/* ===== Reset / base ===== */
* { box-sizing: border-box; }
:root {
  --bg: #000;
  --text: #fff;
  --muted: #b5b6ba;
  --btn-bg: #ffffff;
  --btn-text: #000000;
  --field-bg: #ffffff;
  --field-text: #000000;
  --shadow: 0 8px 30px rgba(0,0,0,.35);
}

html, body { height: 100%; }
html { color-scheme: dark; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, Apple Color Emoji, Segoe UI Emoji;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Hide text labels visually, keep for a11y */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 1px, 1px); white-space: nowrap; border: 0;
}

/* ===== Splash ===== */
.splash {
  min-height: 100svh;
  padding: calc(env(safe-area-inset-top) + 28px) 16px calc(env(safe-area-inset-bottom) + 40px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(24px, 6vh, 56px);
  text-align: center;
}

.logo-splash {
  width: clamp(160px, 42vw, 320px);
  height: auto;
  display: block;
  filter: drop-shadow(0 10px 30px rgba(0,0,0,.6));
}

.btn-primary {
  width: min(92vw, 520px);
  height: 56px;
  border-radius: 28px;
  border: 0;
  outline: none;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: .2px;
  background: var(--btn-bg);
  color: var(--btn-text);
  box-shadow: var(--shadow);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

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

.link-muted {
  color: var(--muted);
  text-decoration: underline;
  font-size: 15px;
}

/* ===== Auth screens ===== */
.logo-top {
  display: block;
  width: clamp(56px, 9vw, 76px);
  height: auto;
  margin: max(16px, env(safe-area-inset-top)) auto 8px;
  opacity: .95;
  filter: drop-shadow(0 6px 18px rgba(0,0,0,.5));
}

.auth {
  min-height: calc(100svh - 90px);
  padding: 8px 16px calc(env(safe-area-inset-bottom) + 32px);
  display: grid;
  place-items: start center;
}

.auth-card {
  width: min(92vw, 720px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  margin-top: clamp(8px, 3vh, 24px);
}

.auth-card h1 {
  margin: 0;
  font-size: clamp(28px, 6vw, 42px);
  letter-spacing: .2px;
  text-align: center;
}

.form-stack {
  width: min(92vw, 680px);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.input {
  width: 100%;
  padding: 16px 18px;
  border-radius: 16px;
  border: 0;
  outline: none;
  background: var(--field-bg);
  color: var(--field-text);
  font-size: 17px; /* >=16px prevents iOS zoom */
  line-height: 1.2;
  box-shadow: var(--shadow);
}

/* remove iOS yellow autofill */
input:-webkit-autofill,
input:-webkit-autofill:focus {
  -webkit-box-shadow: 0 0 0 1000px var(--field-bg) inset !important;
  -webkit-text-fill-color: var(--field-text) !important;
  caret-color: var(--field-text) !important;
}

.muted {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 15px;
}
.muted a { color: #3ba7ff; }

/* Larger touch targets on wide screens */
@media (min-width: 768px) {
  .btn-primary { height: 60px; font-size: 19px; }
  .input { padding: 18px 20px; font-size: 18px; }
}