/* Art direction: Professional real estate appraisal firm → Serious, trustworthy, authoritative
   Palette: Cool blue-gray foundation, warm gold/amber accent for CTAs
   Typography: DM Serif Display (authority, tradition) + Plus Jakarta Sans (modern readability)
   Density: Spacious/editorial — generous whitespace, let content breathe */

/* ===== FONTS ===== */
:root {
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'Plus Jakarta Sans', 'Helvetica Neue', sans-serif;
}

/* ===== TYPE SCALE ===== */
:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);
}

/* ===== SPACING ===== */
:root {
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
}

/* ===== COLOR PALETTE — R.D. Becker Valuation ===== */
/* Deep steel blue primary, warm gold accent, clean neutrals */

:root, [data-theme="light"] {
  /* Surfaces */
  --color-bg:               #f8f9fa;
  --color-surface:          #ffffff;
  --color-surface-2:        #f1f3f5;
  --color-surface-offset:   #e9ecef;
  --color-surface-offset-2: #dee2e6;
  --color-surface-dynamic:  #d5dbe1;
  --color-divider:          #ced4da;
  --color-border:           #bcc3ca;

  /* Text */
  --color-text:             #1a1d21;
  --color-text-muted:       #5c6370;
  --color-text-faint:       #9ca3ae;
  --color-text-inverse:     #f8f9fa;

  /* Primary — Deep Steel Blue */
  --color-primary:          #1a3a5c;
  --color-primary-hover:    #142d48;
  --color-primary-active:   #0e2035;
  --color-primary-highlight: #d0dbe7;

  /* Accent — Warm Gold/Amber */
  --color-accent:           #c5923a;
  --color-accent-hover:     #b07e2e;
  --color-accent-active:    #9a6b22;
  --color-accent-highlight: #f0e4cc;

  /* Error */
  --color-error:            #c0392b;
  --color-error-hover:      #a33025;
  --color-error-active:     #86271f;

  /* Success */
  --color-success:          #27ae60;
  --color-success-hover:    #1e8c4e;
  --color-success-active:   #166a3b;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 2px oklch(0.2 0.02 240 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.2 0.02 240 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.2 0.02 240 / 0.12);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;
}

/* DARK MODE */
[data-theme="dark"] {
  --color-bg:               #111518;
  --color-surface:          #181c21;
  --color-surface-2:        #1e2329;
  --color-surface-offset:   #252b32;
  --color-surface-offset-2: #2c333b;
  --color-surface-dynamic:  #353d47;
  --color-divider:          #2e3640;
  --color-border:           #3a4350;

  --color-text:             #d4d8dd;
  --color-text-muted:       #8a919a;
  --color-text-faint:       #5a6270;
  --color-text-inverse:     #111518;

  --color-primary:          #5a8ab5;
  --color-primary-hover:    #4a78a3;
  --color-primary-active:   #3b6590;
  --color-primary-highlight: #1e2d3d;

  --color-accent:           #d4a34e;
  --color-accent-hover:     #c5923a;
  --color-accent-active:    #b07e2e;
  --color-accent-highlight: #2e2820;

  --color-error:            #e07066;
  --color-error-hover:      #c0392b;
  --color-error-active:     #a33025;

  --color-success:          #5dba84;
  --color-success-hover:    #27ae60;
  --color-success-active:   #1e8c4e;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.25);
  --shadow-md: 0 4px 12px oklch(0 0 0 / 0.35);
  --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.45);
}

/* System preference fallback */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:               #111518;
    --color-surface:          #181c21;
    --color-surface-2:        #1e2329;
    --color-surface-offset:   #252b32;
    --color-surface-offset-2: #2c333b;
    --color-surface-dynamic:  #353d47;
    --color-divider:          #2e3640;
    --color-border:           #3a4350;

    --color-text:             #d4d8dd;
    --color-text-muted:       #8a919a;
    --color-text-faint:       #5a6270;
    --color-text-inverse:     #111518;

    --color-primary:          #5a8ab5;
    --color-primary-hover:    #4a78a3;
    --color-primary-active:   #3b6590;
    --color-primary-highlight: #1e2d3d;

    --color-accent:           #d4a34e;
    --color-accent-hover:     #c5923a;
    --color-accent-active:    #b07e2e;
    --color-accent-highlight: #2e2820;

    --color-error:            #e07066;
    --color-error-hover:      #c0392b;
    --color-error-active:     #a33025;

    --color-success:          #5dba84;
    --color-success-hover:    #27ae60;
    --color-success-active:   #1e8c4e;

    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.25);
    --shadow-md: 0 4px 12px oklch(0 0 0 / 0.35);
    --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.45);
  }
}

/* ===== SCROLL ANIMATIONS ===== */
.fade-in {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}

.reveal-up {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .reveal-up {
    clip-path: inset(100% 0 0 0);
    animation: reveal-clip linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
}

@keyframes reveal-clip {
  to { clip-path: inset(0 0 0 0); }
}

/* ===== GLOBAL COMPONENT STYLES ===== */

/* Container */
.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.container--narrow {
  max-width: var(--content-default);
}

/* Section spacing */
.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.4;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform var(--transition-interactive);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
}

.btn-primary:active {
  background: var(--color-accent-active);
}

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

.btn-secondary:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.btn-ghost:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

/* Cards */
.card {
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

/* Headings */
.heading-display {
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--color-text);
}

.heading-body {
  font-family: var(--font-body);
  font-weight: 700;
  color: var(--color-text);
}

/* Section headings */
.section-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

/* Divider */
.divider {
  height: 1px;
  background: var(--color-divider);
  border: none;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.06);
  transition: box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 0;
}

.logo-link:hover {
  color: var(--color-primary);
}

.logo-img {
  height: 44px;
  width: auto;
  display: block;
}

[data-theme="dark"] .logo-img {
  filter: brightness(1.3) saturate(0.85);
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  line-height: 1.2;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-interactive);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive),
              background var(--transition-interactive);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

/* Mobile nav */
.nav-hamburger {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  border-radius: var(--radius-md);
}

.nav-hamburger:hover {
  background: var(--color-surface-2);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 100;
  background: var(--color-bg);
  padding: var(--space-4);
  flex-direction: column;
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-8);
}

.mobile-nav-close {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  border-radius: var(--radius-md);
}

.mobile-nav-close:hover {
  background: var(--color-surface-2);
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mobile-nav-link {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  text-decoration: none;
  padding: var(--space-4) var(--space-2);
  border-bottom: 1px solid var(--color-divider);
  transition: color var(--transition-interactive);
}

.mobile-nav-link:hover {
  color: var(--color-accent);
}

@media (max-width: 767px) {
  .nav-desktop {
    display: none;
  }
  .nav-hamburger {
    display: flex;
  }
}

/* Footer */
.site-footer {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-12) var(--space-4) var(--space-6);
}

[data-theme="dark"] .site-footer {
  background: var(--color-surface);
  color: var(--color-text);
}

.footer-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

@media (max-width: 767px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

.footer-col h3 {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
  opacity: 0.7;
}

.footer-col p,
.footer-col a {
  font-size: var(--text-sm);
  line-height: 1.7;
  opacity: 0.85;
}

.footer-col a {
  color: inherit;
  text-decoration: none;
  transition: opacity var(--transition-interactive);
}

.footer-col a:hover {
  opacity: 1;
}

.footer-bottom {
  border-top: 1px solid oklch(from var(--color-text-inverse) l c h / 0.15);
  padding-top: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  opacity: 0.7;
}

[data-theme="dark"] .footer-bottom {
  border-top-color: var(--color-divider);
}

.footer-bottom a {
  color: inherit;
  text-decoration: none;
  transition: opacity var(--transition-interactive);
}

.footer-bottom a:hover {
  opacity: 1;
}

/* CTA Banner (shared) */
.cta-banner {
  background: var(--color-primary);
  padding: var(--space-12) var(--space-4);
  text-align: center;
}

[data-theme="dark"] .cta-banner {
  background: var(--color-surface-offset);
}

.cta-banner h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: #fff;
  margin-bottom: var(--space-6);
}

[data-theme="dark"] .cta-banner h2 {
  color: var(--color-text);
}

.cta-banner .btn-primary {
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-sm);
}

.cta-banner .btn-primary:hover {
  background: var(--color-accent-hover);
}

/* Page Hero (shared for inner pages) */
.page-hero {
  background: var(--color-primary);
  padding: clamp(var(--space-12), 8vw, var(--space-20)) var(--space-4);
  text-align: center;
}

[data-theme="dark"] .page-hero {
  background: var(--color-surface-offset);
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: #fff;
  margin-bottom: var(--space-3);
}

[data-theme="dark"] .page-hero h1 {
  color: var(--color-text);
}

.page-hero p {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.8);
  max-width: 50ch;
  margin-inline: auto;
}

[data-theme="dark"] .page-hero p {
  color: var(--color-text-muted);
}