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

:root {
  /* ── Light theme tokens ── */
  --bg: #f0ece3;
  --ink: #1a1814;
  --shadow: #1a1814;
  --border-color: #1a1814;
  --accent: #b8d8f8;
  --accent-dark: #8bbce8;
  --btn-vinted-bg: #09b46b;
  --btn-vinted-color: #f0ece3;
  --btn-tiktok-bg: #2a2a2a;
  --btn-tiktok-color: #f0ece3;

  /* ── Structural tokens (theme-agnostic) ── */
  --border: 2.5px solid var(--border-color);
  --radius: 8px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #2b2b2b;
    --ink: #f0ece3;
    --shadow: #0a0905;
    --border-color: #1a1814;
    --accent: #b8d8f8;
    --accent-dark: #8bbce8;
    --btn-vinted-bg: #09b46b;
    --btn-vinted-color: #f0ece3;
    --btn-tiktok-bg: #111111;
    --btn-tiktok-color: #f0ece3;
  }
}

:root[data-theme="dark"] {
  --bg: #2b2b2b;
  --ink: #f0ece3;
  --shadow: #0a0905;
  --border-color: #1a1814;
  --accent: #b8d8f8;
  --accent-dark: #8bbce8;
  --btn-vinted-bg: #09b46b;
  --btn-vinted-color: #f0ece3;
  --btn-tiktok-bg: #111111;
  --btn-tiktok-color: #f0ece3;
}

html {
  font-size: 18px;
}

body {
  background-color: var(--bg);
  color: var(--ink);
  font-family: "Syne", sans-serif;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 1.5rem;
}

main {
  max-width: 520px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ── Logo ── */
.brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  align-self: flex-start;
  margin-bottom: 1rem;
}

.logo {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: var(--border);
  box-shadow: 4px 4px 0 var(--shadow);
  display: block;
}

/* ── Intro text ── */
.intro {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.6;
  text-align: left;
  max-width: 520px;
  align-self: flex-start;
  margin-bottom: 2.5rem;
}

/* ── Link buttons ── */
.links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
}

.btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.4rem;
  background-color: var(--accent);
  color: var(--ink);
  border: var(--border);
  border-radius: var(--radius);
  box-shadow: 4px 4px 0 var(--shadow);
  text-decoration: none;
  font-family: "Syne", sans-serif;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  transition:
    transform 0.1s ease,
    box-shadow 0.1s ease;
  cursor: pointer;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--shadow);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--shadow);
}

.btn--vinted {
  background-color: var(--btn-vinted-bg);
  color: var(--btn-vinted-color);
}

.btn--tiktok {
  background-color: var(--btn-tiktok-bg);
  color: var(--btn-tiktok-color);
}

.btn--tiktok:hover {
  box-shadow: 6px 6px 0 var(--shadow);
}

.btn-icon {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
  stroke-width: 3;
}

/* ── Theme toggle ── */
.theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  background: none;
  border: 1.5px solid var(--border-color);
  border-radius: 50%;
  width: 1.75rem;
  height: 1.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 2px 2px 0 var(--shadow);
  color: var(--ink);
  transition:
    transform 0.1s ease,
    box-shadow 0.1s ease;
}

.theme-toggle:hover {
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0 var(--shadow);
}

.theme-toggle:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0 var(--shadow);
}

.theme-toggle svg {
  width: 0.75rem;
  height: 0.75rem;
  stroke-width: 2.5;
}

/* Light mode: show moon. Dark mode: show sun. */
#iconSun {
  display: none;
}
#iconMoon {
  display: block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) #iconSun {
    display: block;
  }
  :root:not([data-theme="light"]) #iconMoon {
    display: none;
  }
}

:root[data-theme="dark"] #iconSun {
  display: block;
}
:root[data-theme="dark"] #iconMoon {
  display: none;
}
:root[data-theme="light"] #iconSun {
  display: none;
}
:root[data-theme="light"] #iconMoon {
  display: block;
}

/* ── Responsive ── */
@media (max-width: 480px) {
  html {
    font-size: 16px;
  }

  .logo {
    width: 42px;
    height: 42px;
  }

  .intro {
    font-size: 1.2rem;
  }
}