/* ============================================================
   TRUEHOWELL TECH SOLUTIONS — DESIGN SYSTEM
   Brand: Navy #1B3A5C · Teal #01696F · Gold #C9970A
   ============================================================ */

/* ── 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;
}

/* ── FONTS ───────────────────────────────────────────────── */
:root {
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'DM Sans', 'Helvetica Neue', sans-serif;
}

/* ── BRAND COLORS — LIGHT MODE ───────────────────────────── */
:root, [data-theme="light"] {
  /* Brand Navy / Teal / Gold palette */
  --color-bg:              #F5F6F8;
  --color-surface:         #FFFFFF;
  --color-surface-2:       #F0F2F5;
  --color-surface-offset:  #E8ECF0;
  --color-divider:         #D0D6DE;
  --color-border:          #C8D0D8;

  --color-text:            #0F1B2A;
  --color-text-muted:      #4A5568;
  --color-text-faint:      #8A9BB0;
  --color-text-inverse:    #FFFFFF;

  /* Navy as primary */
  --color-primary:         #1B3A5C;
  --color-primary-hover:   #142D47;
  --color-primary-active:  #0E2034;
  --color-primary-light:   #E8EFF6;

  /* Teal as accent */
  --color-accent:          #01696F;
  --color-accent-hover:    #015459;
  --color-accent-active:   #013E43;
  --color-accent-light:    #E0F0F1;

  /* Gold as highlight */
  --color-gold:            #C9970A;
  --color-gold-hover:      #A87B08;
  --color-gold-active:     #855F05;
  --color-gold-light:      #FDF3D8;

  /* Semantic */
  --color-success:         #2E7D32;
  --color-error:           #C62828;

  /* Radius */
  --radius-sm:  0.25rem;
  --radius-md:  0.5rem;
  --radius-lg:  0.75rem;
  --radius-xl:  1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(27, 58, 92, 0.08);
  --shadow-md: 0 4px 16px rgba(27, 58, 92, 0.10);
  --shadow-lg: 0 12px 40px rgba(27, 58, 92, 0.14);
  --shadow-xl: 0 24px 64px rgba(27, 58, 92, 0.18);

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

/* ── BRAND COLORS — DARK MODE ────────────────────────────── */
[data-theme="dark"] {
  --color-bg:              #0A1525;
  --color-surface:         #0F1E30;
  --color-surface-2:       #142438;
  --color-surface-offset:  #192B42;
  --color-divider:         #1E3450;
  --color-border:          #243D5C;

  --color-text:            #E2E8F0;
  --color-text-muted:      #94A3B8;
  --color-text-faint:      #4A6080;
  --color-text-inverse:    #0A1525;

  --color-primary:         #4A8BB5;
  --color-primary-hover:   #5EA0CC;
  --color-primary-active:  #72B5E2;
  --color-primary-light:   #0F2A45;

  --color-accent:          #2AA8AE;
  --color-accent-hover:    #3BBEC4;
  --color-accent-active:   #4DD0D6;
  --color-accent-light:    #082830;

  --color-gold:            #E8B420;
  --color-gold-hover:      #F0C840;
  --color-gold-active:     #F8DC60;
  --color-gold-light:      #2A2000;

  --color-success:         #4CAF50;
  --color-error:           #EF5350;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.6);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:              #0A1525;
    --color-surface:         #0F1E30;
    --color-surface-2:       #142438;
    --color-surface-offset:  #192B42;
    --color-divider:         #1E3450;
    --color-border:          #243D5C;
    --color-text:            #E2E8F0;
    --color-text-muted:      #94A3B8;
    --color-text-faint:      #4A6080;
    --color-text-inverse:    #0A1525;
    --color-primary:         #4A8BB5;
    --color-primary-hover:   #5EA0CC;
    --color-primary-active:  #72B5E2;
    --color-primary-light:   #0F2A45;
    --color-accent:          #2AA8AE;
    --color-accent-hover:    #3BBEC4;
    --color-accent-active:   #4DD0D6;
    --color-accent-light:    #082830;
    --color-gold:            #E8B420;
    --color-gold-hover:      #F0C840;
    --color-gold-active:     #F8DC60;
    --color-gold-light:      #2A2000;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.6);
  }
}

/* ============================================================
   GLOBAL COMPONENTS
   ============================================================ */

/* ── HEADER / NAV ────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition-slow);
}

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

.nav-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

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

.nav-logo-svg {
  width: 44px;
  height: 44px;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav-logo-name {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-logo-tag {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.04em;
  padding: var(--space-1) 0;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-gold);
  transform: scaleX(0);
  transition: transform var(--transition-interactive);
  transform-origin: left;
}

.nav-links a:hover {
  color: var(--color-text);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

.nav-links a.active {
  color: var(--color-primary);
}

.nav-cta {
  font-size: var(--text-sm) !important;
  font-weight: 600 !important;
  color: var(--color-text-inverse) !important;
  background: var(--color-primary);
  padding: var(--space-2) var(--space-5) !important;
  border-radius: var(--radius-full);
  text-decoration: none;
}

.nav-cta::after {
  display: none !important;
}

.nav-cta:hover {
  background: var(--color-primary-hover) !important;
  color: var(--color-text-inverse) !important;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  cursor: pointer;
}

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

/* Mobile nav */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

.nav-hamburger span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--color-text);
  transition: transform var(--transition-interactive), opacity var(--transition-interactive);
}

.nav-hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

@media (max-width: 768px) {
  .nav-hamburger { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-divider);
    flex-direction: column;
    padding: var(--space-6) var(--space-8);
    gap: var(--space-5);
    align-items: flex-start;
    box-shadow: var(--shadow-lg);
  }
  .nav-links.open { display: flex; }
  .nav-links a { font-size: var(--text-base); }
  .nav-inner { padding: var(--space-4) var(--space-5); }
}

/* ── FOOTER ──────────────────────────────────────────────── */
.site-footer {
  background: var(--color-primary);
  color: rgba(255,255,255,0.85);
  padding: var(--space-16) var(--space-8) var(--space-10);
}

.footer-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-12);
}

.footer-brand .footer-tagline {
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-top: var(--space-3);
}

.footer-brand p {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.65);
  margin-top: var(--space-4);
  line-height: 1.6;
  max-width: 28ch;
}

.footer-col h4 {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-4);
}

.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-2); }

.footer-col ul a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.footer-col ul a:hover { color: #fff; }

.footer-bottom {
  max-width: var(--content-wide);
  margin: var(--space-10) auto 0;
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255,255,255,0.15);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-bottom p {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.45);
}

@media (max-width: 900px) {
  .footer-inner { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
}

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

/* ── BUTTONS ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all var(--transition-interactive);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.btn-accent {
  background: var(--color-accent);
  color: #fff;
  box-shadow: var(--shadow-md);
}

.btn-accent:hover {
  background: var(--color-accent-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.btn-gold {
  background: var(--color-gold);
  color: #fff;
  box-shadow: var(--shadow-md);
}

.btn-gold:hover {
  background: var(--color-gold-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

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

.btn-outline-light {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.5);
}

.btn-outline-light:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
}

.btn-lg {
  font-size: var(--text-base);
  padding: var(--space-4) var(--space-10);
}

/* ── SECTION SCAFFOLDING ────────────────────────────────── */
.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.section-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: var(--space-8);
}

.section-inner--narrow {
  max-width: var(--content-default);
  margin: 0 auto;
  padding-inline: var(--space-8);
}

.section-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-3);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.1;
  margin-bottom: var(--space-5);
}

[data-theme="dark"] .section-title {
  color: var(--color-text);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 60ch;
  margin-bottom: var(--space-12);
}

/* ── GOLD DIVIDER ────────────────────────────────────────── */
.gold-rule {
  width: 48px;
  height: 3px;
  background: var(--color-gold);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
}

/* ── CARDS ───────────────────────────────────────────────── */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* ── BADGE ───────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 2px var(--space-3);
  border-radius: var(--radius-full);
}

.badge-navy {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.badge-teal {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.badge-gold {
  background: var(--color-gold-light);
  color: var(--color-gold);
}

[data-theme="dark"] .badge-navy { background: var(--color-primary-light); color: var(--color-primary); }
[data-theme="dark"] .badge-teal { background: var(--color-accent-light); color: var(--color-accent); }
[data-theme="dark"] .badge-gold { background: var(--color-gold-light); color: var(--color-gold); }

/* ── REVEAL ANIMATIONS ──────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.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; }