/* ============================================================
   THE PREMIUM DESIGN — Global Stylesheet
   Converts code.html Tailwind design into pure CSS
   ============================================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif:ital,wght@0,400;0,700;1,400&family=Inter:wght@300;400;500;600&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200&display=swap');

/* ============================================================
   CSS Variables — Design Tokens
   ============================================================ */
:root {
  /* Colors */
  --color-background: #f9f9f9;
  --color-surface: #f9f9f9;
  --color-surface-bright: #f9f9f9;
  --color-surface-dim: #dadada;
  --color-surface-container-lowest: #ffffff;
  --color-surface-container-low: #f3f3f4;
  --color-surface-container: #eeeeee;
  --color-surface-container-high: #e8e8e8;
  --color-surface-container-highest: #e2e2e2;
  --color-surface-variant: #e2e2e2;

  --color-primary: #000000;
  --color-primary-container: #3c3b3b;
  --color-primary-fixed: #5f5e5e;
  --color-primary-fixed-dim: #474746;
  --color-on-primary: #e5e2e1;
  --color-on-primary-container: #ffffff;
  --color-on-primary-fixed: #ffffff;
  --color-on-primary-fixed-variant: #e5e2e1;
  --color-inverse-primary: #c8c6c5;

  --color-secondary: #5e5e5e;
  --color-secondary-container: #d5d4d4;
  --color-secondary-fixed: #c7c6c6;
  --color-secondary-fixed-dim: #acabab;
  --color-on-secondary: #ffffff;
  --color-on-secondary-container: #1b1c1c;
  --color-on-secondary-fixed: #1b1c1c;
  --color-on-secondary-fixed-variant: #3b3b3c;

  --color-tertiary: #3b3b3b;
  --color-tertiary-container: #747474;
  --color-tertiary-fixed: #5e5e5e;
  --color-tertiary-fixed-dim: #474747;
  --color-on-tertiary: #e2e2e2;
  --color-on-tertiary-container: #ffffff;
  --color-on-tertiary-fixed: #ffffff;
  --color-on-tertiary-fixed-variant: #e2e2e2;

  --color-on-background: #1a1c1c;
  --color-on-surface: #1a1c1c;
  --color-on-surface-variant: #474747;
  --color-outline: #5f5f5f;
  --color-outline-variant: #c6c6c6;
  --color-inverse-surface: #2f3131;
  --color-inverse-on-surface: #f0f1f1;

  --color-error: #ba1a1a;
  --color-error-container: #ffdad6;
  --color-on-error: #ffffff;
  --color-on-error-container: #410002;

  --color-surface-tint: #5f5e5e;
  --color-white: #ffffff;

  /* Typography */
  --font-headline: 'Noto Serif', serif;
  --font-body: 'Inter', sans-serif;
  --font-label: 'Inter', sans-serif;

  /* Spacing */
  --nav-height: 88px;

  /* Transitions */
  --transition-fast: 300ms ease;
  --transition-normal: 500ms ease;
  --transition-slow: 700ms ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--color-background);
  color: var(--color-on-background);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}

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

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

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

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

/* ============================================================
   Material Symbols
   ============================================================ */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 300, 'GRAD' 0, 'opsz' 24;
  font-size: 1.25rem;
  line-height: 1;
  vertical-align: middle;
  user-select: none;
}

/* ============================================================
   Utility Classes
   ============================================================ */
.no-scrollbar::-webkit-scrollbar {
  display: none;
}
.no-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.max-container {
  max-width: 1920px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   Fade-in Animation (IntersectionObserver)
   ============================================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms ease, transform 700ms ease;
}

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

.fade-in-delay-1 { transition-delay: 100ms; }
.fade-in-delay-2 { transition-delay: 200ms; }
.fade-in-delay-3 { transition-delay: 300ms; }
.fade-in-delay-4 { transition-delay: 400ms; }

/* ============================================================
   Navigation Bar
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.80);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 40px 60px -15px rgba(0, 0, 0, 0.04);
}

.nav__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 1.5rem 2rem;
  max-width: 1920px;
  margin-left: auto;
  margin-right: auto;
}

.nav__logo {
  font-family: var(--font-headline);
  font-size: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: #0c0c0c;
  transition: opacity var(--transition-fast);
}

.nav__logo:hover {
  opacity: 0.7;
}

.nav__links {
  display: none;
  align-items: center;
  gap: 3rem;
  list-style: none;
}

.nav__link {
  font-family: var(--font-label);
  font-size: 1.125rem;
  letter-spacing: -0.01em;
  color: var(--color-outline);
  transition: color var(--transition-fast);
}

.nav__link:hover {
  color: #0c0c0c;
}

.nav__cta {
  display: inline-block;
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  padding: 0.75rem 2rem;
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  transition: opacity var(--transition-normal);
}

.nav__cta:hover {
  opacity: 0.75;
}

.nav__cta:active {
  transform: scale(0.99);
}

/* Mobile menu toggle */
.nav__mobile-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.nav__mobile-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background-color: var(--color-primary);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav__mobile-toggle.active span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav__mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav__mobile-toggle.active span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile nav drawer */
.nav__mobile-menu {
  display: none;
  flex-direction: column;
  gap: 0;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-outline-variant);
}

.nav__mobile-menu.open {
  display: flex;
}

.nav__mobile-link {
  display: block;
  padding: 1rem 2rem;
  font-family: var(--font-label);
  font-size: 1rem;
  color: var(--color-on-background);
  border-bottom: 1px solid var(--color-outline-variant);
  transition: background-color var(--transition-fast);
}

.nav__mobile-link:hover {
  background-color: var(--color-surface-container-low);
}

/* ============================================================
   Hero Section
   ============================================================ */
.hero {
  height: 100vh;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background-color: var(--color-surface);
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.08;
  pointer-events: none;
}

.hero__bg svg {
  color: var(--color-primary);
  width: 600px;
  height: 600px;
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 1rem;
  opacity: 0;
  animation: fadeInHero 1.2s ease forwards 0.3s;
}

@keyframes fadeInHero {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero__title {
  font-family: var(--font-headline);
  font-size: clamp(2.5rem, 8vw, 8rem);
  color: var(--color-primary);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 1rem;
}

.hero__subtitle {
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.35em;
  color: var(--color-outline);
}

.hero__scroll {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  opacity: 0;
  animation: fadeInHero 1.2s ease forwards 1s;
}

.hero__scroll-text {
  font-family: var(--font-label);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  text-indent: 0.3em;
  color: var(--color-outline);
}

.hero__scroll-line {
  width: 1px;
  height: 3rem;
  background-color: rgba(119, 119, 119, 0.5);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.2); }
}

/* ============================================================
   Projects Section
   ============================================================ */
.projects {
  padding: 8rem 0;
  background-color: var(--color-white);
  overflow: hidden;
}

.projects__inner {
  max-width: 1920px;
  margin: 0 auto;
  padding: 0 2rem;
}

.projects__header {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 4rem;
  gap: 1rem;
}

.projects__title {
  font-family: var(--font-headline);
  font-size: clamp(2rem, 4vw, 3.75rem);
  color: var(--color-primary);
}

.projects__label {
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-outline);
}

/* Loading / empty state */
.projects-loading,
.projects-empty {
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-outline);
  padding: 3rem 0;
}

/* ============================================================
   Marquee / Portfolio Section
   ============================================================ */
@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@keyframes marquee-reverse {
  0% { transform: translateX(-50%); }
  100% { transform: translateX(0); }
}

.portfolio {
  padding: 8rem 0;
  background-color: var(--color-surface-container-low);
  overflow: hidden;
}

.portfolio__header {
  padding: 0 2rem;
  margin-bottom: 4rem;
  text-align: center;
}

.portfolio__title {
  font-family: var(--font-headline);
  font-size: clamp(2rem, 4vw, 3.75rem);
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.portfolio__subtitle {
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--color-outline);
}

.marquee-row {
  position: relative;
  width: 100%;
  overflow: hidden;
  margin-bottom: 3rem;
}

.marquee-row:last-child {
  margin-bottom: 0;
}

.marquee-track {
  display: flex;
  white-space: nowrap;
  gap: 3rem;
  will-change: transform;
}

.marquee-track--forward {
  animation: marquee 40s linear infinite;
}

.marquee-track--reverse {
  animation: marquee-reverse 35s linear infinite;
}

.marquee-track:hover {
  animation-play-state: paused;
}

.marquee-img {
  flex-shrink: 0;
  object-fit: cover;
  display: inline-block;
}

.marquee-row--top .marquee-img {
  height: 500px;
  width: auto;
}

.marquee-row--bottom .marquee-img {
  height: 400px;
  width: auto;
}

.portfolio-loading,
.portfolio-empty {
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-outline);
  text-align: center;
  padding: 3rem 0;
}

/* ============================================================
   Philosophy / Editorial Inset Section
   ============================================================ */
.philosophy {
  padding: 8rem 0;
  background-color: var(--color-white);
}

.philosophy__inner {
  max-width: 1920px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.philosophy__text {
  width: 100%;
  padding: 0 2rem;
  margin-bottom: 3rem;
}

.philosophy__label {
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-outline);
  margin-bottom: 1.5rem;
}

.philosophy__headline {
  font-family: var(--font-headline);
  font-size: clamp(2rem, 4vw, 4.5rem);
  line-height: 1.1;
  margin-bottom: 2rem;
  color: var(--color-on-background);
}

.philosophy__body {
  font-family: var(--font-body);
  color: var(--color-tertiary-fixed);
  line-height: 1.8;
  max-width: 28rem;
}

.philosophy__cta {
  display: inline-block;
  margin-top: 3rem;
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-primary);
  border-bottom: 1px solid rgba(0, 0, 0, 0.3);
  padding-bottom: 0.5rem;
  transition: border-color var(--transition-fast);
  background: none;
  cursor: pointer;
}

.philosophy__cta:hover {
  border-bottom-color: var(--color-primary);
}

.philosophy__image-wrapper {
  width: 100%;
  height: 400px;
  overflow: hidden;
  position: relative;
  background-color: var(--color-surface-container-high);
}

.philosophy__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
  background-color: var(--color-white);
  border-top: 1px solid #f0f0f0;
}

.footer__main {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: 5rem 2rem;
  max-width: 1920px;
  margin: 0 auto;
}

.footer__brand-name {
  font-family: var(--font-headline);
  font-size: 1.25rem;
  color: #0c0c0c;
  margin-bottom: 1rem;
  display: block;
}

.footer__brand-desc {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  line-height: 1.8;
  color: #777777;
  max-width: 24rem;
  margin-bottom: 2rem;
}

.footer__social {
  display: flex;
  gap: 1.5rem;
}

.footer__social-link {
  color: #8c8c8c;
  transition: color var(--transition-fast);
}

.footer__social-link:hover {
  color: #0c0c0c;
}

.footer__columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.footer__col-title {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #0c0c0c;
  margin-bottom: 1.5rem;
  display: block;
}

.footer__col-item {
  display: block;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #777777;
  margin-bottom: 1rem;
  transition: color var(--transition-fast);
}

a.footer__col-item:hover {
  color: #0c0c0c;
}

.footer__bottom {
  padding: 0 2rem 3rem;
  max-width: 1920px;
  margin: 0 auto;
  text-align: center;
}

.footer__copy {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #999999;
}

/* ============================================================
   Lightbox
   ============================================================ */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background-color: rgba(0, 0, 0, 0.95);
  align-items: center;
  justify-content: center;
  animation: lightboxFadeIn 0.3s ease;
}

.lightbox.open {
  display: flex;
}

@keyframes lightboxFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.lightbox__image {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
}

.lightbox__close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  color: #ffffff;
  font-size: 2rem !important;
  cursor: pointer;
  opacity: 0.8;
  transition: opacity var(--transition-fast);
  background: none;
  border: none;
}

.lightbox__close:hover {
  opacity: 1;
}

.lightbox__prev,
.lightbox__next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: #ffffff;
  font-size: 2rem !important;
  cursor: pointer;
  opacity: 0.6;
  transition: opacity var(--transition-fast);
  background: none;
  border: none;
  padding: 1rem;
}

.lightbox__prev { left: 1.5rem; }
.lightbox__next { right: 1.5rem; }

.lightbox__prev:hover,
.lightbox__next:hover {
  opacity: 1;
}

/* ============================================================
   Process (시공 과정) Section
   ============================================================ */
.process {
  padding: 8rem 0;
  background-color: var(--color-surface-container-low);
}

.process__inner {
  max-width: 1920px;
  margin: 0 auto;
  padding: 0 2rem;
}

.process__header {
  text-align: center;
  margin-bottom: 4rem;
}

.process__title {
  font-family: var(--font-headline);
  font-size: clamp(2rem, 4vw, 3.75rem);
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.process__subtitle {
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--color-outline);
}

.process__carousel {
  position: relative;
  overflow: hidden;
}

.process__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  transition: transform 0.4s ease;
}

.process__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-white);
  border: 1px solid var(--color-outline-variant);
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.process__nav:hover {
  background: var(--color-surface-container-low);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.process__nav--prev { left: -0.5rem; }
.process__nav--next { right: -0.5rem; }

.process__dots {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 2rem;
}

.process__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-outline-variant);
  border: none;
  padding: 0;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.process__dot--active {
  background: var(--color-primary);
  transform: scale(1.3);
}

.process-card {
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.process-card__image-wrapper {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: var(--color-surface-container-highest);
}

.process-card__image-wrapper--empty {
  display: flex;
  align-items: center;
  justify-content: center;
}

.process-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.process-card__body {
  padding: 1.25rem;
}

.process-card__title {
  font-family: var(--font-headline);
  font-size: 1.125rem;
  color: var(--color-on-background);
  margin-bottom: 0.5rem;
}

.process-card__summary {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-on-surface-variant);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Empty state */
.process-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 4rem 2rem;
}

.process-empty__text {
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-outline);
  margin-bottom: 1.5rem;
}

.process-empty__cta {
  display: inline-block;
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-primary);
  border-bottom: 1px solid rgba(0, 0, 0, 0.3);
  padding-bottom: 0.5rem;
  transition: border-color var(--transition-fast);
}

.process-empty__cta:hover {
  border-bottom-color: var(--color-primary);
}

/* Loading state */
.process-loading {
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-outline);
  text-align: center;
  padding: 3rem 0;
}

/* ============================================================
   Consultation Section
   ============================================================ */
.consultation {
  padding: 8rem 2rem;
  background-color: #3B4A3A;
  color: #e5e2e1;
}

.consultation__inner {
  max-width: 720px;
  margin: 0 auto;
}

.consultation__header {
  text-align: center;
  margin-bottom: 3rem;
}

.consultation__title {
  font-family: var(--font-headline);
  font-size: clamp(2rem, 4vw, 3.75rem);
  color: var(--color-on-primary);
  margin-bottom: 1rem;
}

.consultation__subtitle {
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: rgba(255, 255, 255, 0.8);
}

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

.consultation__fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.consultation__field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.consultation__field--full {
  grid-column: 1 / -1;
}

.consultation__label {
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.85);
}

.consultation__input,
.consultation__textarea {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--color-on-primary);
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.45);
  padding: 0.75rem 0;
  outline: none;
  transition: border-color var(--transition-fast);
}

.consultation__input::placeholder,
.consultation__textarea::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.consultation__input:focus,
.consultation__textarea:focus {
  border-bottom-color: var(--color-on-primary);
}

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

.consultation__submit-row {
  display: flex;
  justify-content: center;
  margin-top: 1rem;
}

.consultation__submit {
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: #3B4A3A;
  background: #e5e2e1;
  border: none;
  padding: 1rem 3rem;
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.consultation__submit:hover {
  opacity: 0.9;
}

.consultation__submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.consultation__success {
  font-family: var(--font-label);
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.9);
  text-align: center;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.consultation__success.visible {
  opacity: 1;
}

/* ============================================================
   Toast Notification
   ============================================================ */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  font-family: var(--font-label);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  padding: 1rem 2rem;
  z-index: 500;
  transition: transform var(--transition-fast);
  pointer-events: none;
  white-space: nowrap;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

/* ============================================================
   Responsive — Tablet (768px+)
   ============================================================ */
@media (min-width: 768px) {
  .nav__links {
    display: flex;
  }

  .nav__mobile-toggle {
    display: none;
  }

  .nav__mobile-menu {
    display: none !important;
  }

  .projects__header {
    flex-direction: row;
    align-items: baseline;
  }

  .process__nav--prev { left: 0.5rem; }
  .process__nav--next { right: 0.5rem; }

  .process__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }

  .process-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  }

  .philosophy__inner {
    flex-direction: row;
    align-items: center;
  }

  .philosophy__text {
    width: 50%;
    padding: 0 3rem 0 3rem;
    margin-bottom: 0;
  }

  .philosophy__image-wrapper {
    width: 50%;
    height: 600px;
  }

  .footer__main {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }

  .footer__columns {
    gap: 4rem;
  }

  .footer__bottom {
    text-align: left;
  }
}

/* ============================================================
   Responsive — Desktop (1024px+)
   ============================================================ */
@media (min-width: 1024px) {
  .philosophy__text {
    padding: 0 6rem;
  }

  .process__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .process__nav--prev { left: 1rem; }
  .process__nav--next { right: 1rem; }
}

/* ============================================================
   Responsive — Mobile only (<768px)
   ============================================================ */
@media (max-width: 767px) {
  .nav__inner {
    padding: 1rem 1.25rem;
  }

  .nav__cta {
    display: none;
  }

  .hero__title {
    font-size: clamp(2rem, 10vw, 4rem);
  }

  .projects {
    padding: 4rem 0;
  }

  .projects__inner {
    padding: 0 1.25rem;
  }

  .portfolio {
    padding: 4rem 0;
  }

  .portfolio__header {
    padding: 0 1.25rem;
  }

  .marquee-row--top .marquee-img {
    height: 300px;
  }

  .marquee-row--bottom .marquee-img {
    height: 240px;
  }

  .process {
    padding: 4rem 0;
  }

  .process__inner {
    padding: 0 1.25rem;
  }

  .consultation {
    padding: 4rem 1.25rem;
  }

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

  .footer__main {
    padding: 3rem 1.25rem;
  }

  .footer__bottom {
    padding: 0 1.25rem 2rem;
  }
}

/* ============================================================
   Floating Action Button (FAB)
   ============================================================ */
.fab {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 9999;
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  gap: 0.75rem;
}

.fab__toggle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: none;
  background: var(--color-primary);
  color: var(--color-on-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  z-index: 2;
}

.fab__toggle:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.3);
  transform: scale(1.05);
}

.fab__icon {
  font-size: 24px;
  transition: opacity 0.25s ease, transform 0.25s ease;
  position: absolute;
}

.fab__icon--close {
  opacity: 0;
  transform: rotate(-90deg);
}

.fab.open .fab__icon--open {
  opacity: 0;
  transform: rotate(90deg);
}

.fab.open .fab__icon--close {
  opacity: 1;
  transform: rotate(0deg);
}

/* Menu */
.fab__menu {
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  gap: 0.75rem;
  pointer-events: none;
}

.fab__item {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
  opacity: 0;
  transform: scale(0.5) translateY(20px);
  transition: opacity 0.25s ease, transform 0.25s ease, background-color 0.2s ease;
  position: relative;
}

.fab__item:nth-child(1) { transition-delay: 0s; }
.fab__item:nth-child(2) { transition-delay: 0.05s; }
.fab__item:nth-child(3) { transition-delay: 0.1s; }

.fab.open .fab__menu {
  pointer-events: auto;
}

.fab.open .fab__item {
  opacity: 1;
  transform: scale(1) translateY(0);
}

.fab.open .fab__item:nth-child(1) { transition-delay: 0.1s; }
.fab.open .fab__item:nth-child(2) { transition-delay: 0.05s; }
.fab.open .fab__item:nth-child(3) { transition-delay: 0s; }

/* Tooltip */
.fab__item::before {
  content: attr(data-tooltip);
  position: absolute;
  right: calc(100% + 0.75rem);
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  padding: 0.35rem 0.65rem;
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.fab__item:hover::before {
  opacity: 1;
}

/* Item Colors */
.fab__item--kakao {
  background: #FEE500;
  color: #3C1E1E;
}

.fab__item--kakao:hover {
  background: #F5DC00;
}

.fab__item--threads {
  background: #000000;
  color: #ffffff;
}

.fab__item--threads:hover {
  background: #333333;
}

.fab__item--phone {
  background: #3B4A3A;
  color: #ffffff;
}

.fab__item--phone:hover {
  background: #4a5c49;
}

/* Item Icons */
.fab__item-icon {
  font-size: 22px;
  line-height: 1;
}

.fab__item-icon svg,
svg.fab__item-icon {
  width: 22px;
  height: 22px;
}

/* Mobile adjustments */
@media (max-width: 767px) {
  .fab {
    bottom: 1.25rem;
    right: 1.25rem;
  }

  .fab__toggle {
    width: 52px;
    height: 52px;
  }

  .fab__item {
    width: 44px;
    height: 44px;
  }

  .fab__item::before {
    display: none;
  }
}