/* =========================================================
   The Earthling — prototype styles
   ========================================================= */

:root {
  --bg: #0a0a12;
  --panel: rgba(8, 8, 20, 0.78);
  --panel-border: rgba(255, 255, 255, 0.12);
  --text: #f3f3f7;
  --text-muted: #b9b9c7;
  --accent: #ffd166;
  --accent-strong: #ffb703;
  --choice-bg: rgba(255, 255, 255, 0.06);
  --choice-bg-hover: rgba(255, 209, 102, 0.18);
  --footer-bg: rgba(0, 0, 0, 0.55);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  --radius: 14px;
  --footer-h: 44px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  /* dvh in supporting browsers handles iOS Safari's collapsing URL bar */
  height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", "Helvetica Neue", system-ui, -apple-system, "Segoe UI",
    Roboto, "Noto Sans", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow: hidden;
  /* prevent over-scroll bounce + iOS double-tap zoom on tap targets */
  overscroll-behavior: none;
  touch-action: manipulation;
}

#app {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
}

/* ---------- Screens ---------- */
.screen {
  position: absolute;
  inset: 0;
  bottom: var(--footer-h);
  display: none;
}

.screen.is-active {
  display: block;
  animation: screenIn 0.35s ease both;
}

/* Game screen: no opacity fade-in — it fights the black intro veil (nested opacity)
   and can leave the stage invisible; title screen keeps screenIn. */
#game-screen.is-active {
  animation: none;
  opacity: 1;
}

@keyframes screenIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ---------- Title screen ---------- */
#title-screen.is-active {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.title-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-color: #000;
}

.title-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
      ellipse at center,
      rgba(0, 0, 0, 0) 0%,
      rgba(0, 0, 0, 0.55) 80%
    ),
    linear-gradient(to bottom, rgba(0, 0, 0, 0.15), rgba(0, 0, 0, 0.45));
}

.title-overlay {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  padding: 32px;
  text-align: center;
}

.title-text {
  margin: 0;
  font-size: clamp(2.4rem, 7vw, 5rem);
  font-weight: 800;
  letter-spacing: 0.02em;
  color: #fff;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.6),
    0 2px 6px rgba(0, 0, 0, 0.55);
  animation: titleIn 0.8s ease-out both;
}

@keyframes titleIn {
  from {
    opacity: 0;
    transform: translateY(-12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- Buttons ---------- */
.primary-btn {
  appearance: none;
  border: none;
  background: var(--accent);
  color: #1a1a2a;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 14px 36px;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, background 0.2s ease, box-shadow 0.2s ease;
  animation: titleIn 1s ease-out 0.15s both;
}

.primary-btn:hover {
  background: var(--accent-strong);
  transform: translateY(-1px);
}

.primary-btn:active {
  transform: translateY(0);
}

.ghost-btn {
  appearance: none;
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.35);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.9rem;
  line-height: 1.2;
  min-height: 36px;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.ghost-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.7);
}

#lang-toggle-title {
  margin-top: 8px;
}

/* ---------- Game screen layout ----------
   We layer the dialogue panel on top of a full-bleed stage, so the aliens'
   lower halves can be hidden "behind" the panel (giving the peek-out look).
   NOTE: do NOT set `position` or `display` directly on #game-screen — both
   are inherited from `.screen` (position: absolute; inset: 0; ...).
   Overriding `position` to `relative` collapses the height to 0 because
   `.stage` and `.dialogue-panel` inside are themselves `position: absolute`. */

.stage {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background: #000;
}

.stage-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.stage-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0) 50%,
    rgba(0, 0, 0, 0.55) 100%
  );
}

/* ---------- Aliens ---------- */
.aliens {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.alien-slot {
  position: absolute;
  bottom: 15%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  pointer-events: none;
  z-index: 2;
}

.alien-slot--left {
  left: 0;
  width: 45%;
}

.alien-slot--right {
  right: 0;
  width: 45%;
}

.alien-slot .alien {
  position: relative;
  bottom: auto;
  left: auto;
  right: auto;
  width: clamp(120px, 28vw, 300px);
  max-width: 100%;
  height: auto;
  max-height: 68%;
  transform: translateX(0) scale(0.92);
  filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.55));
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1),
    filter 0.45s ease, opacity 0.45s ease;
  transform-origin: bottom center;
  will-change: transform;
  user-select: none;
  -webkit-user-drag: none;
}

/* Idle (both): stay in place — no entrance replay when returning to the game. */

/* Speaking: larger + brighter */
.alien-slot .alien.is-speaking {
  transform: translateX(0) scale(1.08);
  filter: drop-shadow(0 14px 22px rgba(0, 0, 0, 0.6))
    drop-shadow(0 0 22px rgba(255, 209, 102, 0.5)) brightness(1.1)
    saturate(1.12);
  z-index: 2;
}

/* Silent partner: smaller + dimmer */
.alien-slot .alien.is-dimmed {
  transform: translateX(0) scale(0.86);
  filter: drop-shadow(0 8px 14px rgba(0, 0, 0, 0.5)) brightness(0.62)
    saturate(0.78);
}

/* ---------- Dialogue panel ----------
   Fixed proportion (not auto) so the aliens' lower halves are reliably
   covered regardless of how much text the current passage has. */
.dialogue-panel {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  background: var(--panel);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid var(--panel-border);
  padding: 14px clamp(16px, 4vw, 40px) 18px;
  height: 46%;
  min-height: 260px;
  max-height: 60%;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.dialogue-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.dialogue-lines {
  flex: 1 1 auto;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-right: 4px;
}

.dialogue-line {
  font-size: clamp(0.95rem, 1.6vw, 1.15rem);
  line-height: 1.4;
  opacity: 0;
  transform: translateY(6px);
  animation: lineIn 0.4s ease-out forwards;
  padding: 2px 0;
}

@keyframes lineIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.dialogue-line[data-speaker="alien1"] .text {
  border-left: 3px solid rgba(110, 200, 130, 0.88);
  padding-left: 10px;
}

.dialogue-line[data-speaker="alien2"] .text {
  border-left: 3px solid rgba(255, 255, 255, 0.88);
  padding-left: 10px;
}

.dialogue-line[data-speaker="narrator"] {
  font-style: italic;
  color: var(--text-muted);
}

/* ---------- Choices ---------- */
.choices {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.choice-btn {
  appearance: none;
  text-align: left;
  background: var(--choice-bg);
  color: var(--text);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease,
    transform 0.1s ease;
  opacity: 0;
  transform: translateY(6px);
  animation: lineIn 0.35s ease-out forwards;
}

.choice-btn:hover {
  background: var(--choice-bg-hover);
  border-color: rgba(255, 209, 102, 0.55);
}

.choice-btn:active {
  transform: translateY(0) scale(0.99);
}

.choices-end {
  color: var(--text-muted);
  font-style: italic;
  padding: 6px 4px;
}

/* ---------- End-of-story email ---------- */
.end-email-panel {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 4px;
  border-top: 1px solid var(--panel-border);
}

/* Author `display` must not override the HTML `hidden` attribute. */
.end-email-panel[hidden],
.end-email-form[hidden],
.end-email-thanks[hidden],
.end-email-error[hidden] {
  display: none !important;
}

.end-email-lead {
  margin: 0;
  font-size: clamp(0.88rem, 1.4vw, 1rem);
  line-height: 1.35;
  color: var(--text-muted);
}

.end-email-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.end-email-label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.end-email-input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--panel-border);
  background: rgba(0, 0, 0, 0.35);
  color: var(--text);
  font: inherit;
  font-size: 1rem;
}

.end-email-input:focus {
  outline: none;
  border-color: rgba(255, 209, 102, 0.45);
}

.end-email-submit {
  align-self: flex-start;
  min-width: 120px;
}

.end-email-thanks,
.end-email-error {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.35;
}

.end-email-thanks {
  color: var(--accent);
}

.end-email-error {
  color: #ff8a8a;
}

/* ---------- Footer ---------- */
.app-footer {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: var(--footer-h);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--footer-bg);
  color: #e6e6f0;
  font-size: 0.85rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  z-index: 10;
}

.app-footer a {
  color: var(--accent);
  text-decoration: none;
}

.app-footer a:hover {
  text-decoration: underline;
}

.footer-sep {
  color: rgba(255, 255, 255, 0.4);
}

.footer-music-wrap {
  align-items: center;
  gap: 8px;
}

/* Author `display` must not override the HTML `hidden` attribute */
.footer-music-wrap[hidden] {
  display: none !important;
}

.footer-music-wrap:not([hidden]) {
  display: inline-flex;
}

.footer-music-btn {
  appearance: none;
  margin: 0;
  padding: 0 2px;
  border: none;
  background: transparent;
  color: var(--accent);
  font: inherit;
  font-size: inherit;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}

.footer-music-btn:hover {
  text-decoration: underline;
}

.footer-music-btn[aria-pressed="true"] {
  color: #fff5d6;
}

/* ---------- Responsive ----------
   Breakpoints:
   1. Phone portrait — tall dialogue; ship bg in a top strip (full art height,
      horizontal pan); aliens peek ~half over the panel edge.
   2. Phones / iPad split-view in landscape — very little vertical room;
      dialogue shrinks and aliens scale down.
   3. Tiny phones (≤ 360px) — title + tap targets; dialogue stays readable.
*/

/* ========================================================================
   Phones — portrait: dialogue height + matching top strip for the bg image
   (no vertical crop in the strip; width extends — pan in main.js).
   ======================================================================== */
@media (max-width: 640px) and (orientation: portrait) {
  #game-screen {
    --dialogue-panel-height: 54%;
  }

  .stage-bg {
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    height: calc(100% - var(--dialogue-panel-height));
    background-size: auto 100%;
    background-position: center bottom;
    background-repeat: no-repeat;
  }

  .stage-bg::after {
    /* Softer vignette so the art reads clearer on small screens */
    background: linear-gradient(
      to bottom,
      rgba(0, 0, 0, 0.12) 0%,
      rgba(0, 0, 0, 0) 35%,
      rgba(0, 0, 0, 0.35) 70%,
      rgba(0, 0, 0, 0.55) 100%
    );
  }

  /* Horizontal pan of the background (see wireStageBackgroundPan in main.js) */
  #game-screen.is-active .stage {
    touch-action: none;
  }

  .dialogue-panel {
    height: var(--dialogue-panel-height);
    min-height: 240px;
    max-height: 66%;
    padding: 10px clamp(12px, 4vw, 28px) 14px;
    gap: 8px;
  }

  .dialogue-lines {
    gap: 6px;
    min-height: 0;
  }

  .dialogue-line {
    font-size: clamp(0.9rem, 3.8vw, 1.05rem);
    line-height: 1.38;
  }

  .choice-btn {
    padding: 10px 14px;
    font-size: 0.95rem;
  }

  /* Bottom of slot ≈ top of dialogue: torsos/waists sit in the ship strip */
  .alien-slot {
    bottom: calc(var(--dialogue-panel-height) + 3%);
  }

  .alien-slot .alien {
    width: clamp(96px, 24vw, 200px);
    max-height: min(42vh, 300px);
  }
}

/* Anything short (landscape phones, split-view, etc.) */
@media (max-height: 500px) {
  .dialogue-panel {
    height: 56%;
    min-height: 0;
    max-height: 70%;
    padding: 10px clamp(12px, 3vw, 32px) 12px;
    gap: 8px;
  }
  .dialogue-line {
    padding: 2px 0;
    font-size: clamp(0.95rem, 1.6vh, 1.05rem);
  }
  .choice-btn {
    padding: 10px 14px;
    font-size: 0.95rem;
  }
  .alien-slot {
    bottom: 30%;
  }
  .alien-slot .alien {
    width: clamp(72px, 13vw, 160px);
    max-height: 88%;
  }
  .title-text {
    font-size: clamp(2rem, 6vh, 3.4rem);
  }
}

/* Tiny phones (e.g. iPhone SE 1st gen, ~320px wide) */
@media (max-width: 360px) {
  :root {
    --footer-h: 40px;
  }
  .title-text {
    font-size: 2rem;
  }
  .primary-btn {
    padding: 12px 24px;
    font-size: 1rem;
  }
  /* Narrow width only: same tall panel as ≤640 portrait (do not shrink height) */
  .dialogue-panel {
    min-height: 220px;
    padding: 8px clamp(10px, 3vw, 24px) 12px;
    gap: 6px;
  }
  .dialogue-lines {
    gap: 4px;
    min-height: 0;
  }
  .dialogue-line {
    font-size: 0.9rem;
    line-height: 1.35;
  }
  .choice-btn {
    padding: 10px 12px;
    font-size: 0.9rem;
  }
  .alien-slot .alien {
    width: clamp(92px, 23vw, 185px);
    max-height: min(40vh, 300px);
  }
  .app-footer {
    font-size: 0.78rem;
    gap: 6px;
  }
  .dialogue-header .ghost-btn {
    padding: 6px 12px;
    font-size: 0.82rem;
    min-height: 32px;
  }
}