/* Plus Precision Engineering - Premium Technical Styles */

:root {
  --color-primary:        #246BFD;
  --color-primary-hover:  #0056FF;
  --color-accent:         #00C9A7;
  
  --color-bg:             #FFFFFF;
  --color-surface:        #F8FAFC;
  --color-surface-2:      #F1F5F9;
  --color-divider:        #E2E8F0;
  
  --color-text:           #0F172A;
  --color-text-muted:     #475569;
  --color-text-faint:     #94A3B8;
  --color-navy:           #0F172A;

  --font-display: 'General Sans', 'Pretendard', sans-serif;
  --font-body:    'Pretendard', 'General Sans', sans-serif;

  /* Fluid Typography optimized for High-DPI Mobile & Desktop */
  --text-xs:   clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.85rem + 0.1vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.15vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1.05rem + 0.3vw, 1.375rem);
  --text-xl:   clamp(1.5rem,   1.3rem + 1vw, 2rem);
  --text-2xl:  clamp(2rem,     1.5rem + 2.5vw, 3.5rem);
  --text-hero: clamp(2.25rem,  1.5rem + 4vw, 5rem);

  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-4:  1rem;
  --space-8:  2rem;
  --space-12: 2rem;
  --space-16: 3rem;
  --space-24: 5rem;
  --space-32: 8rem;
  --section-py: clamp(var(--space-8), 8vw, var(--space-16));

  /* Safe Areas for Modern Mobile */
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; }
body, h1, h2, h3, p, ul { margin: 0; padding: 0; }
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  padding-bottom: var(--safe-bottom);
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* Layout */
.container {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: clamp(1.5rem, 5vw, 4rem);
}

/* Components */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.8em 1.8em;
  background: var(--color-primary);
  color: white;
  font-weight: 700;
  border-radius: 99px;
  transition: all 0.2s ease;
}
.btn-primary:hover { 
  background: var(--color-primary-hover); 
  transform: translateY(-2px);
  box-shadow: 0 10px 20px color-mix(in srgb, var(--color-primary), transparent 80%);
}

.btn-nav-cta {
  border: 1.5px solid var(--color-primary);
  background: transparent;
  color: var(--color-primary);
  padding: 0.6em 1.4em;
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: 99px;
  transition: all 0.2s ease;
}
.btn-nav-cta:hover {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 4px 12px color-mix(in srgb, var(--color-primary), transparent 85%);
}

.card {
  background: var(--color-surface);
  border-radius: 24px;
  padding: var(--space-8);
  border: 1px solid var(--color-divider);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.card:hover {
  transform: translateY(-8px);
  background: var(--color-bg);
  border-color: var(--color-primary);
  box-shadow: 0 20px 40px color-mix(in srgb, var(--color-navy), transparent 95%);
}

.badge-speed {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent), transparent 90%);
  padding: 4px 12px;
  border-radius: 99px;
  margin-bottom: var(--space-4);
}

.spec-item {
  background: white;
  padding: var(--space-6) var(--space-4);
  border-radius: 20px;
  border: 1px solid var(--color-divider);
  box-shadow: 0 8px 20px rgba(0,0,0,0.02);
  text-align: center;
}

/* Modal for Map Selection */
.map-selector-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.map-selector-overlay.active { display: flex; }
.map-selector-content {
  background: white;
  border-radius: 24px;
  padding: 32px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.2);
}
.map-selector-content h3 { font-size: 1.1rem; font-weight: 800; margin-bottom: 20px; text-align: center; color: var(--color-navy); }
.map-links { display: grid; gap: 12px; }
.map-link {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: var(--color-surface);
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: all 0.2s;
  border: 1px solid var(--color-divider);
}
.map-link:hover { background: var(--color-primary); color: white; border-color: var(--color-primary); }
.close-map-selector {
  margin-top: 20px;
  width: 100%;
  padding: 12px;
  background: transparent;
  border: 1px solid var(--color-divider);
  border-radius: 12px;
  font-weight: 600;
  color: var(--color-text-muted);
  cursor: pointer;
}

/* Header & Nav */
header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1000;
  border-bottom: 1px solid var(--color-divider);
  padding-top: var(--safe-top);
}
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}
@media (min-width: 1024px) {
  .nav { height: 88px; }
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-logo .logo-icon { font-size: 1.5rem; color: var(--color-primary); }
.nav-logo .logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.nav-logo .logo-text .ko { font-size: 1.15rem; font-weight: 800; color: var(--color-text); letter-spacing: -0.02em; }
.nav-logo .logo-text .en { font-family: var(--font-display); font-size: 0.6rem; font-weight: 700; color: var(--color-primary); letter-spacing: 0.2em; margin-top: 2px; }

/* Mobile Menu Toggle */
.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  padding: 10px;
  margin-right: -10px;
  z-index: 1001;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.menu-toggle.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

.nav-links {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  height: 100vh;
  background: white;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  transform: translateX(100%);
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
}
.nav-links.active { transform: translateX(0); }
.nav-links a:not(.btn-nav-cta) { font-size: 1.5rem; font-weight: 700; color: var(--color-text); }

@media (min-width: 1024px) {
  .menu-toggle { display: none; }
  .nav-links {
    position: static;
    width: auto;
    height: auto;
    background: transparent;
    flex-direction: row;
    gap: var(--space-8);
    transform: none;
  }
  .nav-links a:not(.btn-nav-cta) { font-size: 0.95rem; font-weight: 600; color: var(--color-text-muted); }
  .nav-links a:hover { color: var(--color-primary); }
}

/* Sections */
section { padding-block: var(--section-py); }
@media (min-width: 1024px) {
  section { padding-block: clamp(var(--space-12), 6vw, var(--space-24)); }
}
.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-4);
  letter-spacing: -0.03em;
}
.section-desc { color: var(--color-text-muted); margin-bottom: var(--space-12); max-width: 600px; }

/* HERO */
.section-hero {
  padding-top: calc(var(--section-py) + 90px);
  min-height: 80vh;
  display: flex;
  align-items: center;
  background: radial-gradient(circle at 90% 10%, color-mix(in srgb, var(--color-primary), transparent 95%), transparent 40%);
}
@media (min-width: 1024px) {
  .section-hero { min-height: 70vh; padding-top: 140px; padding-bottom: 60px; }
}
.hero-heading {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.04em;
  margin-bottom: var(--space-8);
}
.hero-heading span { color: var(--color-primary); }
.hero-sub { font-size: var(--text-lg); color: var(--color-text-muted); margin-bottom: var(--space-12); max-width: 700px; }

.macro-bg {
  position: absolute;
  right: 0;
  top: 20%;
  width: 40%;
  height: 60%;
  opacity: 0.1;
  pointer-events: none;
  background-image: repeating-linear-gradient(0deg, transparent, transparent 1px, var(--color-primary) 1px, var(--color-primary) 2px),
                    repeating-linear-gradient(90deg, transparent, transparent 1px, var(--color-primary) 1px, var(--color-primary) 2px);
  background-size: 40px 40px;
  mask-image: radial-gradient(circle at center, black, transparent);
}

/* PROCESS FLOW */
.process-flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  position: relative;
}
.process-step {
  text-align: center;
  position: relative;
  padding: var(--space-8) var(--space-4);
  background: var(--color-surface);
  border-radius: 20px;
  border: 1px solid var(--color-divider);
}
.process-step::after {
  content: "→";
  position: absolute;
  right: -15px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-divider);
  font-size: 1.5rem;
  display: none;
}
@media (min-width: 1024px) {
  .process-step:not(:last-child)::after { display: block; }
}
.step-num { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 800; color: color-mix(in srgb, var(--color-primary), transparent 80%); position: absolute; top: 10px; left: 50%; transform: translateX(-50%); }
.process-step h3 { font-size: var(--text-base); font-weight: 700; margin-top: var(--space-4); }

/* QC INFOGRAPHIC */
.section-qc { padding-block: var(--section-py); padding-bottom: 0; }
.qc-card {
  background: var(--color-surface);
  border-radius: 24px;
  padding: var(--space-6) var(--space-4);
  border: 1px solid var(--color-divider);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.qc-card:hover { transform: translateY(-8px); box-shadow: 0 20px 40px rgba(0,0,0,0.03); }
@media (min-width: 1024px) {
  .qc-card { padding: var(--space-12); border-radius: 32px; }
}
.qc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: center;
}
@media (min-width: 1024px) {
  .qc-grid { grid-template-columns: 1.2fr 1fr; gap: var(--space-12); }
}
.qc-visual { display: flex; align-items: center; justify-content: center; }
.qc-img-main { width: 100%; height: auto; aspect-ratio: 16/10; object-fit: cover; border-radius: 20px; box-shadow: 0 20px 40px rgba(0,0,0,0.1); }
@media (min-width: 1024px) { .qc-img-main { width: 95%; height: 320px; border-radius: 24px; } }

.qc-badge { display: inline-block; padding: 4px 12px; background: white; color: var(--color-primary); border: 1px solid var(--color-primary); border-radius: 99px; font-size: 0.75rem; font-weight: 700; margin-bottom: var(--space-4); text-transform: uppercase; letter-spacing: 0.05em; }

.qc-specs { 
  display: grid; 
  grid-template-columns: 1fr; 
  gap: 12px; 
  margin-top: var(--space-8); 
}
@media (min-width: 480px) { .qc-specs { grid-template-columns: repeat(3, 1fr); } }

.spec-item {
  background: white;
  padding: var(--space-4);
  border-radius: 16px;
  border: 1px solid var(--color-divider);
  box-shadow: 0 8px 20px rgba(0,0,0,0.02);
  text-align: center;
}
.spec-item label { display: block; font-size: 0.7rem; font-weight: 700; color: var(--color-text-faint); text-transform: uppercase; margin-bottom: 4px; letter-spacing: 0.05em; }
.spec-item strong { display: block; font-family: var(--font-display); font-size: 1rem; color: var(--color-primary); line-height: 1.2; word-break: keep-all; }

@media (min-width: 1024px) {
  .spec-item { padding: var(--space-6) var(--space-4); border-radius: 20px; }
  .spec-item label { font-size: var(--text-xs); margin-bottom: 8px; }
  .spec-item strong { font-size: var(--text-base); }
}
@media (min-width: 1280px) { .spec-item strong { font-size: var(--text-lg); } }

/* HISTORY */
.history-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
}
.history-card { 
  padding: var(--space-8); 
  min-height: 140px; 
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.history-card:hover { transform: translateY(-4px); border-color: var(--color-primary); }
.history-card .date { font-weight: 800; color: var(--color-primary); font-size: var(--text-sm); margin-bottom: var(--space-2); }
.history-card h3 { font-size: var(--text-base); line-height: 1.4; word-break: keep-all; }

/* BUSINESS & FACILITY */
.business-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-6);
}
.business-card { padding: var(--space-12); text-align: center; }
.business-card i { color: var(--color-primary); margin-bottom: var(--space-6); display: block; margin-inline: auto; }
.business-card h3 { font-size: var(--text-xl); font-weight: 700; margin-bottom: var(--space-4); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: var(--space-6); }
.tag { font-size: var(--text-xs); padding: 4px 10px; background: var(--color-surface-2); border-radius: 4px; color: var(--color-text-muted); font-weight: 600; }

.facility-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}
@media (min-width: 768px) { .facility-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1024px) { .facility-grid { grid-template-columns: repeat(5, 1fr); } }
.facility-item { 
  background: var(--color-surface); 
  padding: var(--space-12) var(--space-4); 
  border-radius: 20px; 
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid var(--color-divider);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.facility-item:hover { border-color: var(--color-primary); background: white; transform: translateY(-6px); box-shadow: 0 15px 30px rgba(36,107,253,0.08); }
.facility-item strong { display: block; font-size: var(--text-sm); margin-top: var(--space-2); color: var(--color-navy); }

/* R&D SECTION */
.section-rd { padding-block: var(--section-py); padding-top: 0; }
.rd-card {
  background: var(--color-surface);
  border-radius: 24px;
  padding: var(--space-6) var(--space-4);
  border: 1px solid var(--color-divider);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.rd-card:hover { transform: translateY(-8px); box-shadow: 0 20px 40px rgba(0,0,0,0.03); }
@media (min-width: 1024px) {
  .rd-card { padding: var(--space-12); border-radius: 32px; }
}
.rd-inner { display: grid; grid-template-columns: 1fr; gap: var(--space-8); align-items: center; }
@media (min-width: 1024px) { .rd-inner { grid-template-columns: 1fr 1fr; gap: var(--space-12); } }

.rd-visual { position: relative; width: 100%; display: flex; align-items: center; justify-content: center; }
.rd-img-main { width: 100%; height: auto; aspect-ratio: 16/10; object-fit: cover; border-radius: 20px; box-shadow: 0 20px 40px rgba(0,0,0,0.1); z-index: 1; }
@media (min-width: 1024px) { .rd-img-main { width: 90%; height: 320px; border-radius: 24px; } }

.rd-img-cert { position: absolute; bottom: -10px; right: 0; width: 100px; border-radius: 12px; z-index: 2; border: 2px solid white; background: white; box-shadow: 0 8px 16px rgba(0,0,0,0.1); }
@media (min-width: 1024px) { .rd-img-cert { width: 140px; bottom: 20px; } }

.rd-stats { 
  display: grid; 
  grid-template-columns: 1fr; 
  gap: 12px; 
  margin-top: var(--space-8); 
}
@media (min-width: 480px) { .rd-stats { grid-template-columns: repeat(3, 1fr); } }

.rd-stats div {
  background: white;
  padding: var(--space-4);
  border-radius: 16px;
  border: 1px solid var(--color-divider);
  text-align: center;
}
.rd-stats strong { display: block; font-family: var(--font-display); font-size: 1.25rem; color: var(--color-primary); line-height: 1; margin-bottom: 4px; }
.rd-stats span { display: block; font-size: 0.7rem; color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.05em; font-weight: 700; }

@media (min-width: 1024px) {
  .rd-stats strong { font-size: 1.5rem; }
  .rd-stats span { font-size: var(--text-xs); }
}
.rd-badge { display: inline-block; padding: 4px 12px; background: white; color: var(--color-primary); border: 1px solid var(--color-primary); border-radius: 99px; font-size: 0.75rem; font-weight: 700; margin-bottom: var(--space-4); }

/* CONTACT */
.contact-box { background: var(--color-surface); border-radius: 32px; padding: var(--space-12); text-align: center; border: 1px solid var(--color-divider); }
.contact-info { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: var(--space-8); margin-bottom: var(--space-12); }
.info-item p { font-size: var(--text-base); font-weight: 700; }

/* Contact Tiles */
.contact-tiles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: var(--space-8);
}
@media (min-width: 768px) {
  .contact-tiles { grid-template-columns: repeat(2, 1fr); }
}
.contact-tile {
  background: white;
  border: 1px solid var(--color-divider);
  border-radius: 20px;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all 0.3s ease;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 4px 12px rgba(0,0,0,0.03);
}
.contact-tile:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.05);
}
.contact-tile i { color: var(--color-primary); margin-bottom: 16px; width: 28px; height: 28px; }
.contact-tile strong { font-size: 0.875rem; color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 12px; }
.contact-tile span { font-size: 1.125rem; font-weight: 700; color: var(--color-navy); word-break: break-all; }

.address-tile { grid-column: 1 / -1; }
@media (min-width: 1024px) {
  .address-tile { grid-column: auto; }
}

.nav-app-links-inline {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  width: 100%;
  justify-content: center;
}
@media (min-width: 1024px) {
  .nav-app-links-inline { display: none; }
}
.nav-inline-btn {
  flex: 1;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--color-divider);
  background: var(--color-surface);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}
.nav-inline-btn:hover { background: var(--color-primary); color: white; border-color: var(--color-primary); }
.nav-inline-btn.tmap:hover { background: #FF5000; border-color: #FF5000; }
.nav-inline-btn.naver:hover { background: #03C75A; border-color: #03C75A; }
.nav-inline-btn.kakao:hover { background: #FEE500; color: #3C1E1E; border-color: #FEE500; }

/* Footer */
footer { 
  padding-block: var(--space-8); 
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider); 
  font-size: var(--text-xs); 
  color: var(--color-text-muted); 
}
.footer-inner { 
  display: flex; 
  flex-direction: column;
  gap: var(--space-8);
}
.footer-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
@media (min-width: 1024px) {
  .footer-info { flex-direction: row; justify-content: space-between; align-items: center; }
}
.footer-logo { 
  display: flex; 
  flex-direction: column; 
  line-height: 1.1; 
  background: white;
  padding: 24px 32px;
  border-radius: 20px;
  border: 1px solid var(--color-divider);
  min-width: 240px;
  text-align: center;
}
.footer-logo .ko { font-size: 1.5rem; font-weight: 800; color: var(--color-navy); letter-spacing: -0.02em; }
.footer-logo .en { font-size: 0.75rem; font-weight: 700; color: var(--color-primary); letter-spacing: 0.2em; margin-top: 4px; }

.footer-details { display: grid; gap: 4px; }
.footer-details p { display: flex; flex-wrap: wrap; gap: 12px; }
.footer-details span { position: relative; }
.footer-details span:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 10px;
  background: var(--color-divider);
}
.footer-bottom { 
  padding-top: var(--space-8); 
  border-top: 1px solid var(--color-divider); 
  color: var(--color-text-faint); 
}

/* Animations */
.reveal { opacity: 0; transform: translateY(40px); transition: all 1s cubic-bezier(0.16, 1, 0.3, 1); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }