:root {
  --bg: #0d1b2a;
  --bg-soft: #1b263b;
  --card: #27374d;
  --accent: #f4d35e;
  --accent-2: #ee964b;
  --text: #f7f9fb;
  --muted: #c5d1dd;
  --ok: #59cd90;
  --danger: #ff6b6b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  background: radial-gradient(circle at 20% 20%, #1b263b 0%, #0d1b2a 45%, #09121d 100%);
  color: var(--text);
  min-height: 100vh;
}

.container {
  width: min(1100px, 92vw);
  margin: 2rem auto;
}

.grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 1rem;
}

.card {
  background: linear-gradient(160deg, rgba(39, 55, 77, 0.9), rgba(22, 32, 48, 0.9));
  border: 1px solid rgba(244, 211, 94, 0.25);
  border-radius: 14px;
  padding: 1rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

h1, h2, h3 {
  margin-top: 0;
}

input, button {
  width: 100%;
  border: 0;
  border-radius: 10px;
  padding: 0.75rem;
  margin-bottom: 0.6rem;
}

input {
  background: #fff;
}

button {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #222;
  font-weight: 700;
  cursor: pointer;
}

button.secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.4);
}

button.danger {
  background: var(--danger);
  color: #fff;
}

.options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.option {
  padding: 0.8rem;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  text-align: left;
}

.option:hover {
  border-color: var(--accent);
}

.small {
  color: var(--muted);
  font-size: 0.9rem;
}

.msg-ok {
  color: var(--ok);
}

.msg-err {
  color: var(--danger);
}

.leader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.4s ease, background 0.4s ease;
  position: relative;
}

.leader.rank-1 {
  background: linear-gradient(90deg, rgba(255, 215, 0, 0.15), transparent);
  border-left: 3px solid gold;
}
.leader.rank-2 {
  background: linear-gradient(90deg, rgba(192, 192, 192, 0.1), transparent);
  border-left: 3px solid silver;
}
.leader.rank-3 {
  background: linear-gradient(90deg, rgba(205, 127, 50, 0.1), transparent);
  border-left: 3px solid #cd7f32;
}

.leader .rank-badge {
  font-weight: bold;
  font-size: 1.1rem;
  min-width: 28px;
  text-align: center;
  margin-right: 0.5rem;
}
.leader.rank-1 .rank-badge { color: gold; }
.leader.rank-2 .rank-badge { color: silver; }
.leader.rank-3 .rank-badge { color: #cd7f32; }

.leader .move-indicator {
  font-size: 0.75rem;
  margin-left: 0.4rem;
  font-weight: bold;
  animation: moveFlash 1.5s ease-out forwards;
}
.move-up { color: var(--ok); }
.move-down { color: var(--danger); }

@keyframes moveFlash {
  0% { opacity: 1; transform: translateY(0); }
  60% { opacity: 1; }
  100% { opacity: 0; transform: translateY(-8px); }
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(-20px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes shameAppear {
  from { opacity: 0; transform: scale(0.5) rotate(-10deg); }
  to { opacity: 1; transform: scale(1) rotate(0deg); }
}

.leader.entering {
  animation: slideIn 0.5s ease-out forwards;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  object-fit: cover;
  margin-right: 0.6rem;
  border: 2px solid rgba(255,255,255,0.2);
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.leader.rank-1 .avatar { border-color: gold; }
.leader.rank-2 .avatar { border-color: silver; }
.leader.rank-3 .avatar { border-color: #cd7f32; }

.avatar-placeholder {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  margin-right: 0.6rem;
  background: var(--bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  border: 2px solid rgba(255,255,255,0.15);
}

.leader-score {
  font-weight: bold;
  font-size: 1rem;
  color: var(--accent);
}

.leader-name {
  font-size: 0.95rem;
}

.row {
  display: flex;
  align-items: center;
}

@media (max-width: 900px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .container {
    width: 96vw;
    margin: 0.6rem auto;
  }

  .topbar {
    padding: 0.8rem;
    gap: 0.5rem;
    flex-wrap: wrap;
  }

  .topbar h1 {
    width: 100%;
    font-size: 2rem;
    line-height: 1.1;
  }

  #userBox {
    font-size: 1rem;
  }

  .card {
    padding: 0.85rem;
    border-radius: 12px;
  }

  #gameStatus {
    font-size: 2rem;
    line-height: 1.15;
  }

  #questionText {
    font-size: 1.7rem;
    line-height: 1.25;
    margin-top: 0.35rem;
  }

  .small {
    font-size: 1.05rem;
    line-height: 1.35;
  }

  .option {
    min-height: 64px;
    font-size: 1.05rem;
  }

  .flappy-panel .btn-start {
    font-size: 1.15rem;
    padding: 0.95rem;
  }

  .flappy-canvas {
    border-radius: 14px !important;
  }
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(160deg, rgba(39, 55, 77, 0.9), rgba(22, 32, 48, 0.9));
  border: 1px solid rgba(244, 211, 94, 0.25);
  border-radius: 14px;
  padding: 1rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.topbar h1 {
  margin: 0;
  flex-grow: 1;
}

.topbar #userBox {
  margin: 0 1rem;
}

.btn-logout {
  background: var(--danger) !important;
  color: #fff !important;
  padding: 0.6rem 1rem !important;
  width: auto !important;
  margin: 0 !important;
}

.btn-logout:hover {
  opacity: 0.9;
}

#adminControls {
  display: flex;
  gap: 0.5rem;
}

.btn-start, .btn-next {
  background: linear-gradient(90deg, #4CAF50, #66BB6A) !important;
  color: #fff !important;
  padding: 0.6rem 1rem !important;
  width: auto !important;
  margin: 0 !important;
  font-weight: 600;
}

.btn-start:hover, .btn-next:hover {
  opacity: 0.9;
}

.btn-start:disabled, .btn-next:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

h3 {
  font-size: 1.1rem;
  margin-top: 1.2rem;
  margin-bottom: 0.6rem;
  color: var(--accent);
}

label {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 0.9rem;
  color: var(--muted);
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="file"] {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  padding: 0.75rem;
  margin-bottom: 0.6rem;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="file"]:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.08);
}

.deleteQuestionBtn:hover {
  opacity: 0.85;
}

/* ---- Phone preview in admin ---- */
.preview-phone {
  background: #111;
  border-radius: 32px;
  padding: 12px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.5), inset 0 0 0 2px rgba(255,255,255,0.08);
  max-width: 340px;
  margin: 0 auto;
  position: relative;
}

.preview-phone-notch {
  width: 100px;
  height: 6px;
  background: #222;
  border-radius: 4px;
  margin: 0 auto 8px;
}

.preview-phone-screen {
  background: radial-gradient(circle at 20% 20%, #1b263b 0%, #0d1b2a 45%, #09121d 100%);
  border-radius: 20px;
  min-height: 480px;
  max-height: 600px;
  overflow-y: auto;
  padding: 0.8rem;
}

.preview-content h3.pv-question {
  color: var(--accent);
  font-size: 1rem;
  margin: 0 0 0.6rem;
  line-height: 1.3;
}

.preview-content .pv-media {
  max-width: 100%;
  border-radius: 10px;
  margin-bottom: 0.5rem;
}

.preview-content .pv-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
}

.preview-content .pv-option {
  padding: 0.55rem;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  font-size: 0.8rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
}

.preview-content .pv-option.pv-correct {
  border-color: var(--ok);
  background: rgba(89,205,144,0.12);
}

.preview-content .pv-option img {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: 6px;
}

.preview-content .pv-ranking-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  font-size: 0.8rem;
  margin-bottom: 0.35rem;
}

.preview-content .pv-ranking-item img {
  width: 40px;
  height: 40px;
  object-fit: cover;
  border-radius: 6px;
}

.preview-content .pv-ranking-item .pv-rank-num {
  font-weight: bold;
  color: var(--accent);
  min-width: 20px;
}

.preview-content .pv-flappy-zone {
  background: linear-gradient(180deg, #57b1ff 0%, #163c66 100%);
  border-radius: 12px;
  height: 200px;
  position: relative;
  overflow: hidden;
  margin-bottom: 0.5rem;
  border: 1px solid rgba(255,255,255,0.2);
}

.preview-content .pv-flappy-bird {
  position: absolute;
  left: 50px;
  top: 70px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #ffd54f;
  border: 2px solid #222;
  object-fit: cover;
}

.preview-content .pv-flappy-obstacle {
  position: absolute;
  width: 50px;
  background: rgba(255, 80, 80, 0.85);
  border: 1px solid rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.preview-content .pv-flappy-obstacle img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.preview-content .pv-timer {
  text-align: center;
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.5rem;
}

.preview-content .pv-flappy-label {
  text-align: center;
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

@media (max-width: 900px) {
  #formColumn, #previewColumn {
    grid-column: 1 / -1;
  }
}