/* ==========================================================================
   CLEAR ETHER — Design Tokens & Styles
   Navy/charcoal base, teal-cyan accent, technical-but-approachable consulting
   ========================================================================== */

/* --- Fonts ---
   Display: Satoshi (Fontshare) — geometric, precise, modern
   Body: General Sans (Fontshare) — clean, readable, professional
*/
:root {
  --font-display: 'Satoshi', 'Helvetica Neue', sans-serif;
  --font-body: 'General 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 (4px base) --- */
: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;
}

/* --- Radius & Transitions --- */
:root {
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ==========================================================================
   COLOR PALETTE — Clear Ether Brand
   Dark navy base with cool cyan/teal accent
   ========================================================================== */

/* Default: Dark mode (matches the brand's navy identity) */
:root, [data-theme="dark"] {
  --color-bg:             #0B0F1A;
  --color-surface:        #111827;
  --color-surface-2:      #1A2236;
  --color-surface-offset: #0E1322;
  --color-border:         #2A3450;
  --color-divider:        #1E2740;

  --color-text:           #E2E4EA;
  --color-text-muted:     #8B92A5;
  --color-text-faint:     #525B73;
  --color-text-inverse:   #0B0F1A;

  /* Primary: Steel blue — confident, technical, distinct from navy */
  --color-primary:        #5B9BD5;
  --color-primary-hover:  #4A86BF;
  --color-primary-active: #3A72A8;
  --color-primary-glow:   rgba(91, 155, 213, 0.12);

  /* Accent warm: For sparing contrast moments */
  --color-accent-warm:    #F0A060;

  --color-error:          #E05A6E;
  --color-success:        #4ADE80;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
}

[data-theme="light"] {
  --color-bg:             #F4F5F7;
  --color-surface:        #FFFFFF;
  --color-surface-2:      #F9FAFB;
  --color-surface-offset: #EBEDF2;
  --color-border:         #D1D5E0;
  --color-divider:        #E2E5EB;

  --color-text:           #111827;
  --color-text-muted:     #6B7280;
  --color-text-faint:     #9CA3AF;
  --color-text-inverse:   #F4F5F7;

  --color-primary:        #2B6CB0;
  --color-primary-hover:  #1E5A9A;
  --color-primary-active: #164980;
  --color-primary-glow:   rgba(43, 108, 176, 0.08);

  --color-accent-warm:    #C47A38;

  --color-error:          #DC2626;
  --color-success:        #16A34A;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg:             #F4F5F7;
    --color-surface:        #FFFFFF;
    --color-surface-2:      #F9FAFB;
    --color-surface-offset: #EBEDF2;
    --color-border:         #D1D5E0;
    --color-divider:        #E2E5EB;
    --color-text:           #111827;
    --color-text-muted:     #6B7280;
    --color-text-faint:     #9CA3AF;
    --color-text-inverse:   #F4F5F7;
    --color-primary:        #1A6B8A;
    --color-primary-hover:  #145572;
    --color-primary-active: #0F4460;
    --color-primary-glow:   rgba(26, 107, 138, 0.08);
    --color-accent-warm:    #C47A38;
    --color-error:          #DC2626;
    --color-success:        #16A34A;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  }
}


/* ==========================================================================
   LAYOUT
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

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

section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

/* ==========================================================================
   HEADER / NAV
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding-block: var(--space-5);
  background: oklch(from var(--color-bg) l c h / 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.logo-img {
  height: 36px;
  width: auto;
  flex-shrink: 0;
}

/* Show white logo on dark, navy logo on light */
:root .logo-img--light,
[data-theme="dark"] .logo-img--light { display: none; }
:root .logo-img--dark,
[data-theme="dark"] .logo-img--dark { display: block; }

[data-theme="light"] .logo-img--dark { display: none; }
[data-theme="light"] .logo-img--light { display: block; }

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) .logo-img--dark { display: none; }
  :root:not([data-theme]) .logo-img--light { display: block; }
}

.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: 0.02em;
}

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

.theme-toggle {
  color: var(--color-text-muted);
  padding: var(--space-2);
  border-radius: var(--radius-sm);
}

.theme-toggle:hover {
  color: var(--color-primary);
  background: var(--color-primary-glow);
}

/* Mobile nav */
.mobile-menu-btn {
  display: none;
  color: var(--color-text);
  padding: var(--space-2);
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-6);
    gap: var(--space-6);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}


/* ==========================================================================
   HERO
   ========================================================================== */

.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--space-20) + 60px);
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 780px;
}

.hero__tag {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.hero__tag::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--color-primary);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.hero__subtitle {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text-muted);
  max-width: 560px;
  margin-bottom: var(--space-10);
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-inverse);
  background: var(--color-primary);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-md);
  text-decoration: none;
  letter-spacing: 0.02em;
}

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

.hero__cta svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-interactive);
}

.hero__cta:hover svg {
  transform: translateX(3px);
}




/* ==========================================================================
   SERVICES
   ========================================================================== */

.services {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.section-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-bottom: var(--space-12);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

@media (max-width: 960px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .services-grid {
    grid-template-columns: 1fr;
  }
}

.service-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.service-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary), var(--shadow-md);
}

.service-card__icon {
  width: 44px;
  height: 44px;
  background: var(--color-primary-glow);
  border: 1px solid oklch(from var(--color-primary) l c h / 0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  color: var(--color-primary);
}

.service-card__icon svg {
  width: 22px;
  height: 22px;
}

.service-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.service-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}


/* ==========================================================================
   APPROACH
   ========================================================================== */

.approach {
  position: relative;
}

.approach-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

@media (max-width: 768px) {
  .approach-grid {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }
}

.approach-text {
  max-width: 480px;
}

.approach-text p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.approach-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.approach-step {
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.approach-step__num {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-glow);
  border: 1px solid oklch(from var(--color-primary) l c h / 0.2);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.approach-step__content h3 {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.approach-step__content p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}


/* ==========================================================================
   ABOUT / FOUNDER
   ========================================================================== */

.about {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.about-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-16);
  align-items: start;
}

@media (max-width: 768px) {
  .about-layout {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

.about-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.about-meta__stat {
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-divider);
}

.about-meta__stat-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
}

.about-meta__stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: var(--space-1);
}

.about-content h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.about-content p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

.about-content p strong {
  color: var(--color-text);
  font-weight: 600;
}


/* ==========================================================================
   CTA / CONTACT
   ========================================================================== */

.cta-section {
  text-align: center;
}

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

.cta-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.cta-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 520px;
  margin-inline: auto;
  margin-bottom: var(--space-8);
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-inverse);
  background: var(--color-primary);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-md);
  text-decoration: none;
  letter-spacing: 0.02em;
}

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

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  background: transparent;
  border: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-md);
  text-decoration: none;
  letter-spacing: 0.02em;
}

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


/* ==========================================================================
   FOOTER
   ========================================================================== */

.site-footer {
  padding-block: var(--space-10);
  border-top: 1px solid var(--color-divider);
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}

.footer-links a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--color-primary);
}


/* ==========================================================================
   ANIMATIONS — scroll reveal
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Stagger children */
.reveal-stagger > .reveal:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger > .reveal:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger > .reveal:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger > .reveal:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger > .reveal:nth-child(5) { transition-delay: 320ms; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}