/* ================================================
   이프로 출장세차 — Style Sheet
   ================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;700;900&display=swap');

/* --- CSS Custom Properties --- */
:root {
  --color-primary: #1A3C5E;
  --color-primary-light: #2A5F8F;
  --color-accent: #E8792B;
  --color-accent-light: #F5A86C;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F4F6F8;
  --color-bg-dark: #0F1F30;
  --color-text: #1C1C2B;
  --color-text-light: #5A6577;
  --color-text-inverse: #FFFFFF;
  --color-border: #DCE2EA;

  --font-main: 'Noto Sans KR', sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.1);
  --transition: 0.3s ease;
}

/* --- Reset --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-sm);
}

/* --- Header --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--color-primary);
  letter-spacing: -0.5px;
}

.logo span {
  color: var(--color-accent);
}

.nav-list {
  display: flex;
  gap: var(--space-md);
}

.nav-list a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  position: relative;
  transition: color var(--transition);
}

.nav-list a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.nav-list a:hover {
  color: var(--color-primary);
}

.nav-list a:hover::after {
  width: 100%;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition);
}

/* --- Hero --- */
.hero {
  padding: calc(70px + var(--space-xl)) 0 var(--space-xl);
  background: linear-gradient(155deg, var(--color-bg-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
  color: var(--color-text-inverse);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  bottom: -40%;
  left: -15%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(232, 121, 43, 0.12) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-badge {
  display: inline-block;
  background: rgba(232, 121, 43, 0.2);
  color: var(--color-accent-light);
  padding: 0.4rem 1.2rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: var(--space-sm);
  border: 1px solid rgba(232, 121, 43, 0.3);
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: var(--space-sm);
  letter-spacing: -1px;
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.88;
  max-width: 530px;
  margin: 0 auto var(--space-md);
  line-height: 1.6;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.8rem;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 700;
  font-family: var(--font-main);
  cursor: pointer;
  border: none;
  transition: transform var(--transition), box-shadow var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
  border-color: #fff;
}

/* --- Section Common --- */
.section {
  padding: var(--space-xl) 0;
}

.section-title {
  font-size: 1.8rem;
  font-weight: 900;
  text-align: center;
  margin-bottom: 0.5rem;
  letter-spacing: -0.5px;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
  font-size: 1rem;
}

/* --- About --- */
.about {
  background: var(--color-bg-alt);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.about-text h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}

.about-text p {
  color: var(--color-text-light);
  margin-bottom: var(--space-sm);
  line-height: 1.8;
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

.highlight-item {
  background: var(--color-bg);
  padding: var(--space-md);
  border-radius: var(--radius);
  text-align: center;
  box-shadow: var(--shadow);
  border-top: 3px solid var(--color-accent);
}

.highlight-icon {
  font-size: 2rem;
  margin-bottom: var(--space-xs);
}

.highlight-item strong {
  display: block;
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.highlight-item span {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* --- Services --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.service-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-md);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.service-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
}

.service-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--color-primary);
}

.service-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.service-tag {
  display: inline-block;
  margin-top: var(--space-sm);
  padding: 0.3rem 0.8rem;
  background: var(--color-bg-alt);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-primary);
}

/* --- Process --- */
.process {
  background: var(--color-bg-alt);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

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

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  background: var(--color-accent);
  color: #fff;
  font-weight: 900;
  font-size: 1.2rem;
  border-radius: 50%;
  margin-bottom: var(--space-sm);
}

.process-step h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.process-step p {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}

.contact-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--color-bg-alt);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.contact-item strong {
  display: block;
  margin-bottom: 2px;
}

.contact-item span,
.contact-item a {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

.contact-item a:hover {
  color: var(--color-accent);
}

.contact-notice {
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  padding: var(--space-md);
  border: 1px solid var(--color-border);
}

.contact-notice h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}

.contact-notice p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* --- CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-bg-dark) 100%);
  color: var(--color-text-inverse);
  text-align: center;
  padding: var(--space-lg) 0;
}

.cta-banner h2 {
  font-size: 1.8rem;
  font-weight: 900;
  margin-bottom: var(--space-xs);
}

.cta-banner p {
  opacity: 0.85;
  margin-bottom: var(--space-md);
}

/* --- Footer --- */
.site-footer {
  background: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.6);
  padding: var(--space-md) 0;
  text-align: center;
  font-size: 0.85rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.site-footer a {
  color: rgba(255, 255, 255, 0.6);
}

.site-footer a:hover {
  color: var(--color-accent-light);
}

/* --- Fade-in Animation --- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive: Tablet (768px) --- */
@media (max-width: 768px) {
  .nav-list {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: var(--color-bg);
    flex-direction: column;
    padding: var(--space-sm) 0;
    box-shadow: var(--shadow);
  }

  .nav-list.active {
    display: flex;
  }

  .nav-list li {
    text-align: center;
    padding: var(--space-xs) 0;
  }

  .hamburger {
    display: flex;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .services-grid {
    grid-template-columns: 1fr 1fr;
  }

  .process-steps {
    grid-template-columns: 1fr 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Responsive: Mobile (480px) --- */
@media (max-width: 480px) {
  .hero {
    padding: calc(70px + var(--space-lg)) 0 var(--space-lg);
  }

  .hero h1 {
    font-size: 1.6rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .section {
    padding: var(--space-lg) 0;
  }

  .section-title {
    font-size: 1.4rem;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .process-steps {
    grid-template-columns: 1fr;
  }

  .about-highlights {
    grid-template-columns: 1fr;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
}