/* Onboarding — Duolingo-style 5-step signup funnel.
   Single-page, single column, one step visible at a time, big chunky CTA. */

body.onboarding {
  background: #fff;
  min-height: 100vh;
  min-height: 100svh;
  margin: 0;
  display: flex;
  flex-direction: column;
  font-family: var(--font-body);
  color: var(--ink);
}

/* ---------- Header ---------- */
.ob-header {
  position: sticky;
  top: 0;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 22px 32px;
  background: #fff;
  border-bottom: 2px solid var(--line);
  z-index: 10;
}
.ob-brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
.ob-brand-icon { width: 36px; height: 36px; object-fit: contain; }
.ob-brand-word {
  font-family: "Outfit", var(--font-display);
  font-weight: 800;
  font-size: 26px;
  letter-spacing: -0.04em;
  color: var(--ink);
}
.ob-progress {
  height: 14px;
  background: var(--line-2);
  border: 2px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  max-width: 520px;
  margin: 0 auto;
  width: 100%;
}
.ob-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--green, #2BC489);
  border-radius: 999px;
  transition: width .35s cubic-bezier(.4,0,.2,1);
  box-shadow: inset 0 -3px 0 rgba(0,0,0,0.10);
}
.ob-skip {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mute);
  padding: 10px 14px;
  border-radius: 999px;
  transition: background .12s, color .12s;
}
.ob-skip:hover { background: var(--line-2); color: var(--ink); }

/* ---------- Main / steps ---------- */
.ob-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 56px 32px 96px;
}
.ob-step {
  width: 100%;
  max-width: 560px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 24px;
  animation: ob-fade-in .24s ease-out;
}
.ob-step[hidden] { display: none; }

@keyframes ob-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.ob-mascot {
  width: 180px;
  height: auto;
  margin-bottom: 4px;
  filter: drop-shadow(0 20px 32px rgba(15,15,20,0.10));
  user-select: none;
  -webkit-user-drag: none;
  pointer-events: none;
}
/* Mascot variant hooks — drop dedicated PNGs here when commissioned */
.ob-mascot-point { /* TODO swap to mascot-point.png */ }
.ob-mascot-cheer { /* TODO swap to mascot-cheer.png */ }

/* Welcome wave video — bg is already white in the source; the video sits
   directly on the white page. A subtle brightness/contrast nudge plus a
   tiny inward scale hides the AI generator's edge compression halo so the
   transition from video → page is invisible. */
.ob-mascot-wave {
  width: 608px;                    /* native source resolution */
  height: 640px;
  max-width: 100%;                 /* shrink on narrow screens to avoid overflow */
  height: auto;                    /* let height follow width when constrained */
  object-fit: contain;
  background: #fff;
  flex-shrink: 1;                  /* allow shrinking when the row is tight */
  transform: scale(1.04);          /* eat the ~5px slightly-dim edge ring */
  filter: brightness(1.01) contrast(1.005);
}

/* Step 1's step wrapper needs to be wider than the default 560px cap so the
   native-size mascot video + speech bubble fit on the same row. */
.ob-step[data-step="1"] {
  max-width: 980px;
}

/* Step 1 welcome — native-size mascot video + speech bubble.
   Wide enough on desktop for full 608px video + gap + 320px bubble. */
.ob-welcome {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;            /* bubble drops below the mascot on tight screens */
  gap: 24px;
  width: 100%;
  max-width: 980px;
}
.ob-welcome .ob-mascot {
  flex-shrink: 0;
  margin-bottom: 0;
}

/* Speech bubble — FIXED size so the typewriter never shifts the mascot.
   Reserve enough space for the full sentence + cursor in advance. */
.ob-bubble {
  position: relative;
  background: #fff;
  border: 2px solid var(--purple-ring);
  border-radius: 22px;
  padding: 18px 22px;
  box-shadow: 0 4px 0 var(--purple-ring);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;          /* fixed size so the reserved height calc stays correct */
  letter-spacing: -0.015em;
  color: var(--ink);
  line-height: 1.4;
  text-align: left;
  width: 320px;             /* hard width — bubble never grows */
  min-height: 116px;        /* reserves vertical space for ~3 lines at 19px / 1.4 */
  box-sizing: border-box;
  flex-shrink: 0;
  animation: ob-bubble-in .35s cubic-bezier(.4,0,.2,1) .2s both;
}
@keyframes ob-bubble-in {
  from { opacity: 0; transform: translateY(6px) scale(0.94); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
/* Triangle tail pointing left toward the mascot's mouth.
   ::before is the outer (border-coloured) triangle.
   ::after is the inner (white) triangle stacked on top to leave a border outline. */
.ob-bubble::before,
.ob-bubble::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 0;
  height: 0;
  border-style: solid;
}
.ob-bubble::before {
  left: -16px;
  margin-top: -12px;
  border-width: 12px 16px 12px 0;
  border-color: transparent var(--purple-ring) transparent transparent;
}
.ob-bubble::after {
  left: -13px;
  margin-top: -10px;
  border-width: 10px 14px 10px 0;
  border-color: transparent #fff transparent transparent;
}

.ob-bubble-text {
  white-space: pre-wrap;            /* preserve spaces during typewriter typing */
}
.ob-bubble-cursor {
  display: inline-block;
  width: 2px;
  height: 1.05em;
  background: var(--purple);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: ob-blink .8s steps(2, jump-none) infinite;
}
@keyframes ob-blink {
  50% { opacity: 0; }
}
.ob-bubble.is-done .ob-bubble-cursor {
  animation: none;
  opacity: 0.4;
}

@media (max-width: 600px) {
  .ob-welcome { flex-direction: column; gap: 12px; }
  .ob-welcome .ob-mascot { width: 140px; }
  /* Tail switches to point up (from below the mascot) on stacked mobile */
  .ob-bubble::before {
    left: 50%; top: -16px;
    margin-left: -12px; margin-top: 0;
    border-width: 0 12px 16px 12px;
    border-color: transparent transparent var(--purple-ring) transparent;
  }
  .ob-bubble::after {
    left: 50%; top: -13px;
    margin-left: -10px; margin-top: 0;
    border-width: 0 10px 14px 10px;
    border-color: transparent transparent #fff transparent;
  }
}

.ob-h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.035em;
  color: var(--ink);
  margin: 0;
  text-wrap: balance;
}
.ob-lede {
  font-size: 17px;
  color: var(--mute);
  line-height: 1.5;
  margin: 0;
  font-weight: 500;
  max-width: 42ch;
}
.ob-cta {
  margin-top: 12px;
  width: 100%;
  max-width: 360px;
}

/* ---------- Step 2: topic chips ---------- */
.ob-chips {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  width: 100%;
  max-width: 480px;
}
.ob-chip {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  background: #fff;
  border: 2px solid var(--line);
  border-radius: var(--r-lg);
  text-align: left;
  cursor: pointer;
  transition: border-color .12s, background .12s, transform .08s, box-shadow .12s;
  box-shadow: 0 3px 0 var(--line);
}
.ob-chip:hover { border-color: var(--purple-ring); }
.ob-chip.is-selected {
  border-color: var(--purple);
  background: var(--purple-soft);
  box-shadow: 0 3px 0 var(--purple);
}
.ob-chip-emoji { font-size: 22px; line-height: 1; flex-shrink: 0; }
.ob-chip-label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  color: var(--ink);
}

/* ---------- Step 3: mode cards (Quick vs Study) ---------- */
.ob-modes {
  display: flex;
  flex-direction: column;
  gap: 14px;
  width: 100%;
  max-width: 520px;
}
.ob-mode-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: center;
  padding: 22px 24px;
  background: #fff;
  border: 2px solid var(--line);
  border-radius: var(--r-lg);
  cursor: pointer;
  text-align: left;
  transition: border-color .12s, background .12s, box-shadow .12s, transform .08s;
  box-shadow: 0 3px 0 var(--line);
}
.ob-mode-card:hover { border-color: var(--purple-ring); }
.ob-mode-card.is-selected {
  border-color: var(--purple);
  background: var(--purple-soft);
  box-shadow: 0 3px 0 var(--purple);
}
.ob-mode-emoji {
  font-size: 38px;
  line-height: 1;
}
.ob-mode-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.ob-mode-label {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.ob-mode-sub {
  font-size: 13px;
  color: var(--mute);
  font-weight: 500;
  line-height: 1.5;
}
.ob-mode-card.is-selected .ob-mode-label { color: var(--purple); }

/* ---------- Step 4: language pills ---------- */
.ob-langs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  width: 100%;
  max-width: 480px;
}
.ob-lang {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: #fff;
  border: 2px solid var(--line);
  border-radius: var(--r-pill);
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  color: var(--ink);
  text-align: left;
  transition: border-color .12s, background .12s, box-shadow .12s;
  box-shadow: 0 3px 0 var(--line);
}
.ob-lang:hover { border-color: var(--purple-ring); }
.ob-lang.is-selected {
  border-color: var(--purple);
  background: var(--purple-soft);
  box-shadow: 0 3px 0 var(--purple);
  color: var(--purple);
}
.ob-lang .flag {
  width: 22px; height: 22px;
  border-radius: 999px;
  overflow: hidden;
  flex-shrink: 0;
  background-size: cover !important;
  background-position: 50% 50% !important;
}

/* ---------- Step 5: Google sign-in ---------- */
.ob-google {
  margin-top: 8px;
}
.ob-fine {
  font-size: 12px;
  color: var(--mute-2);
  max-width: 36ch;
  margin: 16px 0 0;
}
.ob-error {
  margin-top: 16px;
  padding: 10px 14px;
  border-radius: var(--r-md);
  background: #FEF2F2;
  border: 2px solid #FCA5A5;
  color: #B91C1C;
  font-size: 14px;
  font-weight: 600;
}

/* ---------- Back button (floats bottom-left) ---------- */
.ob-back {
  position: fixed;
  left: 24px;
  bottom: 24px;
  width: 56px;
  height: 56px;
  border-radius: 999px;
  background: #fff;
  border: 2px solid var(--line);
  box-shadow: 0 3px 0 var(--line);
  display: grid;
  place-items: center;
  color: var(--ink-2);
  cursor: pointer;
  transition: background .12s, border-color .12s, transform .08s, box-shadow .12s;
  z-index: 20;
}
.ob-back:hover {
  background: var(--line-2);
  border-color: var(--purple-ring);
}
.ob-back:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 var(--line);
}

/* ---------- Shared button styles (mirror landing-v2) ---------- */
body.onboarding .btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 16px 28px;
  border-radius: var(--r-pill);
  border: 2px solid transparent;
  transition: transform .08s, box-shadow .08s, background-color .12s, color .12s;
  cursor: pointer;
  line-height: 1;
}
body.onboarding .btn:active { transform: translateY(2px); }
body.onboarding .btn-primary {
  background: var(--purple);
  color: #fff;
  border-color: var(--purple);
  box-shadow: 0 4px 0 var(--purple-deep);
}
body.onboarding .btn-primary:hover { background: #7d4ff0; color: #fff; }
body.onboarding .btn-primary:active { box-shadow: 0 2px 0 var(--purple-deep); }
body.onboarding .btn-primary:disabled {
  background: var(--mute-2);
  border-color: var(--mute-2);
  box-shadow: 0 4px 0 var(--mute);
  cursor: not-allowed;
  opacity: 0.7;
}
body.onboarding .btn-primary:disabled:hover { background: var(--mute-2); }
body.onboarding .btn-lg { font-size: 17px; padding: 20px 36px; }
body.onboarding .btn-block { display: flex; width: 100%; }

/* ---------- Mobile ---------- */
@media (max-width: 600px) {
  .ob-header { padding: 14px 16px; gap: 12px; }
  .ob-skip { padding: 8px 10px; font-size: 12px; }
  .ob-brand-word { display: none; }
  .ob-main { padding: 32px 20px 80px; }
  .ob-mascot { width: 140px; }
  .ob-chips { grid-template-columns: 1fr; }
  .ob-back { left: 16px; bottom: 16px; width: 48px; height: 48px; }
}