:root {
  --bg: #0d1117;
  --bg-card: #161b22;
  --bg-raised: #1c2129;
  --border: #2a2f38;
  --border-soft: rgba(255, 255, 255, 0.06);
  --text: #e6edf3;
  --text-dim: #9198a1;
  --text-faint: #6e7681;
  --accent: #2f81f7;
  --accent-soft-bg: rgba(47, 129, 247, 0.12);
  --accent-soft-border: rgba(47, 129, 247, 0.35);

  --accent-purple: #a371f7;
  --accent-purple-soft-bg: rgba(163, 113, 247, 0.14);
  --accent-purple-soft-border: rgba(163, 113, 247, 0.4);

  --accent-amber: #e3b341;
  --accent-amber-soft-bg: rgba(227, 179, 65, 0.14);
  --accent-amber-soft-border: rgba(227, 179, 65, 0.4);

  --accent-teal: #39c5cf;

  --accent-green: #3fb950;
  --accent-green-soft-bg: rgba(63, 185, 80, 0.14);
  --accent-green-soft-border: rgba(63, 185, 80, 0.4);

  --overlay-soft: rgba(255, 255, 255, 0.04);
  --overlay-strong: rgba(255, 255, 255, 0.08);
  --card-bg: rgba(22, 27, 34, 0.6);
  --card-bg-strong: rgba(22, 27, 34, 0.85);
}

/* Chế độ sáng - đổi lại đúng các biến màu gốc, mọi component dùng var(--...)
   tự đổi theo mà không cần sửa từng chỗ. Vài hiệu ứng glow/blur viết tay bằng
   rgba() cố định (không qua biến) vẫn tối như cũ - để tinh chỉnh dần sau. */
:root[data-theme="light"] {
  --bg: #f4f6f9;
  --bg-card: #ffffff;
  --bg-raised: #eef1f6;
  --border: #d7dce3;
  --border-soft: rgba(0, 0, 0, 0.06);
  --text: #1b2129;
  --text-dim: #4c5563;
  --text-faint: #6b7280;

  --overlay-soft: rgba(0, 0, 0, 0.03);
  --overlay-strong: rgba(0, 0, 0, 0.06);
  --card-bg: rgba(255, 255, 255, 0.75);
  --card-bg-strong: rgba(255, 255, 255, 0.9);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: var(--bg);
  color: var(--text);
  min-height: 100vh;
  background-attachment: fixed;
  overflow-x: hidden;
  position: relative;
}

/* Light mode = bầu trời buổi sáng (xanh nhạt -> hồng cam nhẹ ở chân trời) -
   tương phản với dark mode (bầu trời đêm, nền tối trơn) - mây trong
   particles.js vẽ màu trắng nên cần nền có sắc để nổi lên, không bị chìm. */
:root[data-theme="light"] body {
  background: linear-gradient(180deg, #bfe0ff 0%, #d9ecff 30%, #f2e9dd 68%, #fbe4cf 100%);
}

/* Dải sao trôi nhẹ, nằm dưới cùng, không ảnh hưởng tương tác */
#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

.app-container {
  position: relative;
  z-index: 1;
}

.navbar {
  display: flex;
  flex-direction: column;
  padding: 22px 40px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  width: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}

.logo-placeholder {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--bg-card);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand-text {
  display: flex;
  flex-direction: row;
  align-items: baseline;
  gap: 18px;
  flex-wrap: wrap;
}

.brand-title {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.5px;
  color: var(--text);
}

.brand-notice {
  font-size: 0.72rem;
  color: var(--text-faint);
  line-height: 1.3;
  padding-left: 18px;
  border-left: 1px solid var(--border);
}

.sub-title {
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--text-faint);
  margin-left: 8px;
}

/* Tính năng "key" (giới hạn dùng AI) - pill hiển thị số key + nút "+" (chưa
   có chức năng, sẽ dẫn tới trang thanh toán sau) ở góc trên-phải header. */
.header-key-area {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: auto;
  flex-shrink: 0;
}

.key-balance-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 6px 6px 20px;
}

.key-balance-value {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.5px;
  color: var(--text);
  min-width: 42px;
  text-align: right;
}

.key-balance-icon {
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.key-balance-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.key-topup-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-dim);
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.key-topup-btn:hover {
  color: var(--text);
  border-color: var(--accent);
  background: var(--bg);
}

/* ==== Key Shop (modal mở từ nút "+") - hiện chỉ là giao diện tĩnh, chưa nối
   cổng thanh toán thật (xem initKeyShopWidget() ở main.js). ==== */
.key-shop-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(4, 6, 10, 0.88);
}

.key-shop-overlay.open {
  display: flex;
}

.key-shop-panel {
  width: min(560px, 100%);
  max-height: min(720px, 100%);
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: 12px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.key-shop-header {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.key-shop-title {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
}

.key-shop-close {
  background: none;
  border: none;
  color: var(--text-faint);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  padding: 6px 9px;
  border-radius: 6px;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.key-shop-close:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.key-shop-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

.key-shop-notice {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin: 0 0 16px;
}

.key-shop-packages {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.key-shop-package {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
}

.key-shop-package-amount {
  flex-shrink: 0;
  background: var(--bg-card);
  border: 1px solid var(--accent-soft-border, var(--border));
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: 999px;
  padding: 6px 14px;
}

.key-shop-package-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.key-shop-package-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.key-shop-package-price {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-left: auto;
}

.key-shop-pay-btn {
  flex-shrink: 0;
  background: var(--accent-soft-bg, var(--bg-card));
  border: 1px solid var(--accent-soft-border, var(--border));
  color: var(--accent);
  font-weight: 600;
  font-size: 0.82rem;
  border-radius: 8px;
  padding: 8px 16px;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.key-shop-pay-btn:hover {
  background: var(--accent);
  color: #fff;
}

.key-shop-purchase-count {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--text-dim);
}

.key-shop-purchase-count-value {
  font-weight: 700;
  color: var(--text);
}

/* View "đang chờ thanh toán" (QR) - thay thế view danh sách gói, xem
   initKeyShopWidget() ở js/core/main.js */
.key-shop-qr-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 16px;
}

.key-shop-qr-img {
  width: 220px;
  height: 220px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  object-fit: contain;
}

.key-shop-qr-fallback {
  width: 220px;
  border-radius: 10px;
  border: 1px dashed var(--border);
  padding: 16px;
  font-size: 0.8rem;
  color: var(--text-dim);
  line-height: 1.6;
  text-align: left;
}

.key-shop-payment-info {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
}

.key-shop-payment-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.key-shop-payment-row span:last-child {
  font-weight: 700;
  color: var(--text);
  font-family: monospace;
}

.key-shop-payment-timer {
  color: #f87171 !important;
}

.key-shop-payment-hint {
  font-size: 0.75rem;
  color: var(--text-faint);
  text-align: center;
  margin-bottom: 10px;
  line-height: 1.4;
}

.key-shop-payment-status {
  text-align: center;
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 16px;
}

.key-shop-cancel-btn {
  display: block;
  width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-weight: 600;
  font-size: 0.85rem;
  border-radius: 8px;
  padding: 10px;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.key-shop-cancel-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.nav-links {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
}

.nav-btn {
  flex: 1;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease,
    color 0.15s ease, transform 0.12s ease, box-shadow 0.15s ease;
}

.nav-btn .title {
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.nav-btn:hover {
  color: var(--text);
  border-color: var(--border);
  background: var(--bg-card);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
}

.nav-btn:active {
  transform: translateY(0) scale(0.97);
  box-shadow: none;
}

.nav-btn.active {
  color: var(--text);
  border-color: var(--accent-soft-border);
  background: var(--accent-soft-bg);
  box-shadow: inset 0 -2px 0 var(--accent);
}

/* Home Dashboard Styling */
.content-area {
  padding: 30px 40px;
}

.home-dashboard {
  display: grid;
  grid-template-columns: 1fr 1.3fr 1.2fr;
  gap: 20px;
  max-width: 1400px;
  margin: 0 auto;
  align-items: start;
}

.left-column, .middle-column, .right-column {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.ai-disclaimer {
  grid-column: 1 / -1;
  justify-self: center;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--overlay-soft);
  color: var(--text-dim);
  font-size: 0.82rem;
  line-height: 1.4;
  max-width: 100%;
}

.ai-disclaimer svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--accent-amber);
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-top: 3px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  backdrop-filter: blur(9px);
  -webkit-backdrop-filter: blur(9px);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.4);
}

.mascot-card {
  border-top-color: var(--accent);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  min-height: 420px;
}

.mascot-speech-bubble {
  position: relative;
  margin-top: 14px;
  padding: 12px 16px;
  border-radius: 12px;
  background: var(--overlay-soft);
  border: 1px solid var(--border-soft);
}

.mascot-speech-bubble::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 12px;
  height: 12px;
  background: var(--overlay-soft);
  border-left: 1px solid var(--border-soft);
  border-top: 1px solid var(--border-soft);
}

.mascot-speech-bubble p {
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.5;
  margin: 0;
}
.quote-card { border-top-color: var(--accent-purple); }
.tip-card { border-top-color: var(--accent-amber); }
.welcome-card { border-top-color: var(--accent-teal); }
.dev-card { border-top-color: var(--accent-green); }

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.card-title {
  font-weight: 700;
  letter-spacing: 0.5px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.badge {
  font-size: 0.7rem;
  background: var(--overlay-soft);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 3px 8px;
  border-radius: 5px;
}

.sub-text {
  font-size: 0.72rem;
  color: var(--text-faint);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.mascot-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px 0 2px;
  min-height: 130px;
}

.mascot-robot {
  width: 100%;
  max-width: 190px;
  height: auto;
  animation: mascot-float 3.4s ease-in-out infinite;
}

.mascot-shell {
  fill: var(--bg-raised);
  stroke: var(--border);
  stroke-width: 2;
}

.mascot-antenna {
  stroke: var(--border);
  stroke-width: 2.5;
  stroke-linecap: round;
}

.mascot-mouth {
  fill: none;
  stroke: var(--border);
  stroke-width: 2.5;
  stroke-linecap: round;
}

.mascot-antenna-dot {
  fill: var(--accent);
  filter: drop-shadow(0 0 3px var(--accent));
  animation: mascot-pulse 2.2s ease-in-out infinite;
}

.mascot-eye {
  fill: var(--accent);
  transform-origin: center;
  animation: mascot-blink 4.5s ease-in-out infinite;
}

.mascot-arm {
  fill: none;
  stroke: var(--border);
  stroke-width: 13;
  stroke-linecap: round;
}

.mascot-arm-fill {
  fill: none;
  stroke: var(--bg-raised);
  stroke-width: 9;
  stroke-linecap: round;
}

.mascot-finger {
  stroke: var(--border);
  stroke-width: 2.5;
  stroke-linecap: round;
}

.mascot-wave {
  transform-box: fill-box;
  transform-origin: 0% 100%;
  animation: mascot-wave-swing 1.6s ease-in-out infinite;
}

.mascot-cape {
  fill: var(--accent);
  opacity: 0.55;
}

.mascot-cap-top {
  fill: #1c2129;
  stroke: var(--border);
  stroke-width: 1.5;
  stroke-linejoin: round;
}

.mascot-cap-band {
  fill: #1c2129;
  stroke: var(--border);
  stroke-width: 1.5;
}

.mascot-cap-string {
  stroke: var(--accent-amber);
  stroke-width: 2;
  stroke-linecap: round;
}

.mascot-cap-tassel {
  fill: var(--accent-amber);
}

.mascot-eye-wink {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2.5;
  stroke-linecap: round;
}

@keyframes mascot-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

@keyframes mascot-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

@keyframes mascot-blink {
  0%, 92%, 100% { transform: scaleY(1); }
  96% { transform: scaleY(0.15); }
}

@keyframes mascot-wave-swing {
  0%, 100% { transform: rotate(-6deg); }
  50% { transform: rotate(16deg); }
}

.quote-content, .tip-content {
  font-size: 1rem;
  font-style: normal;
  line-height: 1.55;
  color: var(--text);
  margin-bottom: 18px;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-faint);
  border-top: 1px solid var(--border-soft);
  padding-top: 12px;
}

.welcome-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

.welcome-avatar-wrap {
  position: relative;
  flex-shrink: 0;
}

.welcome-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
  background: var(--bg-card);
  display: block;
}

.welcome-text {
  min-width: 0;
}

.welcome-subtitle {
  font-size: 0.75rem;
  letter-spacing: 1px;
  color: var(--text-faint);
}

.welcome-title {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--text);
  margin-top: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

#user-name-display {
  outline: none;
  border-bottom: 1px dashed transparent;
  cursor: text;
  transition: border-color 0.2s ease;
}

#user-name-display:hover,
#user-name-display:focus {
  border-bottom: 1px dashed var(--text-faint);
}

.edit-name-btn {
  background: none;
  border: none;
  border-radius: 6px;
  padding: 5px;
  line-height: 1;
  cursor: pointer;
  color: var(--text-faint);
  display: inline-flex;
  align-items: center;
  transition: color 0.2s ease, background-color 0.2s ease, transform 0.12s ease;
}

.edit-name-btn:hover {
  color: var(--text-dim);
  background: var(--overlay-strong);
}

.edit-name-btn:active {
  transform: scale(0.88);
}

.edit-name-btn svg {
  width: 15px;
  height: 15px;
}

.quote-card .badge {
  background: var(--accent-purple-soft-bg);
  border-color: var(--accent-purple-soft-border);
  color: var(--accent-purple);
}

.tip-card .badge {
  background: var(--accent-amber-soft-bg);
  border-color: var(--accent-amber-soft-border);
  color: var(--accent-amber);
}

.founder-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 18px;
}

.founder-member {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  min-width: 0;
}

.founder-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 2px solid var(--accent-green-soft-border);
  object-fit: cover;
  background: var(--bg-card);
  margin-bottom: 8px;
}

.founder-role {
  font-size: 0.68rem;
  color: var(--text-faint);
  letter-spacing: 0.3px;
}

.founder-name {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

.dev-divider {
  height: 1px;
  background: var(--border-soft);
  margin-bottom: 16px;
}

.dev-quote {
  font-size: 0.8rem;
  color: var(--text-dim);
  line-height: 1.5;
  border-left: none;
  padding: 0;
}

.dev-quote footer {
  margin-top: 8px;
  font-size: 0.7rem;
  color: var(--text-faint);
}

.motto {
  color: var(--text-dim);
  margin-left: 5px;
}

.placeholder-page {
  text-align: center;
  padding: 100px 0;
  color: var(--text-faint);
}

/* ==== Trang Analysis ==== */

.analysis-heading {
  font-size: 2rem;
  font-weight: 800;
  text-align: center;
  margin: 8px auto 28px;
  max-width: 1300px;
}

.analysis-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 1300px;
  margin: 0 auto;
  align-items: start;
}

#analysis-box-1 {
  grid-column: 1 / -1;
  border-top-color: var(--accent);
}

.analysis-box-body {
  max-height: 440px;
  overflow-y: auto;
}

.analysis-score-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.analysis-score-label {
  width: 110px;
  flex: none;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.analysis-score-bar {
  flex: 1;
  height: 10px;
  background: var(--overlay-strong);
  border-radius: 6px;
  overflow: hidden;
}

.analysis-score-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 6px;
  transition: width 0.4s ease;
}

.analysis-score-value {
  width: 40px;
  flex: none;
  text-align: right;
  font-weight: 700;
  font-size: 0.9rem;
}

.analysis-illusion-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-weight: 600;
  font-size: 0.9rem;
}

.analysis-status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  flex: none;
}

.analysis-status-dot--red {
  background: #f87171;
  box-shadow: 0 0 8px rgba(248, 113, 113, 0.6);
}

.analysis-status-dot--green {
  background: #34d399;
  box-shadow: 0 0 8px rgba(52, 211, 153, 0.6);
}

.analysis-illusion-hint {
  color: var(--text-faint);
  font-size: 0.75rem;
  font-weight: 400;
  margin-left: auto;
}

.analysis-pattern-item,
.analysis-tip-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.analysis-pattern-item:last-child,
.analysis-tip-item:last-child {
  border-bottom: none;
}

.analysis-pattern-title,
.analysis-tip-word {
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.analysis-encouragement {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text);
  font-style: italic;
}

.analysis-empty {
  color: var(--text-faint);
  font-size: 0.85rem;
  padding: 12px 0;
}

@media (max-width: 900px) {
  .analysis-grid {
    grid-template-columns: 1fr;
  }
  #analysis-box-1 {
    grid-column: auto;
  }
}

.feedback-fab {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 50;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4), 0 0 0 4px var(--accent-soft-bg);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.feedback-fab svg {
  width: 22px;
  height: 22px;
}

.feedback-fab:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.45), 0 0 0 5px var(--accent-soft-bg);
}

.feedback-fab:active {
  transform: translateY(0) scale(0.94);
}

.feedback-panel {
  display: none;
  flex-direction: column;
  position: fixed;
  right: 24px;
  bottom: 88px;
  width: min(320px, calc(100vw - 48px));
  background: var(--card-bg-strong);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: 10px;
  padding: 16px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
  z-index: 49;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.feedback-panel.open {
  display: flex;
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.feedback-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.feedback-panel-title {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text);
}

.feedback-close-btn {
  background: none;
  border: none;
  color: var(--text-faint);
  font-size: 0.9rem;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.feedback-close-btn:hover {
  color: var(--text);
  background: var(--overlay-strong);
}

.feedback-desc {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 14px;
}

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

.feedback-input,
.feedback-textarea {
  background: var(--overlay-soft);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 0.85rem;
  font-family: inherit;
  resize: vertical;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.feedback-input::placeholder,
.feedback-textarea::placeholder {
  color: var(--text-faint);
}

.feedback-input:focus,
.feedback-textarea:focus {
  outline: none;
  border-color: var(--accent-soft-border);
  background: var(--overlay-strong);
}

.feedback-submit-btn {
  align-self: flex-start;
  background: var(--accent-soft-bg);
  border: 1px solid var(--accent-soft-border);
  color: var(--accent);
  padding: 9px 18px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease,
    transform 0.12s ease, box-shadow 0.15s ease;
}

.feedback-submit-btn:hover {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
}

.feedback-submit-btn:active {
  transform: scale(0.97);
}

.feedback-status {
  margin-top: 8px;
  font-size: 0.78rem;
  text-align: center;
}

.feedback-status.success {
  color: var(--accent-green, #3fb950);
}

.feedback-status.error {
  color: #e5534b;
}

/* ==== Course / Vocabulary Journey ==== */

.course-page {
  max-width: 1400px;
  margin: 0 auto;
}

.course-header {
  text-align: center;
  margin-bottom: 28px;
}

.course-title {
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--text);
}

.course-title-accent {
  color: var(--accent);
}

.course-subtitle {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 8px;
}

.course-hint {
  color: var(--text-faint);
}

.world-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.world-card {
  border-radius: 10px;
  border: 1px solid var(--border);
  border-top: 3px solid var(--world-accent, var(--border));
  background: var(--bg-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.world-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.45);
}

.world-card[data-accent="green"] {
  --world-accent: var(--accent-green);
  --world-accent-soft-bg: var(--accent-green-soft-bg);
  --world-accent-soft-border: var(--accent-green-soft-border);
}

.world-card[data-accent="blue"] {
  --world-accent: var(--accent);
  --world-accent-soft-bg: var(--accent-soft-bg);
  --world-accent-soft-border: var(--accent-soft-border);
}

.world-art {
  position: relative;
  height: 230px;
  background-size: cover;
  background-position: center;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.world-art::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(13, 17, 23, 0) 35%, rgba(13, 17, 23, 0.95) 100%);
}

.world-art-top {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 14px;
}

.world-badge-pill,
.world-levels-pill {
  background: rgba(13, 17, 23, 0.65);
  border: 1px solid var(--border-soft);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.68rem;
  backdrop-filter: blur(4px);
}

.world-badge-pill {
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--world-accent, var(--text));
}

.world-levels-pill {
  color: var(--text-dim);
}

.world-art-info {
  position: relative;
  z-index: 1;
  padding: 0 16px 16px;
}

.world-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
}

.world-subtitle-text {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--world-accent, var(--text-dim));
  margin-top: 2px;
}

.world-panel {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.world-progress-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  letter-spacing: 0.5px;
  color: var(--text-faint);
}

.world-progress-level {
  color: var(--text);
  font-weight: 700;
}

.world-progress-bar {
  height: 6px;
  background: var(--overlay-strong);
  border-radius: 4px;
  overflow: hidden;
}

.world-progress-fill {
  height: 100%;
  background: var(--world-accent, var(--accent));
}

.world-progress-footer {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-faint);
}

.world-actions {
  display: flex;
  gap: 10px;
  margin-top: 4px;
}

.world-continue-btn,
.world-replay-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 14px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.82rem;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease,
    border-color 0.15s ease, transform 0.12s ease, box-shadow 0.15s ease;
}

.world-continue-btn svg,
.world-replay-btn svg {
  width: 14px;
  height: 14px;
}

.world-continue-btn {
  background: var(--world-accent-soft-bg, var(--accent-soft-bg));
  border: 1px solid var(--world-accent-soft-border, var(--accent-soft-border));
  color: var(--world-accent, var(--accent));
}

.world-continue-btn:hover {
  background: var(--world-accent, var(--accent));
  color: #fff;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
}

.world-replay-btn {
  background: var(--overlay-soft);
  border: 1px solid var(--border);
  color: var(--text-dim);
}

.world-replay-btn:hover {
  background: var(--overlay-strong);
  color: var(--text);
  border-color: var(--text-faint);
}

.world-continue-btn:active,
.world-replay-btn:active {
  transform: scale(0.96);
}

/* ==== Trang Profile (đăng nhập Google) ==== */

.profile-page {
  padding-top: 60px;
  text-align: center;
}

.profile-desc {
  color: var(--text-dim);
  max-width: 560px;
  margin: 0 auto 28px;
  line-height: 1.6;
}

.profile-single-card {
  max-width: 560px;
  margin: 0 auto;
  text-align: left;
  border-top-color: var(--accent);
}

.profile-section-divider {
  height: 1px;
  background: var(--border-soft);
  margin: 20px 0;
}

#google-signin-btn {
  display: flex;
  justify-content: center;
}

.profile-signin-btn-area {
  margin-top: 14px;
}

.profile-logged-in {
  display: flex;
  align-items: center;
  gap: 14px;
}

.profile-logged-out {
  margin-bottom: 4px;
}

.profile-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 2px solid var(--accent-soft-border);
  flex-shrink: 0;
  object-fit: cover;
  background: var(--bg-card);
}

.profile-info {
  flex: 1;
  min-width: 0;
}

.profile-name {
  font-weight: 700;
  color: var(--text);
}

.profile-email {
  font-size: 0.8rem;
  color: var(--text-faint);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.profile-playtime-row {
  margin-top: 14px;
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--overlay-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.profile-playtime-value {
  font-weight: 700;
  color: var(--accent);
  font-size: 0.95rem;
}

.profile-stat-list {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.profile-stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.88rem;
  color: var(--text-dim);
}

.profile-stat-value {
  font-weight: 600;
  color: var(--text);
}

.profile-stat-value.linked {
  color: var(--accent-green);
}

.profile-stat-value.unlinked {
  color: var(--text-faint);
}

.profile-bio-block {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-soft);
}

.profile-bio-textarea {
  width: 100%;
  margin-top: 8px;
  padding: 10px 12px;
  min-height: 80px;
  resize: vertical;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-raised);
  color: var(--text);
  font-family: inherit;
  font-size: 0.85rem;
  line-height: 1.5;
}

.profile-bio-textarea:focus {
  outline: none;
  border-color: var(--accent-soft-border);
}

.profile-bio-textarea::placeholder {
  color: var(--text-faint);
}

.profile-bio-counter {
  margin-top: 6px;
  text-align: right;
  font-size: 0.72rem;
  color: var(--text-faint);
}

.profile-setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-soft);
}

.profile-setting-row:first-of-type {
  padding-top: 0;
}

.profile-setting-label {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.profile-setting-label span:first-child {
  font-size: 0.9rem;
  color: var(--text);
  font-weight: 600;
}

.profile-setting-hint {
  font-size: 0.78rem;
  color: var(--text-faint);
}

.profile-toggle-btn {
  min-width: 84px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.profile-toggle-btn.is-on {
  background: var(--accent-soft-bg);
  border-color: var(--accent-soft-border);
  color: var(--accent);
}

.profile-toggle-btn:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.profile-setting-sub {
  padding: 10px 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.profile-setting-sub label {
  font-size: 0.82rem;
  color: var(--text-dim);
}

.profile-setting-sub input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.profile-setting-sub select {
  width: 100%;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-raised);
  color: var(--text-dim);
}

.profile-setting-sub select:disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

.profile-inline-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.profile-inline-row select {
  flex: 1;
}

.profile-preview-btn {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-raised);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.8rem;
  transition: background 0.15s ease, color 0.15s ease;
}

.profile-preview-btn:hover {
  background: var(--overlay-strong);
  color: var(--text);
}

.profile-danger-zone {
  max-width: 880px;
  margin: 28px auto 0;
  display: flex;
  justify-content: center;
  gap: 12px;
}

.profile-delete-btn {
  padding: 10px 20px;
  border-radius: 8px;
  border: 1px solid rgba(248, 81, 73, 0.4);
  background: rgba(248, 81, 73, 0.1);
  color: #f85149;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
}

.profile-delete-btn:hover {
  background: rgba(248, 81, 73, 0.18);
}

.profile-delete-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

#auth-error-area {
  margin-top: 14px;
}