: 0.95rem;
    color: var(--color-medium-gray);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-light-gray);
}

.plan-card.recommended .plan-description {
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.plan-features {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.plan-features li {
    font-size: 0.95rem;
    color: var(--color-medium-gray);
    line-height: 2;
    padding-left: 1.5rem;
    position: relative;
}

.plan-features li::before {
    content: "·";
    position: absolute;
    left: 0;
    font-weight: 700;
}

.plan-button {
    width: 100%;
    padding: 0.9rem;
    text-align: center;
}

.plan-card.recommended .btn-outline {
    background-color: var(--color-white);
    color: var(--color-black);
    border-color: var(--color-white);
}

.plan-card.recommended .btn-outline:hover {
    background-color: var(--color-lighter-gray);
}

/* ========================================
   PROCESS SECTION - 타임라인
========================================= */
.process-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.process-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.process-number {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    background-color: var(--color-black);
    border-radius: 50%;
}

.process-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--spacing-sm);
}

.process-description {
    font-size: 1rem;
    color: var(--color-medium-gray);
    line-height: 1.7;
}

/* ========================================
   SAMPLES SECTION - 포트폴리오 스타일
========================================= */
.samples-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.sample-card {
    padding: var(--spacing-lg);
    background-color: var(--color-lighter-gray);
    border: 1px solid var(--color-light-gray);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.sample-card:hover {
    box-shadow: var(--shadow-md);
}

.sample-tags {
    display: flex;
    gap: 0.5rem;
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
}

.sample-tag {
    padding: 0.3rem 0.8rem;
    background-color: var(--color-white);
    color: var(--color-medium-gray);
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 20px;
}

.sample-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--spacing-sm);
}

.sample-description {
    font-size: 0.95rem;
    color: var(--color-medium-gray);
    line-height: 1.7;
}

/* ========================================
   FAQ SECTION - 아코디언
========================================= */
.faq-list {
    max-width: 900px;
    margin: var(--spacing-xl) auto 0;
}

.faq-item {
    border-bottom: 1px solid var(--color-light-gray);
}

.faq-question {
    width: 100%;
    padding: var(--spacing-md) 0;
    background: none;
    border: none;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-black);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition-fast);
}

.faq-question:hover {
    color: var(--color-medium-gray);
}

.faq-icon {
    font-size: 1.2rem;
    transition: var(--transition-base);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer-content {
    padding-bottom: var(--spacing-md);
    font-size: 1rem;
    color: var(--color-medium-gray);
    line-height: 1.8;
}

/* ========================================
   APPLY SECTION - 미니멀 폼
========================================= */
.apply-form {
    max-width: 800px;
    margin: var(--spacing-xl) auto 0;
    padding: var(--spacing-xl);
    background-color: var(--color-lighter-gray);
    border-radius: var(--radius-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-black);
    margin-bottom: var(--spacing-xs);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.9rem;
    font-size: 1rem;
    font-family: var(--font-primary);
    color: var(--color-black);
    background-color: var(--color-white);
    border: 1px solid var(--color-light-gray);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

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

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-submit {
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
}

/* 플랜 선택 */
.plan-selection-group {
    margin-bottom: var(--spacing-lg);
}

.plan-selection {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.plan-option {
    position: relative;
    display: block;
    cursor: pointer;
}

.plan-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.plan-option-content {
    position: relative;
    padding: var(--spacing-md);
    background-color: var(--color-white);
    border: 2px solid var(--color-light-gray);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.plan-option:hover .plan-option-content {
    border-color: var(--color-dark-gray);
    box-shadow: var(--shadow-md);
}

.plan-option input[type="radio"]:checked + .plan-option-content {
    border-color: var(--color-black);
    background-color: #fafafa;
    box-shadow: var(--shadow-md);
}

.plan-option input[type="radio"]:checked + .plan-option-content::before {
    content: '✓';
    position: absolute;
    top: 12px;
    right: 12px;
    width: 24px;
    height: 24px;
    background-color: var(--color-black);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
}

.plan-option-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-black);
    color: var(--color-white);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 12px;
}

.plan-option-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: var(--spacing-xs);
}

.plan-option-name {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-black);
}

.plan-option-price {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-black);
}

.plan-option-description {
    font-size: 0.9rem;
    color: var(--color-medium-gray);
    line-height: 1.5;
    margin: 0;
}

.recommended-option .plan-option-content {
    padding-top: calc(var(--spacing-md) + 8px);
}

/* ========================================
   FLOATING CONTACT WIDGET - 다채널 문의
========================================= */
.floating-widget {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
}

.floating-button {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--color-black) 0%, var(--color-dark-gray) 100%);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
}

.floating-button:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.2);
}

.floating-text {
    font-size: 0.65rem;
    font-weight: 600;
    margin-top: -2px;
}

.floating-menu {
    position: absolute;
    bottom: 80px;
    right: 0;
    width: 280px;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
    transition: all var(--transition-base);
}

.floating-menu.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: all;
}

.floating-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-black);
    color: var(--color-white);
    font-weight: 600;
    font-size: 0.95rem;
}

.close-menu {
    background: none;
    border: none;
    color: var(--color-white);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.close-menu:hover {
    opacity: 0.7;
}

.floating-menu-content {
    padding: var(--spacing-xs);
}

.contact-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--color-dark-gray);
    transition: var(--transition-fast);
    margin-bottom: var(--spacing-xs);
}

.contact-option:last-child {
    margin-bottom: 0;
}

.contact-option:hover {
    background-color: var(--color-lighter-gray);
}

.contact-option i {
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-lighter-gray);
    border-radius: var(--radius-md);
    color: var(--color-black);
}

.contact-option:hover i {
    background-color: var(--color-black);
    color: var(--color-white);
}

.contact-title {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-black);
    margin-bottom: 2px;
}

.contact-detail {
    font-size: 0.8rem;
    color: var(--color-medium-gray);
}

/* ========================================
   FOOTER - 미니멀
========================================= */
.footer {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-lighter-gray);
    border-top: 1px solid var(--color-light-gray);
}

.footer-content {
    text-align: center;
    color: var(--color-medium-gray);
}

.footer-logo-section {
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    height: 50px;
    width: auto;
    margin: 0 auto var(--spacing-sm);
    display: block;
}

.footer-brand {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--spacing-xs);
}

.footer-tagline {
    font-size: 0.9rem;
    color: var(--color-medium-gray);
    margin-bottom: var(--spacing-md);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.footer-link {
    font-size: 0.9rem;
    color: var(--color-medium-gray);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-black);
}

.footer-copyright {
    font-size: 0.9rem;
    color: var(--color-medium-gray);
}

/* ========================================
   RESPONSIVE - 모바일 최적화
========================================= */
@media (max-width: 768px) {
    /* 네비게이션 */
    .brand-logo {
        height: 32px;
    }
    
    .brand-text {
        font-size: 1.1rem;
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 60px);
        flex-direction: column;
        background-color: var(--color-white);
        padding: var(--spacing-lg);
        gap: var(--spacing-sm);
        transition: var(--transition-base);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        width: 100%;
        padding: var(--spacing-sm);
        text-align: center;
    }
    
    /* 히어로 */
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    /* 섹션 */
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    /* 그리드 */
    .services-grid,
    .plans-grid,
    .process-grid,
    .samples-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .plan-card.recommended {
        transform: none;
    }
    
    /* 플로팅 위젯 */
    .floating-widget {
        bottom: 20px;
        right: 20px;
    }
    
    .floating-button {
        width: 50px;
        height: 50px;
        font-size: 1.3rem;
    }
    
    .floating-text {
        font-size: 0.6rem;
    }
    
    .floating-menu {
        width: calc(100vw - 40px);
        max-width: 280px;
        bottom: 70px;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .services-grid,
    .plans-grid,
    .process-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}