/* ============================================================
   AOG — Always Offer Guidance
   Design Tokens + Component Styles
   Dark-first technical consultancy aesthetic
   ============================================================ */

/* --- Fonts --- */
/* Satoshi for body (clean, technical), Cabinet Grotesk for display (bold, creative) */

/* --- Type Scale (fluid) --- */
: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) --- */
  --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 --- */
  --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);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);

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

  /* --- Fonts --- */
  --font-display: 'Cabinet Grotesk', 'Inter', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* ============================================================
   COLOR SYSTEM — Dark-first, amber accent
   AOG brand: deep, technical, warm signal
   ============================================================ */

/* Dark mode (DEFAULT) */
:root, [data-theme="dark"] {
  --color-bg:             #0a0a0a;
  --color-surface:        #161616;
  --mouse-glow:           rgba(200, 150, 78, 0.15);
  --mouse-glow-strong:   rgba(200, 150, 78, 0.25);
  --color-surface-2:      #1c1c1c;
  --color-surface-offset: #141414;
  --color-surface-dynamic:#222222;
  --color-divider:        #2a2a2a;
  --color-border:         #333333;

  --color-text:           #e0ddd8;
  --color-text-muted:     #8a8780;
  --color-text-faint:     #5a5854;
  --color-text-inverse:   #0e0e0e;

  --color-accent:         #ff5e00;
  --color-accent-hover:   #e05300;
  --color-accent-active:  #cc4c00;
  --color-accent-muted:   rgba(255, 94, 0, 0.15);

  --color-error:          #d16370;
  --color-success:        #6daa45;
  --color-warning:        #c8964e;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
}

/* Light mode */
[data-theme="light"] {
  --color-bg:             #f5f3ef;
  --color-surface:        #ffffff;
  --mouse-glow:           rgba(120, 90, 40, 0.08);
  --mouse-glow-strong:   rgba(120, 90, 40, 0.15);
  --color-surface-2:      #faf9f7;
  --color-surface-offset: #edeae5;
  --color-surface-dynamic:#e6e3de;
  --color-divider:        #d4d1ca;
  --color-border:         #c4c1ba;

  --color-text:           #1a1815;
  --color-text-muted:     #6b6860;
  --color-text-faint:     #9a978f;
  --color-text-inverse:   #f5f3ef;

  --color-accent:         #1877F2;
  --color-accent-hover:   #166ada;
  --color-accent-active:  #145dbf;
  --color-accent-muted:   rgba(24, 119, 242, 0.1);

  --color-error:          #a13544;
  --color-success:        #437a22;
  --color-warning:        #964219;

  --shadow-sm: 0 1px 2px rgba(26,24,21,0.06);
  --shadow-md: 0 4px 12px rgba(26,24,21,0.08);
  --shadow-lg: 0 12px 32px rgba(26,24,21,0.12);
}

/* System preference fallback */
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg:             #f5f3ef;
    --color-surface:        #ffffff;
    --color-surface-2:      #faf9f7;
    --color-surface-offset: #edeae5;
    --color-surface-dynamic:#e6e3de;
    --color-divider:        #d4d1ca;
    --color-border:         #c4c1ba;
    --color-text:           #1a1815;
    --color-text-muted:     #6b6860;
    --color-text-faint:     #9a978f;
    --color-text-inverse:   #f5f3ef;
    --color-accent:         #1877F2;
    --color-accent-hover:   #166ada;
    --color-accent-active:  #145dbf;
    --color-accent-muted:   rgba(24, 119, 242, 0.1);
    --color-error:          #a13544;
    --color-success:        #437a22;
    --color-warning:        #964219;
    --shadow-sm: 0 1px 2px rgba(26,24,21,0.06);
    --shadow-md: 0 4px 12px rgba(26,24,21,0.08);
    --shadow-lg: 0 12px 32px rgba(26,24,21,0.12);
  }
}

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

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

@media (min-width: 768px) {
  .container { padding-inline: var(--space-8); }
}

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-divider);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}


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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .header-inner { padding-inline: var(--space-8); }
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
}

.logo svg, .logo img {
  height: 32px;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  transition: filter 0.3s var(--ease-out);
}

[data-theme='dark'] .logo img {
  filter: invert(1);
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.nav-desktop {
  display: none;
  align-items: center;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .nav-desktop { display: flex; }
}

.nav-link {
  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;
  position: relative;
  padding: var(--space-1) 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width 0.3s var(--ease-out);
}

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

.nav-link:hover::after,
.nav-link--active::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  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-dynamic);
}

/* Mobile menu toggle */
.mobile-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-text-muted);
}

@media (min-width: 768px) {
  .mobile-toggle { display: none; }
}

.mobile-toggle:hover {
  color: var(--color-text);
}

/* Mobile nav */
.nav-mobile {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  position: absolute;
  top: 64px;
  left: 0;
  width: 100%;
  height: calc(100vh - 64px);
  background: var(--color-bg);
  z-index: 99;
  padding: var(--space-8) var(--space-4);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-10px);
  transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out), visibility 0.3s;
}

.nav-mobile--open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.nav-mobile .nav-link {
  font-size: var(--text-lg);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-divider);
}

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

.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding: var(--space-16) 0 var(--space-20);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(200, 150, 78, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(200, 150, 78, 0.04), transparent);
  pointer-events: none;
}

[data-theme="light"] .hero::before {
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(154, 110, 48, 0.06), transparent),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(154, 110, 48, 0.03), transparent);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6);
  color: var(--color-text);
}

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

.hero-description {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ============================================================
   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;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform var(--transition-interactive);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

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

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

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

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

.btn--brand {
  color: var(--brand);
  border: 1px solid color-mix(in srgb, var(--brand) 30%, transparent);
  background: color-mix(in srgb, var(--brand) 5%, transparent);
}

.btn--brand:hover {
  background: color-mix(in srgb, var(--brand) 15%, transparent);
  border-color: var(--brand);
}

.btn--ghost {
  background: transparent;
  color: var(--color-accent);
  padding: var(--space-2) var(--space-3);
}

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

/* ============================================================
   SECTIONS
   ============================================================ */

.section {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) 0;
}

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

.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 600px;
  line-height: 1.7;
}

/* ============================================================
   VALUE PROPS / WHAT WE DO
   ============================================================ */

.values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-10);
}

@media (min-width: 640px) {
  .values-grid { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 1024px) {
  .values-grid { grid-template-columns: 1fr 1fr 1fr; }
}

.value-card {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.value-card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.value-card__icon {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.value-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.value-card__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================================
   ABOUT / TWO-COLUMN SECTION
   ============================================================ */

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: center;
}

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

.about-image {
  aspect-ratio: 4/3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-dynamic);
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-text p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

.about-text p:last-child {
  margin-bottom: 0;
}

/* ============================================================
   WORK / FEATURED PROJECTS
   ============================================================ */

.work-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-10);
}

@media (min-width: 768px) {
  .work-grid {
    grid-template-columns: 1.2fr 0.8fr;
  }
}

.work-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  transition: border-color var(--transition-interactive), transform var(--transition-interactive), box-shadow var(--transition-interactive);
  text-decoration: none;
  color: var(--color-text);
  display: block;
}

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

.work-card__image {
  aspect-ratio: 16/9;
  background: var(--color-surface-dynamic);
  overflow: hidden;
}

.work-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out);
}

.work-card:hover .work-card__image img {
  transform: scale(1.03);
}

.work-card__body {
  padding: var(--space-5);
}

.work-card__tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.work-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.work-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================================
   JOURNAL / BLOG CARDS
   ============================================================ */

.journal-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-10);
}

@media (min-width: 640px) {
  .journal-grid { grid-template-columns: 1fr 1fr; }
}

.journal-card {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-text);
  display: block;
  transition: border-color var(--transition-interactive), transform var(--transition-interactive);
}

.journal-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.journal-card__date {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-3);
}

.journal-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.journal-card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================================
   TESTIMONIALS
   ============================================================ */

.testimonial {
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  max-width: 700px;
  margin-inline: auto;
}

.testimonial__text {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.7;
  font-style: italic;
  margin-bottom: var(--space-4);
}

.testimonial__text::before {
  content: '\201C';
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-accent);
  line-height: 0;
  vertical-align: -0.4em;
  margin-right: var(--space-1);
}

.testimonial__author {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

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

.site-footer {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-12) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}

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

.footer-brand p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-3);
  line-height: 1.6;
  max-width: 300px;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

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

.footer-col a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.footer-col a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-bottom a {
  color: var(--color-text-faint);
  text-decoration: none;
}

.footer-bottom a:hover {
  color: var(--color-text-muted);
}

/* ============================================================
   PAGE TEMPLATES
   ============================================================ */

.page-hero {
  padding: var(--space-16) 0 var(--space-12);
  text-align: left;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.page-hero p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 600px;
  line-height: 1.7;
}

/* Music page specific */
.music-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-top: var(--space-10);
}

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

.music-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.music-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.music-card__image {
  aspect-ratio: 1;
  background: var(--color-surface-dynamic);
  overflow: hidden;
}

.music-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.music-card__body {
  padding: var(--space-5);
}

.music-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.music-card__meta {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-family: var(--font-mono);
  margin-bottom: var(--space-3);
}

.music-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Codelabs page specific */
.build-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-top: var(--space-10);
}

.build-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-interactive);
}

@media (min-width: 768px) {
  .build-item {
    grid-template-columns: auto 1fr auto;
    align-items: center;
  }
}

.build-item:hover {
  border-color: var(--color-accent);
}

.build-item__number {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-accent);
  min-width: 48px;
}

.build-item__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.build-item__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.build-item__tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  background: var(--color-accent-muted);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

/* Contact form */
.contact-form {
  max-width: 540px;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  color: var(--color-text);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-muted);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

/* ============================================================
   SCROLL ANIMATIONS (CSS-only)
   ============================================================ */

.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); }
}

/* Stagger delay for children */
.stagger > *:nth-child(1) { animation-delay: 0ms; }
.stagger > *:nth-child(2) { animation-delay: 50ms; }
.stagger > *:nth-child(3) { animation-delay: 100ms; }
.stagger > *:nth-child(4) { animation-delay: 150ms; }
.stagger > *:nth-child(5) { animation-delay: 200ms; }
.stagger > *:nth-child(6) { animation-delay: 250ms; }

/* ============================================================
   GRID PATTERN (subtle background texture with mouse glow)
   ============================================================ */

.grid-pattern {
  position: relative;
  overflow: hidden;
}

.grid-pattern > .grid-pattern__grid,
.grid-pattern::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-divider) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-divider) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.25;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, black, transparent);
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, black, transparent);
}

/* Mouse glow effect - follows cursor */
.mouse-glow {
  position: fixed;
  left: -300px;
  top: -300px;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--mouse-glow) 0%, var(--mouse-glow-strong) 40%, transparent 70%);
  pointer-events: none;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.4s ease;
  mix-blend-mode: screen;
}

/* Hero content sits above the glow */
.hero .container {
  position: relative;
  z-index: 2;
}

/* Light mode adjusts blend mode */
[data-theme="light"] .mouse-glow {
  mix-blend-mode: multiply;
}

.grid-pattern:hover .mouse-glow,
.mouse-glow.active {
  opacity: 1;
}

/* Subtle grid cell highlight on hover */
.grid-pattern__cell {
  position: absolute;
  width: 60px;
  height: 60px;
  background: var(--mouse-glow-strong);
  opacity: 0;
  transition: opacity 0.15s ease;
  pointer-events: none;
  border-radius: 2px;
}

.grid-pattern:hover .grid-pattern__cell {
  opacity: 0.3;
}

/* ============================================================
   SUB-BRAND LABELS
   ============================================================ */

.sub-brand {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
}

.sub-brand--music {
  color: var(--color-accent);
}

.sub-brand--codelabs {
  color: var(--color-text-muted);
}

/* Inline code style for aog:codelabs */
.code-label {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  background: var(--color-accent-muted);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

/* ============================================================
   UTILITY
   ============================================================ */

.text-accent { color: var(--color-accent); }
.text-muted { color: var(--color-text-muted); }
.text-faint { color: var(--color-text-faint); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }

::view-transition-group(root) { animation-duration: 0.15s; }