/* ==========================================================================
   Samhan — Design System
   Signature motif: the louvre slat. Every blind, roller shade and shutter
   Samhan makes is built from overlapping bands that turn to control light.
   That single idea — a stack of bands, tilting to reveal what's behind —
   is reused as the site's structural device: section dividers, the hero
   reveal, and the process steps are all literally "slats" opening.
   ========================================================================== */

:root {
  --color-primary: #1F2937;
  --color-secondary: #9CA3AF;
  --color-accent: #C59D5F;
  --color-accent-light: #DDBD8A;
  --color-bg: #F9FAFB;
  --color-text: #111827;
  --color-muted: #D1D5DB;

  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'Fira Code', monospace;

  --slat-gap: 10px;
  --ease-slat: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

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

h1, h2, h3, h4, h5, .font-heading {
  font-family: var(--font-heading);
}

::selection { background: var(--color-accent); color: #fff; }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   Slat divider — a small stack of horizontal bands used under eyebrows,
   headings and as a section separator. Reads as a miniature closed blind.
   -------------------------------------------------------------------------- */
.slat-divider {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 56px;
}
.slat-divider span {
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-light) 60%, transparent 100%);
  border-radius: 2px;
}
.slat-divider span:nth-child(1) { width: 100%; }
.slat-divider span:nth-child(2) { width: 70%; }
.slat-divider span:nth-child(3) { width: 40%; }

.slat-divider.center { align-items: center; }
.slat-divider.center span:nth-child(1) { width: 56px; }
.slat-divider.center span:nth-child(2) { width: 38px; }
.slat-divider.center span:nth-child(3) { width: 20px; }

/* Full-width slat section separator between page sections */
.slat-seam {
  position: relative;
  height: 28px;
  overflow: hidden;
}
.slat-seam .slat {
  position: absolute;
  left: 0; right: 0;
  height: 4px;
  background: var(--color-muted);
  opacity: .5;
}
.slat-seam .slat::after {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: rgba(255,255,255,.6);
}

/* --------------------------------------------------------------------------
   Hero slat reveal — on load, horizontal bands sweep away like an opening
   blind to expose the hero content underneath.
   -------------------------------------------------------------------------- */
.slat-reveal-wrap {
  position: relative;
}
.slat-reveal {
  position: absolute;
  left: 0; width: 100%;
  background: var(--color-primary);
  z-index: 20;
  transform-origin: left center;
  animation: slat-open 900ms var(--ease-slat) forwards;
  animation-delay: calc(var(--i) * 70ms);
}
.slat-reveal::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: rgba(197,157,95,.5);
}
@keyframes slat-open {
  0%   { transform: scaleX(1); opacity: 1; }
  70%  { opacity: 1; }
  100% { transform: scaleX(0); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .slat-reveal { display: none; }
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: .95rem;
  letter-spacing: .02em;
  padding: .85rem 1.6rem;
  border-radius: 2px;
  transition: transform .25s var(--ease-slat), box-shadow .25s ease, background-color .25s ease, color .25s ease;
  white-space: nowrap;
}
.btn-accent {
  background: var(--color-accent);
  color: #fff;
}
.btn-accent:hover {
  background: #B08849;
  box-shadow: 0 8px 20px -6px rgba(197,157,95,.55);
  transform: translateY(-2px);
}
.btn-outline {
  border: 1.5px solid var(--color-muted);
  color: var(--color-primary);
  background: transparent;
}
.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}
.btn-ghost-light {
  border: 1.5px solid rgba(255,255,255,.35);
  color: #fff;
}
.btn-ghost-light:hover {
  background: rgba(255,255,255,.1);
  border-color: #fff;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.site-header {
  color: #fff;
  transition: background-color .35s ease, box-shadow .35s ease, color .35s ease;
}
.site-header .logo-mark { color: #fff; }
.site-header.is-scrolled {
  color: var(--color-primary);
  background-color: rgba(249,250,251,.92);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 rgba(17,24,39,.06);
}
.site-header.is-scrolled .logo-mark { color: var(--color-primary); }
.site-header .btn-outline { border-color: rgba(255,255,255,.4); color: #fff; }
.site-header.is-scrolled .btn-outline { border-color: var(--color-muted); color: var(--color-primary); }

.nav-link {
  position: relative;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: .9rem;
  letter-spacing: .02em;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0; bottom: -4px;
  width: 0; height: 2px;
  background: var(--color-accent);
  transition: width .3s var(--ease-slat);
}
.nav-link:hover::after, .nav-link.is-active::after { width: 100%; }

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card-service {
  background: #fff;
  border: 1px solid #EDEFF2;
  transition: transform .35s var(--ease-slat), box-shadow .35s ease, border-color .35s ease;
}
.card-service:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px -20px rgba(17,24,39,.25);
  border-color: var(--color-accent-light);
}

.eyebrow {
  font-family: var(--font-heading);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--color-accent);
}

/* Decorative gradient placeholders standing in for photography.
   Each variant nods at the product it represents through color + angle,
   overlaid with a faint slat pattern so empty imagery still fits the motif. */
.ph-media {
  position: relative;
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.ph-media::before {
  content: '';
  position: absolute; inset: 0;
  background-image: repeating-linear-gradient(
    180deg, rgba(255,255,255,.07) 0px, rgba(255,255,255,.07) 2px,
    transparent 2px, transparent 14px
  );
}
.ph-blinds   { background-image: linear-gradient(135deg, #1F2937 0%, #3d4a5c 55%, #C59D5F 140%); }
.ph-roller   { background-image: linear-gradient(135deg, #2b3543 0%, #6b7686 60%, #DDBD8A 140%); }
.ph-wardrobe { background-image: linear-gradient(135deg, #1F2937 0%, #4b5768 60%, #9CA3AF 140%); }
.ph-windows  { background-image: linear-gradient(135deg, #23303f 0%, #56677c 55%, #C59D5F 140%); }
.ph-shutters { background-image: linear-gradient(135deg, #171f29 0%, #384454 60%, #8b96a6 140%); }
.ph-hero     { background-image: linear-gradient(120deg, #171f29 0%, #1F2937 45%, #4a3b23 150%); }

/* Testimonial quote mark */
.quote-mark {
  font-family: var(--font-heading);
  font-size: 4.5rem;
  line-height: 1;
  color: var(--color-accent-light);
}

/* Icon sizing helper for /assets/images/visuals/icons/*.svg used as <img> */
.icon { display: inline-block; flex-shrink: 0; }

/* Form fields */
.field input, .field textarea, .field select {
  width: 100%;
  background: #fff;
  border: 1.5px solid var(--color-muted);
  padding: .8rem 1rem;
  font-family: var(--font-body);
  color: var(--color-text);
  border-radius: 2px;
  transition: border-color .25s ease;
}
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: var(--color-accent);
  outline: none;
}
.field label {
  font-family: var(--font-heading);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .03em;
  color: var(--color-primary);
  margin-bottom: .35rem;
  display: block;
}

/* Mobile nav panel */
.mobile-nav-enter { transition: transform .35s var(--ease-slat), opacity .3s ease; }

/* Gentle one-time scroll reveal, driven by main.js IntersectionObserver */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s var(--ease-slat), transform .7s var(--ease-slat);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}