/* ============================================================
   THE HEE - Corporate Clean Style
   Design Reference: nscompany.kr
   Mobile-First | Vanilla CSS | No frameworks
   ============================================================ */

/* --- CSS Custom Properties --- */
:root {
  --color-bg: #FFFFFF;
  --color-bg-alt: #F8FAFC;
  --color-bg-dark: #121212;
  --color-text: #000000;
  --color-text-secondary: #4A5568;
  --color-text-muted: #718096;
  --color-primary: #007BFF;
  --color-primary-hover: #0056D2;
  --color-accent: #121212;
  --color-border: #E2E8F0;
  --color-border-light: #F1F5F9;
  --color-white: #FFFFFF;
  --color-overlay: rgba(0, 0, 0, 0.6);

  --font-heading: 'Montserrat', 'Pretendard Variable', 'Pretendard', sans-serif;
  --font-body: 'Pretendard Variable', 'Pretendard', -apple-system, 'Noto Sans KR', 'Malgun Gothic', sans-serif;

  --radius-none: 0px;
  --radius-card: 10px;
  --radius-sm: 4px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06);

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.15s ease;

  --container-max: 1280px;
  --container-narrow: 960px;
  --header-height: 72px;

  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;
  --space-2xl: 96px;
  --space-3xl: 128px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
  word-break: keep-all;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}

h1 { font-size: 32px; }
h2 { font-size: 28px; }
h3 { font-size: 22px; }
h4 { font-size: 18px; }

/* --- Utility --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding: 60px 0;
}

.section--alt {
  background: var(--color-bg-alt);
}

.section--dark {
  background: var(--color-accent);
  color: var(--color-white);
}

.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--color-white);
}

.section__badge {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-primary);
  background: rgba(0, 123, 255, 0.08);
  padding: 6px 16px;
  border-radius: var(--radius-none);
  margin-bottom: 16px;
}

.section__title {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.section__desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 600px;
}

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

.text-center .section__desc {
  margin-left: auto;
  margin-right: auto;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.5px;
  padding: 14px 32px;
  border-radius: var(--radius-none);
  transition: all var(--transition);
  min-height: 48px;
  min-width: 44px;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
}

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

.btn--primary:hover {
  background: #333333;
  border-color: #333333;
}

.btn--outline {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

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

.btn--white {
  background: var(--color-white);
  color: var(--color-accent);
  border-color: var(--color-white);
}

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

.btn--sm {
  padding: 10px 20px;
  font-size: 13px;
  min-height: 40px;
}

.btn__arrow {
  transition: transform var(--transition-fast);
}

.btn:hover .btn__arrow {
  transform: translateX(4px);
}

/* --- Header & Navigation --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition);
}

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

.header--transparent {
  background: transparent;
  border-bottom-color: transparent;
}

.header--transparent .nav__link {
  color: var(--color-white);
}

.header--transparent .nav__logo-text {
  color: var(--color-white);
}

.header--transparent .hamburger span {
  background: var(--color-white);
}

.header--transparent.header--scrolled {
  background: rgba(255, 255, 255, 0.95);
  border-bottom-color: var(--color-border);
}

.header--transparent.header--scrolled .nav__link {
  color: var(--color-text);
}

.header--transparent.header--scrolled .nav__logo-text {
  color: var(--color-text);
}

.header--transparent.header--scrolled .hamburger span {
  background: var(--color-accent);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  z-index: 1001;
}

.nav__logo-text {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--color-accent);
  transition: color var(--transition);
}

.nav__menu {
  display: none;
}

.nav__link {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  letter-spacing: 0.3px;
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-text);
}

.nav__cta {
  display: none;
}

/* Hamburger */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  cursor: pointer;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-accent);
  transition: all var(--transition);
  border-radius: 1px;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu Overlay */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  padding: var(--header-height) 0 40px;
}

.mobile-menu.active {
  transform: translateX(0);
}

.mobile-menu__link {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  padding: 20px 40px;
  text-decoration: none;
  transition: color var(--transition-fast);
  letter-spacing: -0.5px;
}

.mobile-menu__link:hover {
  color: var(--color-primary);
}

.mobile-menu__cta {
  margin-top: 32px;
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--color-accent);
}

.hero__bg-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.5;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.4) 0%,
    rgba(0, 0, 0, 0.6) 100%
  );
  z-index: 1;
}

.hero__content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
  padding-top: var(--header-height);
}

.hero__badge {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-white);
  background: var(--color-primary);
  padding: 8px 20px;
  border-radius: var(--radius-none);
  margin-bottom: 24px;
}

.hero__title {
  font-size: 36px;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.15;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.hero__subtitle {
  font-size: 16px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 520px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-family: var(--font-heading);
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.6), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* --- Stats Section --- */
.stats {
  background: var(--color-accent);
  padding: 48px 0;
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  text-align: center;
}

.stats__item {
  padding: 16px;
}

.stats__number {
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1;
  margin-bottom: 8px;
}

.stats__number span {
  color: var(--color-primary);
}

.stats__label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.5px;
}

/* --- About Preview --- */
.about-preview {
  padding: 60px 0;
}

.about-preview__grid {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.about-preview__content {
  order: 2;
}

.about-preview__image {
  order: 1;
  border-radius: var(--radius-card);
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.about-preview__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-preview__text {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  line-height: 1.8;
}

/* --- Service Cards --- */
.services {
  padding: 60px 0;
}

.services__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 40px;
}

.service-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  transition: all var(--transition);
  text-decoration: none;
  display: block;
}

.service-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.service-card__icon {
  width: 48px;
  height: 48px;
  background: rgba(0, 123, 255, 0.08);
  border-radius: var(--radius-card);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 22px;
}

.service-card__title {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
}

.service-card__desc {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* --- History Timeline (Accordion) --- */
.timeline {
  padding: 60px 0;
}

.accordion-container {
  max-width: 900px;
  margin: 40px auto 0;
  text-align: left;
}

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

.accordion-item:first-child {
  border-top: 1px solid var(--color-border);
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 16px;
  cursor: pointer;
  transition: background var(--transition);
  user-select: none;
}

.accordion-header:hover {
  background: var(--color-bg-alt);
}

.accordion-item.active .accordion-header {
  background: var(--color-bg-alt);
}

.accordion-header-left {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  flex: 1;
  min-width: 0;
}

.accordion-year {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 700;
  color: var(--color-accent);
  transition: color var(--transition);
  min-width: auto;
}

.accordion-item.active .accordion-year {
  color: var(--color-primary);
}

.accordion-summary {
  font-size: 11px;
  color: var(--color-text-muted);
  font-weight: 400;
  word-break: keep-all;
  line-height: 1.4;
}

.accordion-item.active .accordion-summary {
  color: var(--color-text-secondary);
}

.accordion-header-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.accordion-count {
  font-family: var(--font-heading);
  font-size: 11px;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.accordion-item.active .accordion-count {
  color: var(--color-primary);
}

.accordion-icon {
  width: 24px;
  height: 24px;
  position: relative;
  flex-shrink: 0;
}

.accordion-icon::before,
.accordion-icon::after {
  content: '';
  position: absolute;
  background: var(--color-text-muted);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
  border-radius: 1px;
}

.accordion-icon::before {
  width: 12px;
  height: 2px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.accordion-icon::after {
  width: 2px;
  height: 12px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.accordion-item.active .accordion-icon::before {
  background: var(--color-primary);
}

.accordion-item.active .accordion-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.accordion-item.active .accordion-body {
  max-height: 2000px;
}

.accordion-body-inner {
  padding: 0 16px 28px;
}

.accordion-body-inner::before {
  content: '';
  display: block;
  width: 40px;
  height: 1px;
  background: rgba(0, 123, 255, 0.4);
  margin-bottom: 24px;
}

.accordion-category {
  margin-bottom: 22px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.accordion-item.active .accordion-category {
  opacity: 1;
  transform: translateY(0);
}

.accordion-item.active .accordion-category:nth-child(1) { transition-delay: 0.08s; }
.accordion-item.active .accordion-category:nth-child(2) { transition-delay: 0.16s; }
.accordion-item.active .accordion-category:nth-child(3) { transition-delay: 0.24s; }
.accordion-item.active .accordion-category:nth-child(4) { transition-delay: 0.32s; }

.category-label {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 14px;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(0, 123, 255, 0.3);
}

.category-items {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.category-item {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.65;
  padding-left: 14px;
  position: relative;
}

.category-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-border);
}

/* --- Gallery Preview --- */
.gallery {
  padding: 60px 0;
}

.gallery__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 32px;
}

.gallery__item {
  border-radius: var(--radius-card);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  position: relative;
}

.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gallery__item:hover img {
  transform: scale(1.05);
}

.gallery__more {
  margin-top: 32px;
  text-align: center;
}

/* --- Contact Form --- */
.contact {
  padding: 60px 0;
}

.contact__grid {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact__info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact__info-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: rgba(0, 123, 255, 0.08);
  border-radius: var(--radius-card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.contact__info-label {
  font-size: 12px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
  font-weight: 600;
}

.contact__info-value {
  font-size: 15px;
  color: var(--color-text);
  font-weight: 500;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
  letter-spacing: 0.3px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.form-submit {
  margin-top: 8px;
}

.form-submit .btn {
  width: 100%;
}

.form-status {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  display: none;
}

.form-status--success {
  display: block;
  background: #E6F9ED;
  color: #0E7A3A;
  border: 1px solid #B7EDCA;
}

.form-status--error {
  display: block;
  background: #FEE8E8;
  color: #C53030;
  border: 1px solid #FEB2B2;
}

/* --- Certificates --- */
.certificates {
  padding: 60px 0;
}

.certificates__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 32px;
}

.certificates__item {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  transition: box-shadow var(--transition), transform var(--transition);
  cursor: pointer;
  will-change: transform;
  position: relative;
  z-index: 0;
}

.certificates__item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  z-index: 1;
}

.certificates__item img {
  width: 100%;
  height: auto;
  display: block;
}

/* cert00: 2열 span, 자연 비율 (크롭 없음) */
.certificates__item--wide {
  grid-column: span 2;
}

.certificates__caption {
  padding: 10px 12px;
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.4;
}

/* --- Footer --- */
.footer {
  background: var(--color-accent);
  color: rgba(255, 255, 255, 0.7);
  padding: 48px 0 24px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.footer__brand {
  margin-bottom: 16px;
}

.footer__logo {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 12px;
}

.footer__desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.5);
}

.footer__nav-title {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.footer__nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__nav-link {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition-fast);
}

.footer__nav-link:hover {
  color: var(--color-white);
}

.footer__company-info {
  font-size: 13px;
  line-height: 2;
  color: rgba(255, 255, 255, 0.4);
}

.footer__divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
  margin-bottom: 24px;
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  text-align: center;
}

.footer__copyright {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

.footer__back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition-fast);
  cursor: pointer;
}

.footer__back-to-top:hover {
  color: var(--color-white);
}

/* --- Page Hero (subpages) --- */
.page-hero {
  padding: calc(var(--header-height) + 60px) 0 60px;
  background: var(--color-bg-alt);
  text-align: center;
}

.page-hero--dark {
  background: var(--color-accent);
  color: var(--color-white);
}

.page-hero--dark .page-hero__title {
  color: var(--color-white);
}

.page-hero--dark .page-hero__desc {
  color: rgba(255, 255, 255, 0.7);
}

.page-hero__title {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
}

.page-hero__desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  max-width: 540px;
  margin: 0 auto;
}

/* --- About Page --- */

/* About Hero */
.about-hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  padding: calc(var(--header-height) + 40px) 20px 60px;
  text-align: center;
}

.about-hero__inner {
  max-width: var(--container-narrow);
  width: 100%;
}

.about-hero__title {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.3;
  margin: 16px 0 20px;
}

.about-hero__subtitle {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.7;
}

/* About Story */
.about-story__text {
  font-size: 18px;
  line-height: 1.9;
  color: var(--color-text-secondary);
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  word-break: keep-all;
}

.about-story__highlight {
  color: var(--color-primary);
  font-weight: 600;
}

/* About CEO */
.about-ceo__grid {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.about-ceo__image-wrap {
  border-radius: var(--radius-card);
  overflow: hidden;
}

.about-ceo__image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.about-ceo__heading {
  font-size: 24px;
  font-weight: 800;
  line-height: 1.4;
  margin: 16px 0 20px;
  color: var(--color-text);
}

.about-ceo__quote {
  font-size: 15px;
  font-style: italic;
  color: var(--color-text-secondary);
  line-height: 1.8;
  border-left: 3px solid var(--color-primary);
  padding-left: 20px;
  margin: 0 0 24px;
}

.about-ceo__body {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-ceo__name {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-top: 24px;
}

.about-ceo__name span {
  display: block;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* About Values Grid */
.about-values__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 40px;
}

.about-value-card {
  text-align: center;
  padding: 32px 16px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  transition: all var(--transition);
}

.about-value-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.about-value-card__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  color: var(--color-primary);
}

.about-value-card__icon svg {
  width: 100%;
  height: 100%;
}

.about-value-card__title {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}

.about-value-card__desc {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* About Timeline */
.about-timeline {
  position: relative;
  padding: 40px 0 20px;
  margin-top: 40px;
}

.about-timeline__line {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.about-timeline__year-block {
  position: relative;
  padding-left: 3rem;
  margin-bottom: 3rem;
}

.about-timeline__year-block:last-child {
  margin-bottom: 0;
}

.about-timeline__dot {
  position: absolute;
  left: -6px;
  top: 0.375rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-primary);
  z-index: 1;
}

.about-timeline__year-label {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 1.5rem;
  line-height: 1;
}

.about-timeline__categories {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.about-timeline__category {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.625rem;
}

.about-timeline__cat-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.5px;
  word-break: keep-all;
}

.about-timeline__events {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.about-timeline__event {
  position: relative;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  padding-left: 16px;
  word-break: keep-all;
}

.about-timeline__event::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-text-muted);
  position: absolute;
  left: 0;
  top: 0.6em;
}

/* --- Service Page --- */
.service-detail {
  padding: 60px 0;
}

.service-detail__list {
  display: flex;
  flex-direction: column;
  gap: 48px;
  margin-top: 40px;
}

.service-detail__item {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-border);
}

.service-detail__item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.service-detail__number {
  font-family: var(--font-heading);
  font-size: 48px;
  font-weight: 800;
  color: rgba(0, 123, 255, 0.15);
  line-height: 1;
}

.service-detail__title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-detail__desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.service-detail__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.service-detail__tag {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-bg-alt);
  padding: 8px 16px;
  border-radius: var(--radius-none);
  border: 1px solid var(--color-border);
}

/* STEAM Section */
.steam {
  padding: 60px 0;
}

.steam__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 40px;
}

.steam__card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  transition: all var(--transition);
}

.steam__card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.steam__letter {
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 8px;
}

.steam__word {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.steam__desc {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Performance Teams */
.teams {
  padding: 60px 0;
}

.teams__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 40px;
}

.team-card {
  text-align: center;
  padding: 32px 16px;
  background: var(--color-accent);
  border-radius: var(--radius-card);
  transition: all var(--transition);
}

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

.team-card__icon {
  font-size: 36px;
  margin-bottom: 12px;
}

.team-card__title {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 6px;
}

.team-card__desc {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.5;
}

/* --- Portfolio Page --- */
.portfolio {
  padding: 60px 0;
}

.portfolio__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
  justify-content: center;
}

.portfolio__filter-btn {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 600;
  padding: 10px 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-none);
  background: var(--color-bg);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 44px;
}

.portfolio__filter-btn:hover,
.portfolio__filter-btn.active {
  background: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}

.portfolio__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.portfolio__item {
  border-radius: var(--radius-card);
  overflow: hidden;
  position: relative;
  aspect-ratio: 4 / 3;
  cursor: pointer;
}

.portfolio__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.portfolio__item:hover img {
  transform: scale(1.05);
}

.portfolio__item-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 16px;
}

.portfolio__item:hover .portfolio__item-overlay {
  opacity: 1;
}

.portfolio__item-title {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-white);
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.92);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.lightbox.active {
  display: flex;
}

.lightbox__close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 50%;
  color: var(--color-white);
  font-size: 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.lightbox__close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.lightbox__img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 50%;
  color: var(--color-white);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.lightbox__nav:hover {
  background: rgba(255, 255, 255, 0.25);
}

.lightbox__prev { left: 16px; }
.lightbox__next { right: 16px; }

/* --- Offline Page --- */
.offline {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
}

.offline__icon {
  font-size: 64px;
  margin-bottom: 24px;
}

.offline__title {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 12px;
}

.offline__text {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Scroll Animations --- */

/* No-JS fallback: show everything */
.reveal {
  opacity: 1;
  transform: translateY(0);
}

/* When JS is available, hide for animation */
.js-ready .reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.js-ready .reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.js-ready .reveal--delay-1 { transition-delay: 0.1s; }
.js-ready .reveal--delay-2 { transition-delay: 0.2s; }
.js-ready .reveal--delay-3 { transition-delay: 0.3s; }
.js-ready .reveal--delay-4 { transition-delay: 0.4s; }
.js-ready .reveal--delay-5 { transition-delay: 0.5s; }

/* --- Media Queries --- */

/* Tablet (768px+) */
@media (min-width: 768px) {
  h1 { font-size: 44px; }
  h2 { font-size: 36px; }
  h3 { font-size: 26px; }

  .container { padding: 0 40px; }
  .section { padding: 80px 0; }

  .section__title { font-size: 36px; }
  .section__desc { font-size: 16px; }

  /* Nav */
  .hamburger { display: none; }
  .mobile-menu { display: none !important; }

  .nav__menu {
    display: flex;
    align-items: center;
    gap: 32px;
  }

  .nav__cta {
    display: block;
  }

  /* Hero */
  .hero__title { font-size: 48px; }
  .hero__subtitle { font-size: 17px; }
  .hero__content { padding: 0 40px; padding-top: var(--header-height); }

  /* Stats */
  .stats__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
  }

  .stats__number { font-size: 44px; }

  /* About Preview */
  .about-preview__grid {
    flex-direction: row;
    align-items: center;
  }

  .about-preview__content {
    order: 1;
    flex: 1;
  }

  .about-preview__image {
    order: 2;
    flex: 1;
  }

  /* Services */
  .services__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  /* Timeline accordion tablet+ */
  .accordion-header {
    padding: 24px 28px;
  }

  .accordion-header-left {
    flex-direction: row;
    align-items: center;
    gap: 24px;
  }

  .accordion-year {
    font-size: 36px;
    min-width: 100px;
  }

  .accordion-summary {
    font-size: 14px;
  }

  .accordion-header-right {
    gap: 16px;
  }

  .accordion-count {
    font-size: 13px;
  }

  .accordion-icon {
    width: 32px;
    height: 32px;
  }

  .accordion-icon::before { width: 16px; }
  .accordion-icon::after { height: 16px; }

  .accordion-body-inner {
    padding: 0 28px 36px;
  }

  .category-items {
    grid-template-columns: 1fr 1fr;
    gap: 6px 32px;
  }

  .category-item {
    font-size: 14px;
    line-height: 1.7;
  }

  .category-label {
    font-size: 11px;
  }

  .accordion-category {
    margin-bottom: 28px;
  }

  /* Gallery */
  .gallery__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  /* Contact */
  .contact__grid {
    flex-direction: row;
  }

  .contact__info { flex: 1; }
  .contact-form { flex: 1.2; }

  .form-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .form-submit .btn { width: auto; }

  /* Certificates */
  .certificates__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  .certificates__item--wide {
    grid-column: span 2;
  }
  /* Footer */
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
  }

  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
  }

  /* Page Hero */
  .page-hero {
    padding: calc(var(--header-height) + 80px) 0 80px;
  }

  .page-hero__title { font-size: 40px; }

  /* About Hero */
  .about-hero__title { font-size: 40px; }
  .about-hero__subtitle { font-size: 16px; }

  /* About Story */
  .about-story__text { font-size: 20px; }

  /* About CEO */
  .about-ceo__grid {
    flex-direction: row;
    align-items: center;
    gap: 48px;
  }
  .about-ceo__image-wrap { flex: 1; max-width: 400px; }
  .about-ceo__content { flex: 1; }
  .about-ceo__heading { font-size: 28px; }

  /* About Values */
  .about-values__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

  /* About Timeline - desktop */
  .about-timeline__category {
    grid-template-columns: 200px 1fr;
    gap: 2rem;
  }

  /* Service Detail */
  .service-detail__item {
    flex-direction: row;
    align-items: flex-start;
    gap: 40px;
  }

  .service-detail__number {
    font-size: 64px;
    min-width: 100px;
  }

  /* STEAM */
  .steam__grid {
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
  }

  .steam__card { text-align: center; }

  /* Teams */
  .teams__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

  /* Portfolio */
  .portfolio__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
  h1 { font-size: 52px; }
  h2 { font-size: 42px; }

  .section { padding: 100px 0; }
  .section__title { font-size: 42px; }

  /* Hero */
  .hero__title { font-size: 56px; }
  .hero__subtitle { font-size: 18px; }

  /* Services */
  .services__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .service-card { padding: 36px 28px; }

  /* Gallery */
  .gallery__grid { gap: 20px; }

  /* About */
  .about-hero { min-height: 80vh; }
  .about-hero__title { font-size: 48px; }
  .about-ceo__heading { font-size: 32px; }

  .about-values__grid { gap: 24px; }

  /* Service Detail */
  .service-detail__number { font-size: 80px; min-width: 120px; }
  .service-detail__title { font-size: 26px; }

  /* Certificates - Grid */
  .certificates__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
}

/* Large Desktop (1280px+) */
@media (min-width: 1280px) {
  .container { padding: 0 48px; }

  .hero__title { font-size: 64px; }

  .stats__number { font-size: 52px; }

  /* Portfolio */
  .portfolio__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }


  .about-hero__title { font-size: 56px; }
  .about-story__text { font-size: 22px; }

  .section__title { font-size: 48px; }
}

/* --- Video Modal --- */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  align-items: center;
  justify-content: center;
}
.video-modal.is-active {
  display: flex;
}
.video-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
}
.video-modal__container {
  position: relative;
  width: 90%;
  max-width: 900px;
  z-index: 1;
}
.video-modal__close {
  position: absolute;
  top: -44px;
  right: 0;
  background: none;
  border: none;
  color: #fff;
  font-size: 32px;
  cursor: pointer;
  line-height: 1;
  padding: 4px 8px;
  transition: opacity 0.2s;
}
.video-modal__close:hover {
  opacity: 0.7;
}
.video-modal__player {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 */
  background: #000;
  border-radius: var(--radius-card);
  overflow: hidden;
}
.video-modal__player iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* --- Print --- */
@media print {
  .header, .footer, .hero__bg-wrap, .hero__overlay,
  .btn, .hamburger, .mobile-menu, .lightbox { display: none !important; }
  body { color: #000; background: #fff; }
  .section { padding: 20px 0; }
}