/* ============================================================
   URBAN QUANT — DESIGN SYSTEM
   Single source of truth for all visual decisions.
   To retheme or rebrand, edit only this file.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;700;900&family=DM+Sans:wght@300;400;500;600&family=DM+Mono:wght@400;500&display=swap');

:root {
  /* --- Brand Colors (from logo) --- */
  --color-slate:        #1E3340;
  --color-slate-mid:    #2D4A52;
  --color-slate-light:  #3D5A63;
  --color-green-deep:   #2E7D32;
  --color-green:        #3A9E3F;
  --color-green-light:  #4CAF50;
  --color-green-pale:   #E8F5E9;

  /* --- Neutrals --- */
  --color-white:        #F8F7F4;
  --color-off-white:    #EEF0EC;
  --color-fog:          #D4D9D7;
  --color-muted:        #8A9A97;
  --color-dark:         #111816;

  /* --- Semantic --- */
  --color-bg:           var(--color-slate);
  --color-bg-alt:       var(--color-slate-mid);
  --color-surface:      rgba(255,255,255,0.04);
  --color-surface-hover:rgba(255,255,255,0.07);
  --color-border:       rgba(255,255,255,0.08);
  --color-border-green: rgba(74,175,80,0.3);
  --color-text:         var(--color-white);
  --color-text-muted:   var(--color-muted);
  --color-accent:       var(--color-green-light);

  /* --- Typography --- */
  --font-display:  'Playfair Display', Georgia, serif;
  --font-body:     'DM Sans', sans-serif;
  --font-mono:     'DM Mono', monospace;

  --text-xs:    0.75rem;
  --text-sm:    0.875rem;
  --text-base:  1rem;
  --text-lg:    1.125rem;
  --text-xl:    1.25rem;
  --text-2xl:   1.5rem;
  --text-3xl:   2rem;
  --text-4xl:   2.75rem;
  --text-5xl:   3.75rem;
  --text-6xl:   5rem;

  /* --- Spacing --- */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* --- Layout --- */
  --container-max: 1200px;
  --container-narrow: 780px;
  --section-padding: var(--space-32) var(--space-8);

  /* --- Effects --- */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --shadow-card: 0 4px 32px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 40px rgba(74,175,80,0.15);
  --transition:  all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================================
   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);
  font-weight: 400;
  color: var(--color-text);
  background-color: var(--color-slate);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* ============================================================
   TYPOGRAPHY UTILITIES
   ============================================================ */
.display-xl {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, var(--text-6xl));
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.display-lg {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, var(--text-5xl));
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.display-md {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, var(--text-4xl));
  font-weight: 700;
  line-height: 1.15;
}

.text-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-green-light);
}

.text-muted { color: var(--color-text-muted); }
.text-green  { color: var(--color-green-light); }
.text-white  { color: var(--color-white); }

/* ============================================================
   LAYOUT UTILITIES
   ============================================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.container--narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.section {
  padding: var(--space-32) var(--space-8);
}

.section--alt {
  background-color: var(--color-slate-mid);
}

.section--dark {
  background-color: var(--color-dark);
}

/* ============================================================
   COMPONENT: BUTTON
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-green-light);
  color: var(--color-dark);
}

.btn--primary:hover {
  background: var(--color-green);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(74,175,80,0.35);
}

.btn--outline {
  background: transparent;
  color: var(--color-white);
  border: 1px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-green-light);
  color: var(--color-green-light);
}

.btn--lg {
  padding: var(--space-6) var(--space-12);
  font-size: var(--text-lg);
  border-radius: var(--radius-lg);
}

/* ============================================================
   COMPONENT: CARD
   ============================================================ */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: var(--transition);
}

.card:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-green);
  box-shadow: var(--shadow-glow);
}

/* ============================================================
   COMPONENT: DIVIDER
   ============================================================ */
.divider {
  width: 48px;
  height: 3px;
  background: var(--color-green-light);
  border-radius: 2px;
  margin: var(--space-6) 0;
}

/* ============================================================
   COMPONENT: BADGE
   ============================================================ */
.badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.badge--green {
  background: rgba(74,175,80,0.15);
  color: var(--color-green-light);
  border: 1px solid var(--color-border-green);
}

.badge--slate {
  background: rgba(255,255,255,0.08);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

/* ============================================================
   COMPONENT: FORM
   ============================================================ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
}

.form-input {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-white);
  transition: var(--transition);
  outline: none;
  width: 100%;
}

.form-input::placeholder { color: var(--color-muted); }

.form-input:focus {
  border-color: var(--color-green-light);
  background: rgba(255,255,255,0.08);
  box-shadow: 0 0 0 3px rgba(74,175,80,0.12);
}

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

select.form-input option {
  background: var(--color-slate-mid);
  color: var(--color-white);
}

/* ============================================================
   SCROLL ANIMATION BASE
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ============================================================
   NOISE TEXTURE OVERLAY
   ============================================================ */
.noise::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  opacity: 0.4;
}

/* ============================================================
   RESPONSIVE BREAKPOINTS
   ============================================================ */
@media (max-width: 768px) {
  :root {
    --section-padding: var(--space-16) var(--space-4);
  }

  .section { padding: var(--space-16) var(--space-4); }
  .container { padding: 0 var(--space-4); }
  .container--narrow { padding: 0 var(--space-4); }
}