/* ============================================================
   AgencyOS Labs — Graphite & Signal
   ============================================================ */

/* ---------- Design tokens ---------- */
: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, 3.25rem);
  --text-hero: clamp(2.75rem, 1.4rem + 4.5vw, 5.5rem);

  --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-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.9rem;

  --content-narrow: 640px;
  --content-default: 1080px;

  --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);

  --font-display: 'Switzer', 'General Sans', -apple-system, sans-serif;
  --font-body: 'General Sans', -apple-system, 'Segoe UI', sans-serif;

  /* Brand constants (fixed regardless of mode) */
  --color-ink: #13161b;
  --color-ink-surface: #1c2128;
  --color-teal-light-bg: #0a8c82;
  --color-teal-dark-bg: #0fb5a8;

  /* Light (Paper) */
  --color-bg: #f6f5f1;
  --color-surface: #fbfaf7;
  --color-surface-2: #f1efe9;
  --color-border: #d7d4cc;
  --color-text: #13161b;
  --color-text-muted: #5a6068;
  --color-text-faint: #8b8f95;
  --color-primary: var(--color-teal-light-bg);
  --color-primary-hover: #076f67;
  --color-text-inverse: #f6f5f1;
  --color-text-inverse-muted: #9aa1a8;
  --shadow-sm: 0 1px 2px rgba(19, 22, 27, 0.06);
  --shadow-md: 0 8px 24px rgba(19, 22, 27, 0.08);
}

[data-theme='dark'] {
  --color-bg: #13161b;
  --color-surface: #1c2128;
  --color-surface-2: #21262e;
  --color-border: #2c313a;
  --color-text: #f2f1ec;
  --color-text-muted: #9aa1a8;
  --color-text-faint: #6d737b;
  --color-primary: var(--color-teal-dark-bg);
  --color-primary-hover: #2fd1c3;
  --color-text-inverse: #13161b;
  --color-text-inverse-muted: #5a6068;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.45);
}

/* ---------- Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  transition:
    background-color var(--transition-interactive),
    color var(--transition-interactive);
}

img,
svg {
  display: block;
  max-width: 100%;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  text-wrap: balance;
  line-height: 1.12;
  font-weight: 600;
  letter-spacing: -0.01em;
}

p,
li {
  text-wrap: pretty;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
  color: inherit;
}

ul[role='list'],
ol[role='list'] {
  list-style: none;
}

::selection {
  background: color-mix(in oklab, var(--color-primary) 30%, transparent);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4);
  z-index: 100;
}
.skip-link:focus {
  left: var(--space-4);
  top: var(--space-4);
}

/* ---------- Layout helpers ---------- */
.wrap {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
.wrap--narrow {
  max-width: var(--content-narrow);
}

.section {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
}
.section--contact {
  border-top: 1px solid var(--color-border);
}

.eyebrow {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.section__title {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-10);
  max-width: 20ch;
}
.lead {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 42ch;
  margin-bottom: var(--space-10);
}

/* ---------- Header ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-block: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}
.brand__mark {
  display: inline-flex;
  flex-shrink: 0;
}
.brand__word {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
}
.brand__word--sm {
  font-size: var(--text-base);
}
.brand__ink {
  color: var(--color-text);
}
.brand__teal {
  color: var(--color-primary);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
}
.nav a:hover {
  color: var(--color-text);
}
.nav__cta {
  color: var(--color-text) !important;
  font-weight: 600;
  border: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  transition:
    border-color var(--transition-interactive),
    background var(--transition-interactive);
}
.nav__cta:hover {
  border-color: var(--color-primary);
  background: color-mix(in oklab, var(--color-primary) 8%, transparent);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-muted);
  transition:
    background var(--transition-interactive),
    color var(--transition-interactive);
}
.theme-toggle:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

@media (max-width: 720px) {
  .nav a:not(.nav__cta) {
    display: none;
  }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding-block: clamp(var(--space-20), 14vw, var(--space-32)) clamp(var(--space-16), 8vw, var(--space-24));
  overflow: hidden;
}
.hero__inner {
  max-width: 760px;
}
.hero__title {
  font-size: var(--text-hero);
  margin-bottom: var(--space-6);
}
.hero__lead {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 46ch;
  margin-bottom: var(--space-10);
}
.hero__actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.signal {
  position: relative;
  margin-top: clamp(var(--space-10), 6vw, var(--space-16));
  height: 90px;
  opacity: 0.85;
}
.signal__svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}
.signal__path {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1600;
  stroke-dashoffset: 1600;
  animation: draw-signal 2.2s var(--ease-out) forwards;
  animation-delay: 0.3s;
}
.signal__dot {
  fill: var(--color-primary);
  opacity: 0;
  animation: dot-in 0.4s var(--ease-out) forwards;
  animation-delay: 2.4s;
}
@keyframes draw-signal {
  to {
    stroke-dashoffset: 0;
  }
}
@keyframes dot-in {
  to {
    opacity: 1;
  }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  border: 1px solid transparent;
  transition:
    background var(--transition-interactive),
    color var(--transition-interactive),
    border-color var(--transition-interactive),
    transform var(--transition-interactive),
    box-shadow var(--transition-interactive);
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn--primary:active {
  transform: translateY(0);
}
.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

/* ---------- Grid / Cards ---------- */
.grid {
  display: grid;
  gap: var(--space-6);
}
.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 860px) {
  .grid--3 {
    grid-template-columns: 1fr;
  }
}

.card {
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}
.card__index {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 700;
  margin-bottom: var(--space-4);
}
.card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}
.card p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
}

/* ---------- Form ---------- */
.form {
  display: grid;
  gap: var(--space-5);
  max-width: 560px;
}
.form__row {
  display: grid;
  gap: var(--space-2);
}
.form__row label {
  font-size: var(--text-sm);
  font-weight: 600;
}
.optional {
  font-weight: 400;
  color: var(--color-text-faint);
}
.form input,
.form textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  font-size: var(--text-base);
  resize: vertical;
  transition:
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive);
}
.form input:focus,
.form textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--color-primary) 18%, transparent);
}
.form__footer {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.form__status {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.form__status[data-state='success'] {
  color: var(--color-primary);
}
.form__status[data-state='error'] {
  color: #a84b2f;
}

.direct-email {
  margin-top: var(--space-8);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.direct-email a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: color-mix(in oklab, var(--color-primary) 40%, transparent);
}
.direct-email a:hover {
  text-decoration-color: var(--color-primary);
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-10);
}
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ---------- Scroll reveals (progressive enhancement) ---------- */
.reveal {
  opacity: 1;
}
@supports (animation-timeline: scroll()) {
  .reveal {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 55%;
  }
}
@keyframes reveal-fade {
  to {
    opacity: 1;
  }
}