/* ==========================================================================
   CAMPETTI ARCHITECTS — TECTONIC MONOLITH DESIGN SYSTEM
   Standardized Stylesheet for Static Production Template
   ========================================================================== */

/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Space+Grotesk:wght@300;400;500;600;700&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');

/* --- Root CSS Variables (Tectonic Monolith Tokens) --- */
:root {
  /* Surfaces & Backgrounds */
  --color-monolith: #111111;
  --color-carbon: #161617;
  --color-surface-dim: #ddd9d8;
  --color-surface-bright: #fdf8f8;
  --color-surface-lowest: #ffffff;
  --color-surface-low: #f7f3f2;
  --color-surface: #fdf8f8;
  --color-surface-container: #f1edec;
  --color-surface-container-high: #ebe7e6;
  --color-surface-container-highest: #e5e2e1;
  --color-stone: #f7f6f2;

  /* Inks & Text Colors */
  --color-on-surface: #1c1b1b;
  --color-on-surface-variant: #444748;
  --color-inverse-surface: #313030;
  --color-inverse-on-surface: #f4f0ef;
  --color-primary: #000000;
  --color-on-primary: #ffffff;
  --color-secondary: #5e5e5e;
  --color-on-secondary: #ffffff;
  --color-muted: #737373;
  --color-subtle: #808285;
  --color-accent: #b45309;

  /* Hairlines & Outlines */
  --color-outline: #747878;
  --color-outline-variant: #c4c7c7;
  --color-hairline: #e5e5e5;
  --color-hairline-dark: #262626;
  --color-hairline-light: rgba(26, 26, 26, 0.08);

  /* Fonts */
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-headline: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-sans: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Space Grotesk', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Spacings */
  --gutter: 1.5rem;
  --gutter-mobile: 0.75rem;
  --margin: 3rem;
  --margin-mobile: 1.25rem;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  background-color: var(--color-surface);
  color: var(--color-on-surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.55;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden !important;
}

::selection {
  background-color: #111111;
  color: #ffffff;
}

/* --- Typography Classes --- */
h1, h2, h3, h4, h5, h6, .font-heading {
  font-family: var(--font-headline);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.font-grotesk {
  font-family: var(--font-headline);
}

.font-sans {
  font-family: var(--font-body);
}

.font-jakarta {
  font-family: var(--font-sans);
}

.condensed-title {
  font-family: var(--font-headline);
  letter-spacing: -0.035em;
  line-height: 0.92;
}

.font-monolith-title {
  font-family: var(--font-headline);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.arch-code {
  font-family: var(--font-mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.font-label-uppercase {
  font-family: var(--font-headline);
  font-size: 0.6875rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.font-label-technical {
  font-family: var(--font-headline);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: 0.06em;
}

.tracking-architectural {
  letter-spacing: 0.16em;
}

.tracking-widestArchitect {
  letter-spacing: 0.22em;
}

/* --- Architectural Hairlines & Grid Lines --- */
.hairline-border-b {
  border-bottom: 1px solid var(--color-hairline);
}

.hairline-border-t {
  border-top: 1px solid var(--color-hairline);
}

.hairline-border-l {
  border-left: 1px solid var(--color-hairline);
}

.hairline-border-r {
  border-right: 1px solid var(--color-hairline);
}

.hairline-card {
  border: 1px solid var(--color-hairline);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.hairline-card:hover {
  border-color: rgba(26, 26, 26, 0.4);
  transform: translateY(-2px);
}

/* --- Atmospheric Overlay & Animations --- */
.backdrop-film {
  background: linear-gradient(180deg, rgba(17,17,17,0.55) 0%, rgba(17,17,17,0.2) 40%, rgba(17,17,17,0.85) 100%);
}

@keyframes heroZoom {
  0% {
    transform: scale(1.08);
    opacity: 0;
  }
  25% {
    opacity: 1;
  }
  100% {
    transform: scale(1.0);
    opacity: 1;
  }
}

.animate-hero-zoom {
  animation: heroZoom 5.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* --- Fullscreen Navigation Modal --- */
#fullscreenNav {
  transition: transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Studio Centered Navigation Links (template/done/menu) --- */
.nav-link {
  position: relative;
  display: inline-block;
  font-family: 'Space Grotesk', 'Plus Jakarta Sans', sans-serif;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), letter-spacing 0.35s ease, color 0.25s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0%;
  height: 3px;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #111111;
  transition: width 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-link:hover {
  letter-spacing: -0.01em;
  transform: translateY(-2px);
  color: #555555;
}

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

.nav-link.active-nav-link {
  color: #111111;
}

.nav-link.active-nav-link::after {
  width: 100%;
}

.close-btn {
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
}

.close-btn:hover {
  transform: rotate(90deg) scale(1.1);
  opacity: 0.7;
}

/* --- Header Styling --- */
.site-header {
  transition: background-color 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
}

.site-header.scrolled-light {
  background-color: rgba(253, 248, 248, 0.92);
  border-bottom: 1px solid var(--color-hairline);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.site-header.scrolled-dark {
  background-color: rgba(17, 17, 17, 0.92);
  border-bottom: 1px solid var(--color-hairline-dark);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* --- Architectural Buttons --- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.875rem 2rem;
  background-color: var(--color-monolith);
  color: #ffffff;
  font-family: var(--font-headline);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid var(--color-monolith);
  border-radius: 0;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  text-decoration: none;
}

.btn-primary:hover {
  background-color: #ffffff;
  color: var(--color-monolith);
  border-color: var(--color-monolith);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.875rem 2rem;
  background-color: transparent;
  color: var(--color-monolith);
  font-family: var(--font-headline);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid var(--color-monolith);
  border-radius: 0;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  text-decoration: none;
}

.btn-secondary:hover {
  background-color: var(--color-monolith);
  color: #ffffff;
}

.btn-dark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.875rem 2rem;
  background-color: #ffffff;
  color: var(--color-monolith);
  font-family: var(--font-headline);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid #ffffff;
  border-radius: 0;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  text-decoration: none;
}

.btn-dark:hover {
  background-color: transparent;
  color: #ffffff;
}

/* --- Filter Chips --- */
.filter-chip {
  cursor: pointer;
  border-radius: 0;
  font-family: var(--font-headline);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.5rem 1rem;
  transition: all 0.2s ease;
  border: 1px solid var(--color-hairline);
  background-color: #ffffff;
  color: var(--color-secondary);
}

.filter-chip:hover {
  color: var(--color-on-surface);
  border-color: var(--color-on-surface);
}

.filter-chip.active {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

/* --- Project Hover & Zoom --- */
.project-image-zoom {
  transition: transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1), filter 0.5s ease;
}

.project-item:hover .project-image-zoom {
  transform: scale(1.04);
}

/* --- Form Fields --- */
.arch-input {
  width: 100%;
  background-color: var(--color-surface-low);
  padding: 0.875rem 1rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--color-on-surface);
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  outline: none;
  transition: all 0.2s ease;
}

.arch-input:focus {
  border-bottom-color: var(--color-primary);
  background-color: var(--color-surface-container);
}

/* --- FAQ Accordion --- */
.faq-item {
  border-bottom: 1px solid var(--color-hairline);
  transition: background-color 0.2s ease;
}

.faq-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  padding: 1.5rem 0;
  cursor: pointer;
  background: none;
  border: none;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1), padding 0.3s ease;
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding-bottom: 1.5rem;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-icon {
  transition: transform 0.3s ease;
}