/* ============================================================
   Alpha Attribute — Design System
   A PIAI Company | alphaattribute.com
   ============================================================ */

:root {
  /* Core Palette */
  --color-black:        #080b10;
  --color-deep:         #0e1520;
  --color-navy:         #1a2740;
  --color-navy-mid:     #243450;
  --color-navy-light:   #2d4469;

  /* Gold — shared with PIAI family */
  --color-gold:         #c9a962;
  --color-gold-light:   #dbc78a;
  --color-gold-dark:    #a88b3d;

  /* Alpha Signal — the accent that marks the alpha property */
  --color-alpha:        #e05c35;
  --color-alpha-light:  #f07a56;
  --color-alpha-dark:   #b84420;

  /* Neutrals */
  --color-slate:        #5a6b7d;
  --color-slate-light:  #8a9bab;
  --color-off-white:    #f5f4f0;
  --color-cream:        #faf9f5;
  --color-white:        #ffffff;
  --color-border:       rgba(201, 169, 98, 0.18);
  --color-border-subtle: rgba(255,255,255,0.08);

  /* Typography */
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  --font-accent:  'Montserrat', sans-serif;

  /* Type Scale */
  --text-xs:   0.72rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;
  --text-7xl:  4.5rem;

  /* Spacing */
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-5:  1.25rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  --sp-24: 6rem;
  --sp-32: 8rem;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.25);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.3);
  --shadow-lg:  0 12px 30px rgba(0,0,0,0.35);
  --shadow-xl:  0 24px 60px rgba(0,0,0,0.4);
  --shadow-gold: 0 0 40px rgba(201,169,98,0.12);

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.875rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --ease-fast: 150ms ease;
  --ease-base: 280ms cubic-bezier(0.4,0,0.2,1);
  --ease-slow: 500ms cubic-bezier(0.4,0,0.2,1);

  /* Layout */
  --max-w-sm:  640px;
  --max-w-md:  768px;
  --max-w-lg:  1024px;
  --max-w-xl:  1280px;
  --max-w-2xl: 1440px;
}

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

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-off-white);
  background: var(--color-deep);
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

/* ── Typography ── */
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--color-white);
}
h1 { font-size: clamp(2.2rem, 5vw, var(--text-6xl)); font-weight: 700; }
h2 { font-size: clamp(1.7rem, 3.5vw, var(--text-4xl)); font-weight: 700; }
h3 { font-size: clamp(1.2rem, 2.5vw, var(--text-2xl)); font-weight: 600; }
h4 { font-size: var(--text-lg); font-weight: 600; }

p { color: var(--color-slate-light); line-height: 1.8; }
p + p { margin-top: var(--sp-4); }

.lead {
  font-size: clamp(1.05rem, 2vw, var(--text-xl));
  color: rgba(245,244,240,0.85);
  line-height: 1.7;
}

em { font-style: italic; color: var(--color-gold-light); }
strong { font-weight: 700; color: var(--color-off-white); }

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--max-w-xl);
  margin-inline: auto;
  padding-inline: var(--sp-6);
}
.container--narrow { max-width: var(--max-w-md); }
.container--wide   { max-width: var(--max-w-2xl); }

.section {
  padding-block: var(--sp-24);
}
.section--sm  { padding-block: var(--sp-16); }
.section--lg  { padding-block: var(--sp-32); }

.section-header {
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: var(--sp-16);
}
.section-header p { margin-top: var(--sp-4); font-size: var(--text-lg); }

/* ── Grids ── */
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--sp-8); }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: var(--sp-6); }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--sp-5); }
.grid-2-1 { display: grid; grid-template-columns: 2fr 1fr; gap: var(--sp-10); }

@media (max-width: 768px) {
  .grid-2-1 { grid-template-columns: 1fr; }
}

/* ── Navigation ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--sp-4) 0;
  background: transparent;
  transition: background var(--ease-slow), box-shadow var(--ease-slow), padding var(--ease-slow);
  border-bottom: 1px solid transparent;
}
.navbar.scrolled {
  background: rgba(14, 21, 32, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-color: var(--color-border);
  padding: var(--sp-3) 0;
  box-shadow: 0 4px 24px rgba(0,0,0,0.4);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-w-xl);
  margin-inline: auto;
  padding-inline: var(--sp-6);
}

.nav-brand {
  display: flex;
  flex-direction: column;
  gap: 0;
  line-height: 1;
}
.nav-brand-name {
  font-family: var(--font-accent);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-white);
}
.nav-brand-sub {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
  font-weight: 500;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
}
.nav-link {
  font-family: var(--font-accent);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(245,244,240,0.8);
  transition: color var(--ease-fast);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0; right: 0;
  height: 1px;
  background: var(--color-gold);
  transform: scaleX(0);
  transition: transform var(--ease-base);
  transform-origin: left;
}
.nav-link:hover, .nav-link.active {
  color: var(--color-white);
}
.nav-link:hover::after, .nav-link.active::after {
  transform: scaleX(1);
}

.nav-cta {
  padding: var(--sp-2) var(--sp-5);
  background: var(--color-alpha);
  color: var(--color-white) !important;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  transition: background var(--ease-fast), transform var(--ease-fast);
}
.nav-cta::after { display: none; }
.nav-cta:hover { background: var(--color-alpha-light); transform: translateY(-1px); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--sp-2);
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  transition: transform var(--ease-base), opacity var(--ease-base);
}

@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    top: 0; right: -100%;
    width: min(320px, 90vw);
    height: 100vh;
    background: var(--color-deep);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--sp-20) var(--sp-8) var(--sp-8);
    border-left: 1px solid var(--color-border);
    transition: right var(--ease-slow);
    z-index: 999;
  }
  .nav-menu.open { right: 0; }
  .nav-menu li { width: 100%; border-bottom: 1px solid var(--color-border-subtle); }
  .nav-link { display: block; padding: var(--sp-4) 0; font-size: var(--text-base); }
  .nav-cta { margin-top: var(--sp-4); display: inline-block; }
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-4) var(--sp-8);
  border-radius: var(--radius-sm);
  font-family: var(--font-accent);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  transition: all var(--ease-base);
  cursor: pointer;
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--color-alpha);
  color: var(--color-white);
  border-color: var(--color-alpha);
}
.btn-primary:hover {
  background: var(--color-alpha-light);
  border-color: var(--color-alpha-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(224,92,53,0.35);
}
.btn-gold {
  background: var(--color-gold);
  color: var(--color-deep);
  border-color: var(--color-gold);
}
.btn-gold:hover {
  background: var(--color-gold-light);
  border-color: var(--color-gold-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(201,169,98,0.35);
}
.btn-outline {
  background: transparent;
  color: var(--color-off-white);
  border-color: rgba(245,244,240,0.35);
}
.btn-outline:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
  transform: translateY(-2px);
}
.btn-group { display: flex; flex-wrap: wrap; gap: var(--sp-4); align-items: center; }

/* ── Badges / Labels ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-1) var(--sp-4);
  border-radius: var(--radius-full);
  font-family: var(--font-accent);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.badge-gold {
  background: rgba(201,169,98,0.15);
  color: var(--color-gold-light);
  border: 1px solid rgba(201,169,98,0.3);
}
.badge-alpha {
  background: rgba(224,92,53,0.15);
  color: var(--color-alpha-light);
  border: 1px solid rgba(224,92,53,0.3);
}
.badge-subtle {
  background: rgba(255,255,255,0.08);
  color: var(--color-slate-light);
  border: 1px solid rgba(255,255,255,0.12);
}

/* ── Cards ── */
.card {
  background: rgba(255,255,255,0.035);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--sp-8);
  transition: transform var(--ease-base), border-color var(--ease-base), box-shadow var(--ease-base);
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(201,169,98,0.25);
  box-shadow: var(--shadow-lg);
}
.card--gold-top { border-top: 3px solid var(--color-gold); }
.card--alpha-top { border-top: 3px solid var(--color-alpha); }

.card-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-alpha);
  letter-spacing: 0.1em;
  margin-bottom: var(--sp-4);
}
.card-icon {
  font-size: 2rem;
  margin-bottom: var(--sp-4);
}
.card h3 { margin-bottom: var(--sp-3); }
.card p { font-size: var(--text-sm); }

/* ── Quote / Principle Blocks ── */
.principle-block {
  padding: var(--sp-10) var(--sp-12);
  border-left: 3px solid var(--color-gold);
  background: rgba(201,169,98,0.06);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  margin-block: var(--sp-8);
}
.principle-block .principle-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-gold);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--sp-3);
}
.principle-block h3 {
  font-size: clamp(1.15rem, 2.5vw, var(--text-2xl));
  margin-bottom: var(--sp-4);
}
.principle-block p { font-size: var(--text-base); }

@media (max-width: 600px) {
  .principle-block { padding: var(--sp-6) var(--sp-6); }
}

/* ── Stat / Data Display ── */
.stat-block { text-align: center; }
.stat-num {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw, var(--text-7xl));
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1;
  display: block;
}
.stat-label {
  font-family: var(--font-accent);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-slate-light);
  margin-top: var(--sp-2);
  display: block;
}

/* ── Dividers ── */
.divider {
  border: none;
  border-top: 1px solid var(--color-border-subtle);
  margin-block: var(--sp-12);
}
.divider-gold {
  border-color: rgba(201,169,98,0.2);
}

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

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(201,169,98,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201,169,98,0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 80% at 50% 50%, black 30%, transparent 100%);
}

.hero-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(224,92,53,0.12) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 820px;
  margin-inline: auto;
  padding-inline: var(--sp-6);
  padding-top: var(--sp-20);
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-8);
}

.hero h1 {
  margin-bottom: var(--sp-6);
  text-shadow: 0 2px 40px rgba(0,0,0,0.5);
}

.hero h1 .accent { color: var(--color-alpha); }
.hero h1 .gold   { color: var(--color-gold); }

.hero .lead {
  margin-bottom: var(--sp-10);
  max-width: 600px;
  margin-inline: auto;
}

.hero-scroll {
  position: absolute;
  bottom: var(--sp-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
  color: rgba(245,244,240,0.4);
  font-size: var(--text-xs);
  font-family: var(--font-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: bounce 2.5s infinite;
}
.hero-scroll::after {
  content: '';
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, rgba(201,169,98,0.5), transparent);
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ── Page Hero (inner pages) ── */
.page-hero {
  padding-top: calc(var(--sp-24) + 64px);
  padding-bottom: var(--sp-16);
  background: var(--color-black);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(201,169,98,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201,169,98,0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.5;
  mask-image: radial-gradient(ellipse 80% 100% at 50% 100%, black 10%, transparent 80%);
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { margin-top: var(--sp-4); margin-bottom: var(--sp-5); }
.page-hero .lead { max-width: 640px; }

/* ── Backgrounds ── */
.bg-deep   { background: var(--color-deep); }
.bg-navy   { background: var(--color-navy); }
.bg-black  { background: var(--color-black); }
.bg-card   { background: rgba(255,255,255,0.03); }
.bg-light  { background: var(--color-off-white); color: var(--color-navy); }
.bg-light h1, .bg-light h2, .bg-light h3, .bg-light h4 { color: var(--color-navy); }
.bg-light p { color: var(--color-slate); }
.bg-light .badge-subtle { background: rgba(26,39,64,0.08); color: var(--color-navy-mid); border-color: rgba(26,39,64,0.15); }
.bg-light .card {
  background: var(--color-white);
  border-color: rgba(0,0,0,0.08);
}
.bg-light .card:hover { border-color: var(--color-gold); }

/* ── Footer ── */
.footer {
  background: var(--color-black);
  border-top: 1px solid var(--color-border);
  padding-block: var(--sp-16) var(--sp-10);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--sp-12);
  margin-bottom: var(--sp-12);
}
.footer-brand-name {
  font-family: var(--font-accent);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: var(--sp-2);
}
.footer-brand-sub {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--sp-5);
}
.footer-desc { font-size: var(--text-sm); color: var(--color-slate); max-width: 280px; }

.footer-col-title {
  font-family: var(--font-accent);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--sp-5);
}
.footer-links { display: flex; flex-direction: column; gap: var(--sp-3); }
.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-slate);
  transition: color var(--ease-fast);
}
.footer-links a:hover { color: var(--color-off-white); }

.footer-bottom {
  border-top: 1px solid var(--color-border-subtle);
  padding-top: var(--sp-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-4);
}
.footer-bottom p, .footer-bottom a {
  font-size: var(--text-xs);
  color: var(--color-slate);
}
.footer-bottom a:hover { color: var(--color-off-white); }

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ── Animations ── */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }

/* ── Utilities ── */
.text-center   { text-align: center; }
.text-right    { text-align: right; }
.text-gold     { color: var(--color-gold); }
.text-alpha    { color: var(--color-alpha); }
.text-muted    { color: var(--color-slate-light); }
.text-sm       { font-size: var(--text-sm); }
.text-xs       { font-size: var(--text-xs); }
.uppercase     { text-transform: uppercase; letter-spacing: 0.08em; }
.font-mono     { font-family: var(--font-mono); }
.font-accent   { font-family: var(--font-accent); }
.mt-4  { margin-top: var(--sp-4); }
.mt-6  { margin-top: var(--sp-6); }
.mt-8  { margin-top: var(--sp-8); }
.mt-12 { margin-top: var(--sp-12); }
.mb-4  { margin-bottom: var(--sp-4); }
.mb-6  { margin-bottom: var(--sp-6); }
.mb-8  { margin-bottom: var(--sp-8); }
.mb-12 { margin-bottom: var(--sp-12); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .section { padding-block: var(--sp-16); }
  .section--lg { padding-block: var(--sp-20); }
  h1 { font-size: clamp(1.9rem, 7vw, 2.8rem); }
}
@media (max-width: 480px) {
  .btn { padding: var(--sp-3) var(--sp-6); }
  .container { padding-inline: var(--sp-4); }
}