/* ─────────────────────────────────────────────────────────
   David Hach — link-in-bio
   Brand: brand-identity.md is the source of truth.
   Two modes via [data-theme="dark"|"light"]; never mixed in one artifact.
   ───────────────────────────────────────────────────────── */

/* ── Self-hosted fonts (GDPR: no third-party calls) ────── */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/fonts/inter-latin-400-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("/fonts/inter-latin-500-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/fonts/inter-latin-600-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* Latin-extended subset — covers German diacritics, Polish, Czech, etc. */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/fonts/inter-latin-ext-400-normal.woff2") format("woff2");
  unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("/fonts/inter-latin-ext-500-normal.woff2") format("woff2");
  unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/fonts/inter-latin-ext-600-normal.woff2") format("woff2");
  unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "Instrument Sans";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("/fonts/instrument-sans-latin-500-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Instrument Sans";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/fonts/instrument-sans-latin-600-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Instrument Sans";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("/fonts/instrument-sans-latin-700-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Instrument Sans";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("/fonts/instrument-sans-latin-ext-500-normal.woff2") format("woff2");
  unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Instrument Sans";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/fonts/instrument-sans-latin-ext-600-normal.woff2") format("woff2");
  unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Instrument Sans";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("/fonts/instrument-sans-latin-ext-700-normal.woff2") format("woff2");
  unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

/* ── Mode tokens ───────────────────────────────────────── */
:root,
[data-theme="dark"] {
  --bg: #0A0A0A;
  --surface: #171717;
  --surface-2: #1F1F1F;
  --border: #2E2E2E;
  --border-strong: #3F3F3F;
  --text: #F5F5F4;
  --text-2: #A8A29E;
  --text-3: #78716C;
  --accent: #FF6A1A;
  --accent-hover: #FF8742;
  --accent-muted: rgba(255, 106, 26, 0.12);
  --accent-on: #0A0A0A;

  /* Mode-specific values */
  --thumb-stop-1: #1F1F1F;
  --thumb-stop-2: #0A0A0A;

  /* Primary CTA: filled accent in dark mode */
  --cta-bg: var(--accent);
  --cta-bg-hover: var(--accent-hover);
  --cta-fg: var(--accent-on);
  --cta-focus-ring: var(--text);

  /* Submit hover: turns accent in dark mode */
  --submit-hover-bg: var(--accent);
  --submit-hover-fg: var(--accent-on);
}

[data-theme="light"] {
  --bg: #FAFAF9;
  --surface: #F4F4F2;
  --surface-2: #EDEDEA;
  --border: #E5E5E2;
  --border-strong: #D4D4D1;
  --text: #0A0A0A;
  --text-2: #525252;
  --text-3: #737373;
  /* Brand rule: in light mode the accent IS the primary text color */
  --accent: #0A0A0A;
  --accent-hover: #1F1F1F;
  --accent-muted: rgba(10, 10, 10, 0.06);
  --accent-on: #FAFAF9;

  --thumb-stop-1: #EDEDEA;
  --thumb-stop-2: #F4F4F2;

  /* Primary CTA: filled near-black in light mode (no hue) */
  --cta-bg: #0A0A0A;
  --cta-bg-hover: #1F1F1F;
  --cta-fg: #FAFAF9;
  --cta-focus-ring: #0A0A0A;

  /* Submit hover: stays neutral in light mode */
  --submit-hover-bg: #0A0A0A;
  --submit-hover-fg: #FAFAF9;
}

:root {
  --font-display: "Instrument Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-body: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-pill: 999px;

  --container: 440px;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: var(--bg);
}
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
input { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  min-height: 100dvh;
  text-rendering: optimizeLegibility;
  transition: background-color 240ms var(--ease), color 240ms var(--ease);
}

/* ── A11y helpers ──────────────────────────────────────── */
.skip-nav {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.skip-nav:focus {
  left: 16px;
  top: 16px;
  width: auto;
  height: auto;
  padding: 8px 12px;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  z-index: 100;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* ── Page shell ────────────────────────────────────────── */
.page {
  min-height: 100dvh;
  display: flex;
  align-items: stretch;
  justify-content: center;
  padding: 18px 18px 22px;
}

@media (min-width: 720px) {
  .page { align-items: center; padding: 48px 24px; }
}

.stack {
  width: 100%;
  max-width: var(--container);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

@media (min-width: 720px) {
  .stack { gap: 12px; }
}


/* ── Top bar (tagline + theme toggle) ──────────────────── */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin: 0 4px 2px;
}

.tagline {
  margin: 0;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--text-2);
  line-height: 1.3;
  /* Truncate gracefully on very narrow viewports */
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1 1 auto;
  min-width: 0;
}

@media (min-width: 380px) {
  .tagline { font-size: 14px; }
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--r-pill);
  color: var(--text-2);
  background: transparent;
  border: 1px solid transparent;
  transition: color 160ms var(--ease), background 160ms var(--ease), border-color 160ms var(--ease);
}
.theme-toggle:hover {
  color: var(--text);
  background: var(--surface);
  border-color: var(--border);
}
.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.theme-toggle .icon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* ── Card primitives ───────────────────────────────────── */
.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 18px;
  transition:
    background-color 200ms var(--ease),
    border-color 200ms var(--ease),
    transform 200ms var(--ease);
}
@media (min-width: 720px) {
  .card { padding: 20px; }
}

.card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ── Latest Video card ─────────────────────────────────── */
.card--video {
  display: block;
  color: var(--text);
}

.card--video:hover {
  background: var(--surface-2);
  border-color: var(--border-strong);
}

.card-heading {
  margin: 0 0 2px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--text);
}
@media (min-width: 720px) {
  .card-heading { font-size: 24px; margin-bottom: 4px; }
}

.card-meta {
  margin: 0 0 10px;
  font-size: 12px;
  line-height: 1.4;
  color: var(--text-3);
  letter-spacing: 0.01em;
}
@media (min-width: 720px) {
  .card-meta { font-size: 13px; margin-bottom: 14px; }
}

.card-row {
  display: grid;
  grid-template-columns: clamp(88px, 34%, 128px) minmax(0, 1fr);
  gap: 12px;
  align-items: center;
}

.thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--surface-2);
  border: 1px solid var(--border);
}
.thumb svg, .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card-title {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--text);
  letter-spacing: -0.005em;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
@media (min-width: 720px) {
  .card-title { font-size: 15px; -webkit-line-clamp: 4; }
}

.card-arrow {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 14px;
  color: var(--text-3);
  transition: color 200ms var(--ease), transform 200ms var(--ease);
}
.card--video:hover .card-arrow {
  color: var(--text);
  transform: translate(2px, -2px);
}

/* Loading shimmer (thumb) */
.card--video[data-state="loading"] .thumb { position: relative; overflow: hidden; }
.card--video[data-state="loading"] .thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--accent-muted) 50%,
    transparent 100%
  );
  animation: shimmer 1.6s linear infinite;
  pointer-events: none;
}
@keyframes shimmer {
  from { transform: translateX(-100%); }
  to   { transform: translateX(100%); }
}

/* ── Newsletter ("Tap into my brain") ──────────────────── */
.card--lab {
  background: var(--surface);
  padding: 18px;
}
@media (min-width: 720px) {
  .card--lab { padding: 24px; }
}

.lab-title {
  margin: 0 0 2px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--text);
}
@media (min-width: 720px) {
  .lab-title { font-size: 24px; margin-bottom: 4px; }
}

.lab-sub {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--text-2);
  max-width: 36ch;
}
@media (min-width: 720px) {
  .lab-sub { font-size: 15px; margin-bottom: 18px; }
}

.lab-form {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: stretch;
  gap: 0;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 6px;
  transition: border-color 160ms var(--ease);
}
.lab-form:focus-within { border-color: var(--border-strong); }

.lab-input {
  background: transparent;
  border: 0;
  outline: 0;
  padding: 12px 14px;
  font-size: 15px;
  color: var(--text);
  min-width: 0;
}
.lab-input::placeholder { color: var(--text-3); }

.lab-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--r-sm);
  color: var(--text);
  background: var(--surface-2);
  transition: background 160ms var(--ease), color 160ms var(--ease), transform 160ms var(--ease);
}
.lab-submit:hover { background: var(--submit-hover-bg); color: var(--submit-hover-fg); }
.lab-submit:active { transform: scale(0.97); }
.lab-submit:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.lab-consent {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  margin: 10px 2px 0;
  font-size: 11px;
  line-height: 1.45;
  color: var(--text-2);
  cursor: pointer;
  user-select: none;
}
@media (min-width: 720px) {
  .lab-consent { font-size: 12px; line-height: 1.5; margin-top: 12px; }
}
.lab-consent input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  margin: 2px 0 0;
  border: 1px solid var(--border-strong);
  border-radius: 3px;
  background: var(--bg);
  cursor: pointer;
  display: grid;
  place-content: center;
  flex-shrink: 0;
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease);
}
.lab-consent input[type="checkbox"]:hover { border-color: var(--text-2); }
.lab-consent input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.lab-consent.is-missing input[type="checkbox"] {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-muted);
  animation: nudge 320ms var(--ease);
}
@keyframes nudge {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-3px); }
  40%, 80% { transform: translateX(3px); }
}
.lab-consent input[type="checkbox"]:checked {
  background: var(--text);
  border-color: var(--text);
}
.lab-consent input[type="checkbox"]:checked::after {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--bg);
  clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%);
}
.lab-consent a {
  color: var(--text);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
.lab-consent a:hover { color: var(--text-2); }

.lab-status {
  margin: 8px 2px 0;
  font-size: 12px;
  color: var(--text-2);
  min-height: 0;
}
.lab-status[hidden] { display: none; }
.lab-status[data-state="success"] { color: var(--text); font-weight: 500; }
[data-theme="dark"] .lab-status[data-state="success"] { color: var(--accent); }
.lab-status[data-state="error"] { color: #DC2626; }
[data-theme="dark"] .lab-status[data-state="error"] { color: #F87171; }

/* ── Socials ───────────────────────────────────────────── */
.socials {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 4px 0 0;
}

.social {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--r-pill);
  color: var(--text-2);
  background: transparent;
  transition: color 160ms var(--ease), background 160ms var(--ease);
}
.social:hover { color: var(--text); background: var(--surface); }
.social:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ── Primary CTA ───────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 13px 24px;
  background: var(--cta-bg);
  color: var(--cta-fg);
  border-radius: var(--r-pill);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.005em;
  transition: background 160ms var(--ease), transform 160ms var(--ease);
  will-change: transform;
}
@media (min-width: 720px) {
  .btn-primary { padding: 16px 24px; }
}
.btn-primary:hover { background: var(--cta-bg-hover); }
.btn-primary:active { transform: translateY(1px); }
.btn-primary:focus-visible { outline: 2px solid var(--cta-focus-ring); outline-offset: 2px; }
@media (max-width: 719px) {
  .btn-primary { padding: 14px 24px; }
}

/* ── Footer ────────────────────────────────────────────── */
.footer {
  text-align: center;
  margin-top: 4px;
  padding: 4px 0 0;
}
.footer p {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--text-3);
}
@media (min-width: 720px) {
  .footer { margin-top: 12px; padding: 8px 0; }
  .footer p { font-size: 12px; }
}
/* On mobile, push the footer to the bottom of the viewport so content above
   gets vertical breathing room instead of bunching at the top. */
@media (max-width: 719px) {
  .footer { margin-top: auto; padding-top: 12px; }
}
.footer-legal {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 4px !important;
}
.footer-legal a {
  color: var(--text-3);
  text-decoration: none;
  transition: color 160ms var(--ease);
}
.footer-legal a:hover { color: var(--text); }
.footer-legal span { color: var(--text-3); opacity: 0.6; }

/* ── Reduced motion ────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}

/* ── Print ─────────────────────────────────────────────── */
@media print {
  body { background: #fff; color: #000; }
  .btn-primary { background: #000; color: #fff; }
  .topbar { display: none; }
}