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

:root {
  --blue:       #1A6CF5;
  --blue-dark:  #1358CC;
  --blue-light: #E8F0FF;
  --white:      #FFFFFF;
  --text-dark:  #1A1A2E;
  --text-mid:   #4A5568;
  --shadow:     0 8px 32px rgba(0,0,0,0.18);
  --radius:     20px;
  --transition: 0.45s cubic-bezier(.4,0,.2,1);
}

html, body {
  width: 100%;
  height: 100%;
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: #D0D8E8;
  overflow: hidden;
}

/* Blurred background */
.bg-blur {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 110%, #b8c6d6 0%, transparent 60%),
    radial-gradient(ellipse at 80% -10%,  #c8d4e4 0%, transparent 60%),
    #D0D8E8;
  z-index: 0;
}

/* ============================================================
   SCREENS  –  each is a fixed full-viewport layer
============================================================ */
.screen {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  z-index: 1;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
  transform: translateY(28px);
}

.screen.active {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

.screen.exit {
  opacity: 0;
  transform: translateY(-28px);
}

/* ============================================================
   LOGO
============================================================ */
.logo { margin-bottom: 12px; flex-shrink: 0; }
.logo-img { height: 34px; object-fit: contain; }

.logo-svg-fallback {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 15px;
  color: var(--white);
}

/* ============================================================
   SCREEN 1 – START  (fills entire viewport)
============================================================ */
#screen-start {
  padding: 0;
  align-items: center;
  justify-content: flex-end;
  padding-bottom: clamp(40px, 8vh, 72px);
  background: url('images/start.webp') center center / cover no-repeat;
}

.start-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  gap: 0;
}

.title-main {
  font-size: clamp(40px, 13vw, 76px);
  font-weight: 900;
  font-style: italic;
  text-align: center;
  line-height: 1.0;
  color: var(--white);
  /* outline / cartoon stroke */
  -webkit-text-stroke: 3px #1a3a9f;
  paint-order: stroke fill;
  text-shadow:
    3px  3px 0 #1a3a9f,
   -3px -3px 0 #1a3a9f,
    3px -3px 0 #1a3a9f,
   -3px  3px 0 #1a3a9f;
  flex-shrink: 0;
}

.giftbox {
  width: min(360px, 80vw);
  height: min(360px, 80vw);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.giftbox img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  animation: giftFloat 3s ease-in-out infinite;
}

.giftbox-fallback {
  font-size: min(130px, 32vw);
  line-height: 1;
  animation: giftFloat 3s ease-in-out infinite;
}

.giftbox img:not([src=""]) ~ .giftbox-fallback { display: none; }
.giftbox img[src=""] { display: none; }

@keyframes giftFloat {
  0%, 100% { transform: translateY(0)    scale(1);    }
  50%       { transform: translateY(-14px) scale(1.04); }
}

/* ============================================================
   SCREEN 2 – GUIDE  (fills entire viewport)
============================================================ */
#screen-guide {
  padding: 0 0 clamp(40px, 8vh, 72px);
  align-items: center;
  justify-content: flex-end;
  gap: 40px;
  background: url('images/guide.webp') center center / cover no-repeat;
}

.hand-icon {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hand-circle {
  width: min(160px, 40vw);
  height: min(160px, 40vw);
  border-radius: 50%;
  border: 3px solid #bbb;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: handPulse 1.8s ease-in-out infinite;
  position: relative;
}

.hand-circle::before {
  content: '';
  position: absolute;
  inset: -13px;
  border-radius: 50%;
  border: 2px dashed #aaa;
  animation: spinSlow 8s linear infinite;
}

.hand-emoji {
  font-size: min(72px, 18vw);
  animation: handTap 1.8s ease-in-out infinite;
  display: block;
}

@keyframes handPulse { 0%,100% { transform: scale(1);    } 50% { transform: scale(1.07); } }
@keyframes handTap   { 0%,100% { transform: translateY(0); } 50% { transform: translateY(8px); } }
@keyframes spinSlow  { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* ============================================================
   BUTTONS
============================================================ */
.btn {
  display: inline-block;
  padding: 20px 56px;
  border: none;
  border-radius: 50px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 1.5px;
  cursor: pointer;
  text-transform: uppercase;
  transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
  flex-shrink: 0;
}

.btn:active  { transform: scale(0.96) !important; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn--white {
  background: var(--white);
  color: var(--blue);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}
.btn--white:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(0,0,0,0.26); }

.btn--blue {
  background: var(--blue);
  color: var(--white);
  box-shadow: 0 4px 18px rgba(26,108,245,0.45);
}
.btn--blue:hover { background: var(--blue-dark); transform: translateY(-2px); }

/* full-width action button sitting below a card */
.btn--wide {
  width: calc(100% - 48px);
  max-width: 480px;
  margin: 0;
  padding: 18px 0;
  font-size: 17px;
}

.btn--sm { padding: 12px 32px; font-size: 14px; margin-top: 16px; }

/* ============================================================
   SCREEN TITLE  (shared by shuffle / result)
============================================================ */
.screen-title {
  font-family: 'Segoe UI Black', 'Arial Black', sans-serif;
  font-size: clamp(26px, 6.5vw, 42px);
  font-weight: 900;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-dark);
  padding: 48px 0 24px;
  flex-shrink: 0;
  -webkit-text-stroke: 1px rgba(0,0,0,0.07);
}

/* ============================================================
   SCREEN 3 – SHUFFLE  (carousel)
============================================================ */
#screen-shuffle {
  justify-content: center;
  gap: 28px;
  padding: 40px 32px;
  background: url('images/draw.webp') center center / cover no-repeat;
}

/* Logo at top of shuffle screen */
.screen-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.screen-logo img {
  height: 36px;
  width: auto;
  object-fit: contain;
}

/* The outer white card — fixed, never moves */
.carousel-viewport {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 340px;
  padding: 28px 24px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow: hidden;
  position: relative;
  flex-shrink: 0;
}

/* Clipping container: content slides inside here */
.carousel-inner {
  width: 100%;
  position: relative;
}

/* The sliding panel that holds image + name */
.carousel-card {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  user-select: none;
  will-change: transform, opacity;
}

.carousel-img-wrap {
  width: 100%;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  overflow: hidden;
  background: #f4f7ff;
}

.carousel-img-wrap img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
}

.carousel-name {
  font-size: clamp(16px, 4.5vw, 20px);
  font-weight: 700;
  text-align: center;
  color: var(--blue);
  line-height: 1.3;
  width: 100%;
}

/* Slide-out to left */
@keyframes slideOutLeft {
  from { transform: translateX(0);     opacity: 1; }
  to   { transform: translateX(-48px); opacity: 0; }
}
/* Slide-in from right */
@keyframes slideInRight {
  from { transform: translateX(48px); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}

.carousel-card.slide-out { animation: slideOutLeft  0.13s ease-in  forwards; transition: none; }
.carousel-card.slide-in  { animation: slideInRight  0.13s ease-out forwards; transition: none; }

/* Fast-shuffle flash */
.carousel-card           { transition: opacity 0.04s linear; }
.carousel-card.flash-out { opacity: 0; }

/* Winner glow on the outer viewport card */
.carousel-viewport.winner {
  border: 3px solid #FFD700;
  box-shadow: 0 0 0 6px rgba(255,215,0,0.4), var(--shadow);
  animation: winnerPop 0.55s cubic-bezier(.4,0,.2,1) forwards;
}

@keyframes winnerPop {
  0%   { transform: scale(1);    }
  40%  { transform: scale(1.06); }
  70%  { transform: scale(0.98); }
  100% { transform: scale(1.03); }
}

.shuffle-hint {
  flex-shrink: 0;
  font-size: clamp(14px, 3.5vw, 18px);
  color: var(--text-mid);
  letter-spacing: 0.5px;
  animation: hintPulse 1.4s ease-in-out infinite;
}

@keyframes hintPulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

/* Logo header — outside card, top of screen */
.screen-header-logo {
  height: 36px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
  z-index: 2;
  position: relative;
}

/* ============================================================
   SCREEN 4 – RESULT
============================================================ */
#screen-result {
  justify-content: center;
  gap: 24px;
  padding: 48px 32px 40px;
  background: #C8D3E8;
}

/* Confetti spans the whole screen */
.confetti-container {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 1;
}

.confetti-piece {
  position: absolute;
  border-radius: 2px;
  animation: confettiFall linear forwards;
  top: -10px;
}

@keyframes confettiFall {
  0%   { transform: translateY(0)     rotate(0deg);   opacity: 1; }
  100% { transform: translateY(110vh) rotate(720deg); opacity: 0; }
}

.result-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 24px 32px;
  width: 100%;
  max-width: 380px;
  gap: 20px;
  z-index: 2;
  position: relative;
}

.result-prize-img {
  width: min(260px, 70vw);
  height: min(220px, 55vw);
  object-fit: contain;
  animation: bounceIn 0.6s cubic-bezier(.4,0,.2,1);
}

.result-prize-name {
  font-size: clamp(20px, 5vw, 28px);
  font-weight: 700;
  color: var(--blue);
  text-align: center;
  line-height: 1.3;
}

@keyframes bounceIn {
  0%   { transform: scale(0.55); opacity: 0; }
  60%  { transform: scale(1.1);  opacity: 1; }
  100% { transform: scale(1);    }
}

/* ============================================================
   SCREEN 5 – QR
============================================================ */
#screen-qr {
  justify-content: center;
  gap: 24px;
  padding: 48px 32px 40px;
  background: #C8D3E8;
}

.qr-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 24px 32px;
  width: 100%;
  max-width: 380px;
  gap: 16px;
}

.qr-instruction {
  font-size: clamp(16px, 4.2vw, 22px);
  font-weight: 600;
  color: var(--text-dark);
  text-align: center;
  line-height: 1.5;
}

.qr-box {
  width: min(200px, 54vw);
  height: min(200px, 54vw);
  border-radius: 12px;
  overflow: hidden;
  background: #f0f0f0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-box img,
.qr-box canvas {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* ============================================================
   RESPONSIVE TWEAKS
============================================================ */

@media (min-width: 700px) {
  .carousel-viewport { max-width: 420px; }
}

/* Very small phones */
@media (max-width: 360px) {
  .title-main  { font-size: 32px; }
  .giftbox     { width: 200px; height: 200px; }
  .hand-circle { width: 120px; height: 120px; }
  .prize-grid  { gap: 10px; width: calc(100% - 24px); }
}

/* ============================================================
   COUNTDOWN OVERLAY
============================================================ */
.countdown-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 30, 80, 0.82);
  transition: opacity 0.25s ease;
}

.countdown-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.countdown-number {
  font-size: clamp(120px, 30vw, 200px);
  font-weight: 900;
  color: var(--white);
  line-height: 1;
  text-shadow: 0 6px 32px rgba(0,0,0,0.5);
  animation: countPop 0.4s cubic-bezier(.4,0,.2,1) both;
}

@keyframes countPop {
  0%   { transform: scale(1.8); opacity: 0; }
  60%  { transform: scale(0.9); }
  100% { transform: scale(1);   opacity: 1; }
}