/* ============================================================
   NU ARCHITECTURAL WINDOWS & DOORS — DESIGN SYSTEM
   nuarchsystems.com
   ============================================================ */

/* ---- RESET + BASE ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-body); color: var(--gray-800); background: var(--white); line-height: 1.6; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---- CSS VARIABLES ---- */
:root {
  --navy:       #0A1628;
  --navy-mid:   #152035;
  --navy-light: #1E2F4A;
  --aqua:       #38B2C8;
  --aqua-dark:  #2A95A8;
  --aqua-light: #5CC8DC;
  --aqua-pale:  #E0F4F8;
  --white:      #FFFFFF;
  --off-white:  #F5F8FA;
  --gray-50:    #F9FAFB;
  --gray-100:   #F3F4F6;
  --gray-200:   #E5E7EB;
  --gray-300:   #D1D5DB;
  --gray-400:   #9CA3AF;
  --gray-600:   #4B5563;
  --gray-700:   #374151;
  --gray-800:   #1F2937;
  --gray-900:   #111827;
  --gold:       #B8920A;

  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body:    'Inter', system-ui, -apple-system, sans-serif;

  --container: 1220px;
  --section-y:  96px;
  --section-y-sm: 64px;

  --radius-sm:  4px;
  --radius:     8px;
  --radius-lg:  16px;
  --radius-xl:  24px;

  --shadow-sm:   0 1px 3px rgba(0,0,0,0.10);
  --shadow-md:   0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg:   0 12px 40px rgba(0,0,0,0.14);
  --shadow-card: 0 2px 8px rgba(10,22,40,0.07), 0 8px 24px rgba(10,22,40,0.05);

  --transition: 0.22s ease;
  --header-h:   80px;
}

/* ---- TYPOGRAPHY ---- */
h1,h2,h3,h4,h5,h6 { font-family: var(--font-heading); font-weight: 600; line-height: 1.2; color: var(--navy); }
h1 { font-size: clamp(2.2rem, 4vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 3vw, 2.6rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.65rem); }
h4 { font-size: 1.15rem; }
h5 { font-size: 1rem; font-family: var(--font-body); font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: var(--aqua-dark); }
p { margin-bottom: 1rem; line-height: 1.75; }
p:last-child { margin-bottom: 0; }
strong { font-weight: 600; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-center { text-align: center; }
.text-white { color: var(--white) !important; }
.text-aqua  { color: var(--aqua); }
.text-navy  { color: var(--navy); }
.text-muted { color: var(--gray-600); }
.eyebrow { font-family: var(--font-body); font-size: 0.75rem; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase; color: var(--aqua); display: block; margin-bottom: 0.75rem; }
.eyebrow-light { color: var(--aqua-light); }

/* ---- LAYOUT ---- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: var(--section-y) 0; }
.section-sm { padding: var(--section-y-sm) 0; }
.section-dark { background: var(--navy); }
.section-mid  { background: var(--navy-mid); }
.section-light { background: var(--off-white); }
.section-white { background: var(--white); }

.grid { display: grid; gap: 1.5rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-gap { display: flex; gap: 1rem; flex-wrap: wrap; }
.gap-sm { gap: 0.75rem; }
.gap-md { gap: 1.5rem; }
.gap-lg { gap: 2.5rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-6 { margin-top: 3rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 2rem; }

/* ---- SKIP LINK ---- */
.skip-link { position: absolute; top: -100px; left: 0; background: var(--aqua); color: var(--white); padding: 12px 24px; z-index: 9999; font-weight: 600; border-radius: 0 0 var(--radius) 0; }
.skip-link:focus { top: 0; }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-h);
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  transition: box-shadow var(--transition), border-color var(--transition);
}
.site-header.scrolled { box-shadow: 0 2px 24px rgba(10,22,40,0.10); border-color: transparent; }
.site-header .container { height: 100%; display: flex; align-items: center; justify-content: space-between; }

/* Logo */
.logo-link { display: flex; align-items: flex-start; text-decoration: none; gap: 0; }
.logo-text { display: flex; flex-direction: column; line-height: 1; }
.logo-nu   { font-family: var(--font-heading); font-size: 2rem; font-weight: 700; color: var(--navy); letter-spacing: -0.02em; line-height: 0.95; }
.logo-arch { font-family: var(--font-body); font-size: 0.65rem; font-weight: 700; letter-spacing: 0.22em; color: var(--aqua-dark); text-transform: uppercase; line-height: 1.5; margin-top: 2px; }
.logo-wd   { font-family: var(--font-body); font-size: 0.55rem; font-weight: 400; letter-spacing: 0.14em; color: var(--gray-600); text-transform: uppercase; line-height: 1.5; }

/* Nav */
.site-nav { display: flex; align-items: center; gap: 0.25rem; }
.site-nav a { font-family: var(--font-body); font-size: 0.875rem; font-weight: 500; color: var(--gray-700); padding: 8px 12px; border-radius: var(--radius-sm); transition: color var(--transition), background var(--transition); }
.site-nav a:hover, .site-nav a.active { color: var(--navy); background: var(--gray-100); }
.nav-cta { background: var(--aqua) !important; color: var(--white) !important; padding: 9px 20px !important; border-radius: var(--radius) !important; font-weight: 600 !important; transition: background var(--transition), transform var(--transition), box-shadow var(--transition) !important; }
.nav-cta:hover { background: var(--aqua-dark) !important; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(56,178,200,0.35) !important; }

/* Mobile menu */
.mobile-menu-toggle { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; border-radius: var(--radius-sm); color: var(--navy); font-size: 1.25rem; transition: background var(--transition); }
.mobile-menu-toggle:hover { background: var(--gray-100); }
.mobile-nav { display: none; position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0; background: var(--white); padding: 1.5rem 24px; flex-direction: column; gap: 0.5rem; z-index: 99; overflow-y: auto; }
.mobile-nav.open { display: flex; }
.mobile-nav a { font-size: 1.1rem; font-weight: 500; padding: 14px 0; border-bottom: 1px solid var(--gray-100); color: var(--gray-800); }
.mobile-nav .nav-cta { border: none !important; background: var(--aqua) !important; color: var(--white) !important; border-radius: var(--radius) !important; padding: 14px 20px !important; text-align: center; margin-top: 1rem; }

/* ============================================================
   HERO SECTIONS
   ============================================================ */
.hero {
  padding-top: calc(var(--header-h) + 80px);
  padding-bottom: 80px;
  background: linear-gradient(155deg, var(--navy) 0%, var(--navy-mid) 60%, #0D2D3A 100%);
  position: relative;
  overflow: hidden;
  color: var(--white);
  min-height: 100vh;
  display: flex;
  align-items: center;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 75% 35%, rgba(56,178,200,0.12) 0%, transparent 55%),
              radial-gradient(ellipse at 20% 80%, rgba(56,178,200,0.06) 0%, transparent 50%);
  pointer-events: none;
}
.hero-pattern {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(56,178,200,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,178,200,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}
.hero .container { position: relative; z-index: 1; }
.hero-content { max-width: 760px; }
.hero h1 { color: var(--white); font-weight: 700; margin-bottom: 1.25rem; }
.hero h1 span { color: var(--aqua-light); }
.hero-sub { font-size: 1.15rem; color: rgba(255,255,255,0.82); margin-bottom: 2.5rem; max-width: 600px; line-height: 1.8; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; }

.hero-medium {
  padding-top: calc(var(--header-h) + 60px);
  padding-bottom: 60px;
  background: linear-gradient(155deg, var(--navy) 0%, var(--navy-mid) 100%);
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.hero-medium::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 80% 50%, rgba(56,178,200,0.10) 0%, transparent 60%);
}
.hero-medium .container { position: relative; z-index: 1; }
.hero-medium h1 { color: var(--white); margin-bottom: 1rem; }
.hero-medium .hero-sub { font-size: 1rem; color: rgba(255,255,255,0.78); }
.breadcrumb { display: flex; gap: 0.5rem; align-items: center; margin-bottom: 1.25rem; font-size: 0.8rem; color: rgba(255,255,255,0.55); }
.breadcrumb a { color: rgba(255,255,255,0.65); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--aqua-light); }
.breadcrumb span { color: rgba(255,255,255,0.35); }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 12px 28px; border-radius: var(--radius); font-family: var(--font-body); font-size: 0.9rem; font-weight: 600; transition: all var(--transition); cursor: pointer; text-decoration: none; letter-spacing: 0.01em; white-space: nowrap; }
.btn-primary { background: var(--aqua); color: var(--white); box-shadow: 0 2px 8px rgba(56,178,200,0.3); }
.btn-primary:hover { background: var(--aqua-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(56,178,200,0.4); }
.btn-secondary { background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,0.5); }
.btn-secondary:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.8); transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--aqua-dark); border: 2px solid var(--aqua); }
.btn-outline:hover { background: var(--aqua); color: var(--white); transform: translateY(-1px); }
.btn-navy { background: var(--navy); color: var(--white); }
.btn-navy:hover { background: var(--navy-mid); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--gray-700); border: 1px solid var(--gray-300); }
.btn-ghost:hover { background: var(--gray-50); border-color: var(--gray-400); }
.btn-sm { padding: 8px 18px; font-size: 0.82rem; }
.btn-lg { padding: 16px 36px; font-size: 1rem; }
.btn-icon { padding: 12px; border-radius: 50%; width: 44px; height: 44px; }

/* ============================================================
   POSITIONING BAR
   ============================================================ */
.positioning-bar { background: var(--white); border-top: 3px solid var(--aqua); padding: 1.5rem 0; }
.positioning-items { display: flex; gap: 2rem; flex-wrap: wrap; justify-content: center; align-items: center; }
.positioning-item { display: flex; align-items: center; gap: 0.6rem; font-size: 0.85rem; font-weight: 600; color: var(--navy); letter-spacing: 0.02em; }
.positioning-item::before { content: '◆'; color: var(--aqua); font-size: 0.5rem; }

/* ============================================================
   CARDS
   ============================================================ */
.card { background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); overflow: hidden; transition: transform var(--transition), box-shadow var(--transition); }
.card:hover { transform: translateY(-4px); box-shadow: 0 8px 32px rgba(10,22,40,0.12); }
.card-body { padding: 1.75rem; }
.card-image { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.card-img-placeholder { width: 100%; aspect-ratio: 16/9; background: linear-gradient(135deg, var(--navy-light) 0%, #1E3A4A 50%, var(--navy-mid) 100%); position: relative; }
.card-img-placeholder::after { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 60% 40%, rgba(56,178,200,0.18) 0%, transparent 60%); }

.solution-card { background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); overflow: hidden; transition: all var(--transition); text-decoration: none; color: inherit; display: flex; flex-direction: column; }
.solution-card:hover { transform: translateY(-5px); box-shadow: 0 12px 36px rgba(10,22,40,0.14); }
.solution-card:hover .card-link-arrow { color: var(--aqua); transform: translateX(4px); }
.solution-card-img { height: 200px; position: relative; overflow: hidden; }
.solution-card-body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
.solution-card-body h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
.solution-card-body p { font-size: 0.88rem; color: var(--gray-600); line-height: 1.65; flex: 1; }
.card-link-arrow { display: inline-flex; align-items: center; gap: 0.4rem; font-size: 0.85rem; font-weight: 600; color: var(--aqua-dark); margin-top: 1rem; transition: all var(--transition); }

/* System cards (dark bg) */
.system-card { background: var(--navy-light); border: 1px solid rgba(56,178,200,0.15); border-radius: var(--radius-lg); padding: 2rem; color: var(--white); transition: all var(--transition); }
.system-card:hover { border-color: var(--aqua); background: rgba(30,47,74,0.9); transform: translateY(-3px); }
.system-card h3 { color: var(--white); margin-bottom: 0.75rem; }
.system-card p { color: rgba(255,255,255,0.75); font-size: 0.9rem; }
.system-badge { display: inline-block; background: rgba(56,178,200,0.15); color: var(--aqua-light); padding: 4px 12px; border-radius: 100px; font-size: 0.75rem; font-weight: 600; letter-spacing: 0.05em; margin-bottom: 1rem; }

/* Feature/pillar cards */
.pillar-card { text-align: center; padding: 2rem 1.5rem; }
.pillar-icon { width: 52px; height: 52px; background: var(--aqua-pale); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 1rem; }
.pillar-icon svg { width: 24px; height: 24px; color: var(--aqua-dark); }
.pillar-card h4 { margin-bottom: 0.5rem; font-size: 1rem; }
.pillar-card p { font-size: 0.875rem; color: var(--gray-600); }

/* Value card */
.value-card { padding: 1.5rem; border-left: 3px solid var(--aqua); background: var(--off-white); border-radius: 0 var(--radius) var(--radius) 0; }
.value-card h4 { font-size: 0.95rem; margin-bottom: 0.35rem; }
.value-card p { font-size: 0.85rem; color: var(--gray-600); margin: 0; }

/* ============================================================
   IMAGE PLACEHOLDERS (CSS-only premium backgrounds)
   ============================================================ */
.img-hero { background: linear-gradient(135deg, #0A1628 0%, #162235 40%, #1E3A4A 70%, #0A2530 100%); position: relative; min-height: 500px; border-radius: var(--radius-lg); overflow: hidden; }
.img-hero::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 60% 40%, rgba(56,178,200,0.18) 0%, transparent 60%); }
.img-aqua  { background: linear-gradient(135deg, #0A2535 0%, #1A4A5A 50%, #0D3545 100%); }
.img-light { background: linear-gradient(135deg, #E0F4F8 0%, #B8E8F0 50%, #CCEff5 100%); }
.img-arch-1 { background: linear-gradient(160deg, #0D1E30 0%, #1A3548 40%, #0F2535 70%, #152030 100%); }
.img-arch-2 { background: linear-gradient(145deg, #1A1A2E 0%, #16213E 50%, #0F3460 100%); }
.img-arch-3 { background: linear-gradient(155deg, #0A2535 0%, #0D3545 50%, #0A1628 100%); }
.img-arch-glow { position: absolute; inset: 0; background: radial-gradient(ellipse at 70% 30%, rgba(56,178,200,0.15) 0%, transparent 55%); }
.img-label { position: absolute; bottom: 12px; left: 12px; background: rgba(0,0,0,0.5); color: rgba(255,255,255,0.7); font-size: 0.7rem; padding: 4px 10px; border-radius: 100px; backdrop-filter: blur(6px); }

/* Aspect ratios */
.aspect-video { aspect-ratio: 16/9; }
.aspect-square { aspect-ratio: 1/1; }
.aspect-wide   { aspect-ratio: 21/9; }
.aspect-portrait { aspect-ratio: 3/4; }

/* ============================================================
   SECTION HEADERS
   ============================================================ */
.section-header { margin-bottom: 3rem; }
.section-header.center { text-align: center; }
.section-header h2 { margin-bottom: 1rem; }
.section-header p { font-size: 1.05rem; color: var(--gray-600); max-width: 640px; }
.section-header.center p { margin: 0 auto; }
.section-divider { width: 48px; height: 3px; background: var(--aqua); border-radius: 2px; margin: 1rem 0; }
.section-header.center .section-divider { margin: 1rem auto; }

/* ============================================================
   FEATURE LIST
   ============================================================ */
.feature-list { list-style: none; display: flex; flex-direction: column; gap: 0.85rem; }
.feature-list li { display: flex; align-items: flex-start; gap: 0.75rem; font-size: 0.9rem; }
.feature-list li::before { content: '✓'; color: var(--aqua); font-weight: 700; flex-shrink: 0; margin-top: 1px; }
.feature-list-dark li { color: rgba(255,255,255,0.85); }
.feature-list-dark li::before { color: var(--aqua-light); }

/* ============================================================
   TABLES (Technical specs)
   ============================================================ */
.table-wrapper { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.spec-table { width: 100%; border-collapse: collapse; font-size: 0.875rem; background: var(--white); }
.spec-table th { background: var(--navy); color: var(--white); padding: 12px 16px; text-align: left; font-weight: 600; font-size: 0.8rem; letter-spacing: 0.04em; text-transform: uppercase; white-space: nowrap; }
.spec-table td { padding: 11px 16px; border-bottom: 1px solid var(--gray-100); vertical-align: top; line-height: 1.5; }
.spec-table tr:last-child td { border-bottom: none; }
.spec-table tr:hover td { background: var(--gray-50); }
.spec-table td:first-child { font-weight: 600; color: var(--gray-800); white-space: nowrap; }
.spec-table .value { color: var(--aqua-dark); font-weight: 600; }
.spec-table .note { font-size: 0.78rem; color: var(--gray-600); }

/* Comparison table */
.compare-table { width: 100%; border-collapse: collapse; }
.compare-table th { padding: 14px 20px; font-size: 0.8rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; }
.compare-table th:first-child { background: var(--gray-50); color: var(--gray-700); text-align: left; }
.compare-table th.col-aluminum { background: var(--navy); color: var(--white); }
.compare-table th.col-upvc { background: var(--navy-light); color: var(--white); }
.compare-table td { padding: 12px 20px; border-bottom: 1px solid var(--gray-100); font-size: 0.88rem; vertical-align: middle; }
.compare-table td:first-child { font-weight: 500; color: var(--gray-700); background: var(--gray-50); }
.compare-table tr:hover td { background: var(--gray-50); }
.compare-table tr:hover td:first-child { background: var(--gray-100); }
.compare-check { color: #16a34a; font-weight: 600; }
.compare-partial { color: var(--aqua-dark); }

/* ============================================================
   FORMS
   ============================================================ */
.form-group { margin-bottom: 1.25rem; }
.form-label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--gray-700); margin-bottom: 0.4rem; }
.form-label .req { color: var(--aqua-dark); margin-left: 2px; }
.form-input, .form-select, .form-textarea { width: 100%; padding: 11px 14px; border: 1.5px solid var(--gray-300); border-radius: var(--radius); font-family: var(--font-body); font-size: 0.9rem; color: var(--gray-800); background: var(--white); transition: border-color var(--transition), box-shadow var(--transition); line-height: 1.5; }
.form-input:focus, .form-select:focus, .form-textarea:focus { outline: none; border-color: var(--aqua); box-shadow: 0 0 0 3px rgba(56,178,200,0.18); }
.form-input::placeholder, .form-textarea::placeholder { color: var(--gray-400); }
.form-textarea { min-height: 110px; resize: vertical; }
.form-select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%234B5563' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-hint { font-size: 0.78rem; color: var(--gray-600); margin-top: 0.3rem; }
.form-error { font-size: 0.78rem; color: #dc2626; margin-top: 0.3rem; display: none; }
.form-group.has-error .form-input,
.form-group.has-error .form-select,
.form-group.has-error .form-textarea { border-color: #dc2626; }
.form-group.has-error .form-error { display: block; }

/* Checkbox + Radio */
.checkbox-group, .radio-group { display: flex; flex-direction: column; gap: 0.6rem; }
.checkbox-item, .radio-item { display: flex; align-items: flex-start; gap: 0.6rem; cursor: pointer; font-size: 0.9rem; }
.checkbox-item input, .radio-item input { width: 17px; height: 17px; accent-color: var(--aqua); flex-shrink: 0; margin-top: 2px; cursor: pointer; }
.checkbox-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 0.6rem; }

/* File upload */
.file-upload-area { border: 2px dashed var(--gray-300); border-radius: var(--radius-lg); padding: 2rem; text-align: center; cursor: pointer; transition: all var(--transition); background: var(--gray-50); }
.file-upload-area:hover { border-color: var(--aqua); background: var(--aqua-pale); }
.file-upload-area.dragging { border-color: var(--aqua); background: var(--aqua-pale); }
.file-upload-icon { font-size: 2rem; color: var(--aqua); margin-bottom: 0.5rem; }
.file-list { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 1rem; }
.file-item { display: flex; align-items: center; justify-content: space-between; background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-sm); padding: 8px 12px; font-size: 0.82rem; }
.file-item-name { font-weight: 500; color: var(--gray-800); }
.file-item-remove { color: var(--gray-400); cursor: pointer; font-size: 1rem; transition: color var(--transition); }
.file-item-remove:hover { color: #dc2626; }

/* Multi-step form */
.form-steps { display: flex; align-items: center; gap: 0; margin-bottom: 2.5rem; }
.step-item { flex: 1; display: flex; align-items: center; }
.step-num { width: 34px; height: 34px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.8rem; font-weight: 700; flex-shrink: 0; transition: all var(--transition); border: 2px solid var(--gray-300); color: var(--gray-400); background: var(--white); }
.step-item.active .step-num { border-color: var(--aqua); color: var(--aqua); }
.step-item.done .step-num { background: var(--aqua); border-color: var(--aqua); color: var(--white); }
.step-label { font-size: 0.75rem; font-weight: 600; color: var(--gray-400); margin-left: 0.5rem; white-space: nowrap; display: none; }
.step-connector { flex: 1; height: 2px; background: var(--gray-200); margin: 0 0.5rem; }
.step-connector.done { background: var(--aqua); }
.form-panel { display: none; }
.form-panel.active { display: block; }
.form-nav { display: flex; justify-content: space-between; align-items: center; margin-top: 2rem; }

/* Form card */
.form-card { background: var(--white); border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); padding: 2.5rem; max-width: 760px; margin: 0 auto; }

/* ============================================================
   FAQ ACCORDION
   ============================================================ */
.faq-list { display: flex; flex-direction: column; gap: 0; border: 1px solid var(--gray-200); border-radius: var(--radius-lg); overflow: hidden; }
.faq-item { border-bottom: 1px solid var(--gray-200); }
.faq-item:last-child { border-bottom: none; }
.faq-question { width: 100%; text-align: left; padding: 1.25rem 1.5rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; font-weight: 600; font-size: 0.95rem; color: var(--gray-800); background: var(--white); transition: background var(--transition); cursor: pointer; }
.faq-question:hover { background: var(--gray-50); }
.faq-question.open { background: var(--aqua-pale); color: var(--navy); }
.faq-icon { color: var(--aqua); font-size: 1.25rem; flex-shrink: 0; transition: transform var(--transition); }
.faq-question.open .faq-icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-answer.open { max-height: 500px; }
.faq-answer-inner { padding: 0 1.5rem 1.25rem; font-size: 0.9rem; color: var(--gray-600); line-height: 1.75; }

/* ============================================================
   TECHNICAL DISCLAIMER
   ============================================================ */
.tech-disclaimer { background: var(--gray-50); border-left: 4px solid var(--aqua); border-radius: 0 var(--radius) var(--radius) 0; padding: 1rem 1.25rem; font-size: 0.8rem; color: var(--gray-600); line-height: 1.7; margin-top: 2rem; }
.tech-disclaimer strong { color: var(--gray-700); }

/* ============================================================
   PERFORMANCE PILLARS
   ============================================================ */
.pillar-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1.5rem; }
.pillar { text-align: center; padding: 1.5rem 1rem; }
.pillar-circle { width: 64px; height: 64px; border-radius: 50%; border: 2px solid rgba(56,178,200,0.35); background: rgba(56,178,200,0.08); display: flex; align-items: center; justify-content: center; margin: 0 auto 0.85rem; }
.pillar-name { font-size: 0.82rem; font-weight: 600; color: var(--white); letter-spacing: 0.02em; }

/* ============================================================
   CTA SECTIONS
   ============================================================ */
.cta-section { background: linear-gradient(155deg, var(--navy) 0%, var(--navy-mid) 60%, #0D2D3A 100%); padding: 80px 0; text-align: center; position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 50% 60%, rgba(56,178,200,0.1) 0%, transparent 65%); }
.cta-section .container { position: relative; z-index: 1; }
.cta-section h2 { color: var(--white); margin-bottom: 1rem; }
.cta-section p { color: rgba(255,255,255,0.78); max-width: 560px; margin: 0 auto 2rem; font-size: 1.05rem; }
.cta-section .btn-group { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ============================================================
   AUDIENCE PATHS
   ============================================================ */
.audience-card { background: var(--white); border-radius: var(--radius-lg); padding: 2rem; border-top: 4px solid var(--aqua); box-shadow: var(--shadow-card); transition: all var(--transition); }
.audience-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.audience-card h3 { font-size: 1.2rem; margin-bottom: 0.75rem; }
.audience-card p { font-size: 0.9rem; color: var(--gray-600); }

/* ============================================================
   RESOURCE CARDS
   ============================================================ */
.resource-card { background: var(--white); border-radius: var(--radius-lg); padding: 1.75rem; box-shadow: var(--shadow-card); transition: all var(--transition); text-decoration: none; color: inherit; display: flex; flex-direction: column; gap: 1rem; }
.resource-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.resource-type { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--aqua-dark); }
.resource-card h4 { font-size: 1rem; line-height: 1.4; }
.resource-card p { font-size: 0.85rem; color: var(--gray-600); }
.resource-arrow { color: var(--aqua); font-size: 1.1rem; margin-top: auto; }

/* ============================================================
   TYPOLOGY / CONFIGURATION GRID
   ============================================================ */
.config-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 1rem; }
.config-item { background: var(--gray-50); border: 1px solid var(--gray-200); border-radius: var(--radius); padding: 1rem; text-align: center; transition: all var(--transition); }
.config-item:hover { border-color: var(--aqua); background: var(--aqua-pale); }
.config-icon { width: 48px; height: 48px; background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-sm); margin: 0 auto 0.6rem; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; }
.config-label { font-size: 0.8rem; font-weight: 600; color: var(--gray-700); }

/* ============================================================
   INLINE STATS / METRICS
   ============================================================ */
.stats-row { display: flex; gap: 2rem; flex-wrap: wrap; margin: 2rem 0; }
.stat { }
.stat-value { font-family: var(--font-heading); font-size: 2.5rem; font-weight: 700; color: var(--aqua); line-height: 1; }
.stat-label { font-size: 0.8rem; color: var(--gray-600); margin-top: 0.25rem; }
.stat-dark .stat-label { color: rgba(255,255,255,0.65); }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { background: var(--navy); color: var(--white); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1.25fr; gap: 3rem; margin-bottom: 3rem; }
.footer-brand .logo-nu { color: var(--white); font-size: 2rem; }
.footer-brand .logo-arch { color: var(--aqua-light); }
.footer-brand .logo-wd { color: rgba(255,255,255,0.5); }
.footer-tagline { color: rgba(255,255,255,0.75); font-size: 0.9rem; margin-top: 0.75rem; font-style: italic; }
.footer-desc { color: rgba(255,255,255,0.55); font-size: 0.82rem; line-height: 1.75; margin-top: 0.75rem; }
.footer-col h4 { font-family: var(--font-body); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--aqua-light); margin-bottom: 1rem; }
.footer-col ul { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-col ul li a { font-size: 0.85rem; color: rgba(255,255,255,0.65); transition: color var(--transition); }
.footer-col ul li a:hover { color: var(--white); }
.footer-cta-link { color: var(--aqua-light) !important; font-weight: 600; }
.footer-cta-link:hover { color: var(--white) !important; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 1.5rem 0; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.footer-bottom p { font-size: 0.78rem; color: rgba(255,255,255,0.45); margin: 0; }
.footer-legal-links { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.footer-legal-links a { font-size: 0.78rem; color: rgba(255,255,255,0.45); transition: color var(--transition); }
.footer-legal-links a:hover { color: rgba(255,255,255,0.8); }

/* ============================================================
   NOTICE / ALERT BOXES
   ============================================================ */
.notice { padding: 1rem 1.25rem; border-radius: var(--radius); font-size: 0.875rem; line-height: 1.65; margin: 1.5rem 0; }
.notice-info { background: var(--aqua-pale); border-left: 4px solid var(--aqua); color: var(--navy-light); }
.notice-warning { background: #FFFBEB; border-left: 4px solid #F59E0B; color: #78350F; }

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn   { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideInLeft  { from { opacity: 0; transform: translateX(-24px); } to { opacity: 1; transform: translateX(0); } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.6; } }

.anim-fade-up   { opacity: 0; }
.anim-fade-up.visible   { animation: fadeInUp 0.6s ease forwards; }
.anim-fade      { opacity: 0; }
.anim-fade.visible      { animation: fadeIn 0.6s ease forwards; }

/* Stagger delays */
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0; }
.divider { height: 1px; background: var(--gray-200); margin: 2rem 0; }
.divider-aqua { height: 2px; background: var(--aqua); width: 48px; margin: 1rem 0; border-radius: 2px; }
.tag { display: inline-flex; align-items: center; padding: 4px 12px; background: var(--aqua-pale); color: var(--aqua-dark); border-radius: 100px; font-size: 0.75rem; font-weight: 600; letter-spacing: 0.04em; }
.tag-navy { background: rgba(10,22,40,0.08); color: var(--navy); }
.rounded { border-radius: var(--radius); }
.rounded-lg { border-radius: var(--radius-lg); }
.overflow-hidden { overflow: hidden; }
.relative { position: relative; }
.absolute { position: absolute; }
.inset-0 { inset: 0; }
.z-1 { z-index: 1; }
.w-full { width: 100%; }

/* Loading spinner */
.spinner { width: 20px; height: 20px; border: 2px solid rgba(255,255,255,0.3); border-top-color: var(--white); border-radius: 50%; animation: spin 0.7s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .footer-brand { grid-column: 1 / -1; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --section-y: 64px; --header-h: 70px; }
  .site-nav { display: none; }
  .mobile-menu-toggle { display: flex; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .positioning-items { gap: 1rem; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .cta-section .btn-group { flex-direction: column; align-items: center; }
  .stats-row { gap: 1.5rem; }
  .step-label { display: none !important; }
  .form-steps { justify-content: center; }
  h1 { font-size: clamp(1.8rem, 7vw, 2.6rem); }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .form-card { padding: 1.5rem; }
  .card-body { padding: 1.25rem; }
  .spec-table th, .spec-table td { padding: 10px 12px; font-size: 0.82rem; }
}

/* ============================================================
   PRINT
   ============================================================ */
@media print {
  .site-header, .site-footer, .cta-section, .mobile-menu-toggle { display: none !important; }
  body { font-size: 11pt; color: #000; }
  a { color: #000; }
  .hero, .hero-medium { background: #f0f0f0 !important; color: #000 !important; min-height: auto; padding: 20pt 0; }
  .hero h1, .hero-medium h1 { color: #000 !important; }
}

/* ============================================================
   FOCUS STYLES (accessibility)
   ============================================================ */
:focus-visible { outline: 3px solid var(--aqua); outline-offset: 3px; border-radius: 2px; }
.btn:focus-visible { outline-offset: 4px; }