/**
 * DPS Media Comment - Main Stylesheet
 * Lấy cảm hứng từ hệ thống bình luận báo điện tử hiện đại (VnExpress / Zing News).
 * Thiết kế siêu nhẹ, tinh tế, hỗ trợ CSS Variables & Dark Mode.
 */

:root {
  /* Brand Tokens */
  --dps-primary: #1062b8;
  --dps-primary-hover: #0c4d92;
  --dps-primary-light: #e8f2fc;
  --dps-danger: #e53935;
  --dps-danger-light: #fde8e8;
  --dps-success: #2e7d32;
  --dps-warning: #f57c00;

  /* Neutral Tokens (Light) */
  --dps-bg-main: #ffffff;
  --dps-bg-subtle: #f8f9fa;
  --dps-bg-input: #f0f2f5;
  --dps-bg-hover: #e4e6eb;
  --dps-border: #e0e0e0;
  --dps-border-focus: #1062b8;
  --dps-text-main: #222222;
  --dps-text-muted: #65676b;
  --dps-text-subtle: #8a8d91;

  /* Typography & Layout */
  --dps-font: inherit;
  --dps-font-size-base: 15.5px;
  --dps-line-height-base: 1.6;
  --dps-radius-sm: 4px;
  --dps-radius-md: 8px;
  --dps-radius-lg: 18px;
  --dps-radius-full: 9999px;
  --dps-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
  --dps-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* Dark Mode Tokens */
@media (prefers-color-scheme: dark), [data-theme="dark"] {
  :root {
    --dps-bg-main: #18191a;
    --dps-bg-subtle: #242526;
    --dps-bg-input: #3a3b3c;
    --dps-bg-hover: #4e4f50;
    --dps-border: #393a3b;
    --dps-text-main: #e4e6eb;
    --dps-text-muted: #b0b3b8;
    --dps-text-subtle: #777a80;
    --dps-primary-light: #182838;
  }
}

/* Base Root Container */
.dps-comment-root {
  font-family: var(--dps-font);
  font-size: var(--dps-font-size-base);
  line-height: var(--dps-line-height-base);
  color: var(--dps-text-main);
  background-color: var(--dps-bg-main);
  border-top: 1px solid var(--dps-border);
  padding-top: 24px;
  margin-top: 32px;
  box-sizing: border-box;
}

.dps-comment-root *,
.dps-comment-root *::before,
.dps-comment-root *::after {
  box-sizing: border-box;
}

/* Header & Sort Tabs */
.dps-comment-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.dps-comment-title {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  color: var(--dps-text-main);
  display: flex;
  align-items: center;
  gap: 6px;
}

.dps-comment-count {
  color: var(--dps-text-muted);
  font-weight: 500;
}

.dps-sort-tabs {
  display: inline-flex;
  background-color: var(--dps-bg-subtle);
  padding: 3px;
  border-radius: var(--dps-radius-full);
  border: 1px solid var(--dps-border);
}

.dps-sort-btn {
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  color: var(--dps-text-muted);
  padding: 6px 14px;
  border-radius: var(--dps-radius-full);
  cursor: pointer;
  transition: all 0.2s ease;
}

.dps-sort-btn:hover {
  color: var(--dps-text-main);
}

.dps-sort-btn.active {
  background-color: var(--dps-bg-main);
  color: var(--dps-primary);
  font-weight: 600;
  box-shadow: var(--dps-shadow-sm);
}

/* Main Form Wrapper */
.dps-main-form-wrapper {
  margin-bottom: 24px;
}

.dps-comment-form {
  background-color: var(--dps-bg-subtle);
  border: 1px solid var(--dps-border);
  border-radius: var(--dps-radius-md);
  padding: 14px 16px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.dps-comment-form.dps-form-focused {
  border-color: var(--dps-border-focus);
  background-color: var(--dps-bg-main);
  box-shadow: 0 0 0 3px var(--dps-primary-light);
}

.dps-comment-form.dps-is-reply-form {
  margin-top: 12px;
  background-color: var(--dps-bg-subtle);
}

.dps-form-layout {
  display: flex;
  gap: 12px;
  align-items: center;
}

.dps-comment-form.dps-form-focused .dps-form-layout {
  align-items: flex-start;
}

.dps-form-avatar {
  flex-shrink: 0;
}

.dps-avatar-img {
  width: 38px;
  height: 38px;
  border-radius: var(--dps-radius-full);
  object-fit: cover;
  display: block;
}

.dps-avatar-placeholder {
  width: 38px;
  height: 38px;
  border-radius: var(--dps-radius-full);
  background-color: var(--dps-bg-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dps-text-muted);
}

.dps-form-main {
  flex-grow: 1;
}

.dps-textarea-wrapper {
  position: relative;
}

.dps-textarea {
  width: 100%;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: var(--dps-font-size-base);
  line-height: 1.5;
  color: var(--dps-text-main);
  resize: none;
  outline: none;
  min-height: 38px;
  padding: 6px 0 4px 0;
  display: block;
  box-sizing: border-box;
  transition: min-height 0.2s ease;
}

.dps-comment-form.dps-form-focused .dps-textarea {
  min-height: 72px;
  padding-top: 4px;
}

.dps-textarea::placeholder {
  color: var(--dps-text-subtle);
  opacity: 0.9;
}

/* Form Drawer */
.dps-form-drawer {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--dps-border);
}

/* Trạng thái Guest Mode & Focus */
.dps-comment-form.dps-guest-mode {
  cursor: pointer;
}

.dps-comment-form.dps-guest-mode .dps-textarea {
  cursor: pointer;
}

.dps-comment-form.dps-guest-mode:hover {
  border-color: var(--dps-primary);
}

.dps-logged-user-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--dps-text-muted);
  padding: 4px 0 8px 0;
}

.dps-logged-user-bar strong {
  color: var(--dps-text-main);
  font-weight: 600;
}

/* ==========================================================================
   VnExpress-Style Google Login Modal
   ========================================================================== */
.dps-modal-wrapper {
  position: fixed;
  inset: 0;
  z-index: 999999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.dps-modal-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  animation: dpsFadeIn 0.25s ease-out forwards;
}

.dps-modal-dialog {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 440px;
  background-color: #ffffff;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 1px rgba(0, 0, 0, 0.2);
  padding: 36px 32px 28px;
  text-align: center;
  box-sizing: border-box;
  animation: dpsPopIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.dps-modal-close {
  position: absolute;
  top: 14px;
  right: 16px;
  background: transparent;
  border: none;
  font-size: 28px;
  line-height: 1;
  color: #888888;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 50%;
  transition: all 0.2s ease;
}

.dps-modal-close:hover {
  color: #111111;
  background-color: #f1f3f4;
}

.dps-modal-logo {
  margin-bottom: 12px;
}

.dps-brand-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 1.6px;
  color: #9f224e;
  text-transform: uppercase;
  background-color: #fdf1f4;
  padding: 4px 10px;
  border-radius: 4px;
}

.dps-modal-title {
  font-size: 21px;
  font-weight: 700;
  color: #222222;
  margin: 0 0 8px 0;
  line-height: 1.3;
}

.dps-modal-desc {
  font-size: 13.5px;
  color: #666666;
  line-height: 1.5;
  margin: 0 0 24px 0;
}

.dps-modal-body {
  margin-bottom: 20px;
}

.dps-modal-google-slot {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
}

.dps-btn-google-modal-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  max-width: 320px;
  height: 46px;
  padding: 0 20px;
  background-color: #ffffff;
  color: #3c4043;
  border: 1px solid #dadce0;
  border-radius: 24px;
  font-family: inherit;
  font-size: 14.5px;
  font-weight: 500;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(60,64,67,0.12);
  transition: all 0.2s ease;
}

.dps-btn-google-modal-trigger:hover {
  background-color: #f8f9fa;
  border-color: #d2e3fc;
  box-shadow: 0 2px 6px rgba(60,64,67,0.2);
}

.dps-modal-message {
  margin-top: 12px;
  font-size: 13px;
  padding: 8px 12px;
  border-radius: 6px;
}

.dps-modal-message.info {
  background-color: #e8f0fe;
  color: #1a73e8;
}

.dps-modal-message.error {
  background-color: #fce8e6;
  color: #d93025;
}

.dps-modal-message.success {
  background-color: #e6f4ea;
  color: #137333;
}

.dps-modal-footer {
  border-top: 1px solid #eeeeee;
  padding-top: 16px;
}

.dps-modal-terms {
  font-size: 12px;
  color: #888888;
  line-height: 1.5;
  margin: 0;
}

.dps-modal-terms a {
  color: #1062b8;
  text-decoration: none;
}

.dps-modal-terms a:hover {
  text-decoration: underline;
}

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

@keyframes dpsPopIn {
  from {
    transform: scale(0.92) translateY(10px);
    opacity: 0;
  }
  to {
    transform: scale(1) translateY(0);
    opacity: 1;
  }
}

.dps-turnstile-slot {
  margin-bottom: 10px;
}

/* Actions in Drawer */
.dps-form-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dps-char-count {
  font-size: 12px;
  color: var(--dps-text-subtle);
}

.dps-char-count.dps-char-over {
  color: var(--dps-danger);
  font-weight: 600;
}

.dps-action-buttons {
  display: flex;
  gap: 8px;
}

.dps-btn {
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: var(--dps-radius-full);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.dps-btn-cancel {
  background-color: transparent;
  color: var(--dps-text-muted);
}

.dps-btn-cancel:hover {
  background-color: var(--dps-bg-hover);
  color: var(--dps-text-main);
}

.dps-btn-submit {
  background-color: var(--dps-primary);
  color: #ffffff;
}

.dps-btn-submit:hover {
  background-color: var(--dps-primary-hover);
}

.dps-btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.dps-form-message {
  margin-top: 10px;
  padding: 8px 12px;
  border-radius: var(--dps-radius-sm);
  font-size: 13px;
}

.dps-form-message.success {
  background-color: var(--dps-primary-light);
  color: var(--dps-primary);
  border: 1px solid var(--dps-primary);
}

.dps-form-message.error {
  background-color: var(--dps-danger-light);
  color: var(--dps-danger);
  border: 1px solid var(--dps-danger);
}

/* Comment Stream & Items */
.dps-comments-stream {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.dps-comment-item {
  position: relative;
}

.dps-comment-body {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.dps-comment-avatar {
  flex-shrink: 0;
}

.dps-comment-main {
  flex-grow: 1;
}

.dps-comment-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 8px;
  margin-bottom: 4px;
}

.dps-author-name {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--dps-text-main);
}

/* Badges */
.dps-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: var(--dps-radius-full);
  display: inline-flex;
  align-items: center;
  gap: 3px;
  line-height: 1.2;
}

.dps-badge-author {
  background-color: var(--dps-primary-light);
  color: var(--dps-primary);
}

.dps-badge-admin {
  background-color: #fef3c7;
  color: #92400e;
}

.dps-badge-expert {
  background-color: #ede9fe;
  color: #5b21b6;
}

.dps-badge-pinned {
  background-color: #fffbeb;
  color: #b45309;
  border: 1px solid #fde68a;
}

.dps-comment-time {
  font-size: 12px;
  color: var(--dps-text-subtle);
  margin-left: 2px;
}

.dps-comment-text {
  font-size: var(--dps-font-size-base);
  color: var(--dps-text-main);
  word-break: break-word;
  margin-bottom: 6px;
}

.dps-comment-text p {
  margin: 0 0 6px 0;
}

.dps-comment-text p:last-child {
  margin-bottom: 0;
}

.dps-comment-text a {
  color: var(--dps-primary);
  text-decoration: underline;
}

/* Actions Bar */
.dps-comment-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.dps-action-btn {
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  color: var(--dps-text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 6px;
  border-radius: var(--dps-radius-sm);
  transition: all 0.15s ease;
}

.dps-action-btn:hover {
  background-color: var(--dps-bg-hover);
  color: var(--dps-text-main);
}

.dps-btn-like.active {
  color: var(--dps-danger);
}

.dps-btn-like.active svg {
  fill: var(--dps-danger);
  animation: dps-like-bounce 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes dps-like-bounce {
  0% { transform: scale(1); }
  50% { transform: scale(1.35); }
  100% { transform: scale(1); }
}

/* Replies & Nested Threads (VnExpress Tree Lines & Reddit Collapse) */
.dps-replies-container {
  position: relative;
  margin-left: 50px;
  padding-left: 14px;
  margin-top: 10px;
}

/* Vạch kẻ chỉ thị luồng (Thread Guide Line) - có thể click để thu gọn */
.dps-thread-line {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--dps-border);
  cursor: pointer;
  transition: all 0.2s ease;
  border-radius: 2px;
}

.dps-thread-line:hover {
  width: 4px;
  background-color: var(--dps-primary);
}

.dps-thread-collapsed .dps-replies-list,
.dps-thread-collapsed .dps-btn-view-replies {
  display: none !important;
}

.dps-thread-expand-btn {
  background: var(--dps-bg-subtle);
  border: 1px solid var(--dps-border);
  color: var(--dps-primary);
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 600;
  border-radius: var(--dps-radius-full);
  padding: 4px 12px;
  cursor: pointer;
  align-items: center;
  gap: 6px;
  margin: 6px 0;
  transition: all 0.15s ease;
}

.dps-thread-expand-btn:hover {
  background: var(--dps-primary-light);
  border-color: var(--dps-primary);
}

.dps-replies-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 8px;
}

.dps-btn-view-replies {
  background: transparent;
  border: none;
  color: var(--dps-primary);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  padding: 6px 0;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.dps-btn-view-replies:hover {
  text-decoration: underline;
}

/* Floating Toast Notification */
.dps-toast-notice {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #1e293b;
  color: #ffffff;
  padding: 10px 18px;
  border-radius: 24px;
  font-size: 13.5px;
  font-weight: 500;
  box-shadow: 0 8px 24px rgba(0,0,0,0.18);
  z-index: 999999;
  opacity: 0;
  transform: translateY(16px);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.dps-toast-notice.show {
  opacity: 1;
  transform: translateY(0);
}

/* Load More Button */
.dps-load-more-wrapper {
  margin-top: 24px;
  text-align: center;
}

.dps-btn-load-more {
  background-color: var(--dps-bg-subtle);
  border: 1px solid var(--dps-border);
  color: var(--dps-text-main);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: var(--dps-radius-full);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.dps-btn-load-more:hover {
  background-color: var(--dps-bg-hover);
}

/* Spinners */
.dps-btn-spinner {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: dps-spin 0.6s linear infinite;
  display: inline-block;
}

.dps-btn-load-more .dps-btn-spinner {
  border-color: rgba(0, 0, 0, 0.2);
  border-top-color: var(--dps-text-main);
}

@keyframes dps-spin {
  to { transform: rotate(360deg); }
}

/* Empty Notice */
.dps-empty-notice {
  text-align: center;
  padding: 36px 16px;
  color: var(--dps-text-muted);
}

.dps-empty-icon {
  font-size: 32px;
  margin-bottom: 8px;
}

/* Skeletons */
.dps-skeleton-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.dps-skeleton-item {
  display: flex;
  gap: 12px;
}

.dps-skeleton-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--dps-bg-input);
}

.dps-skeleton-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.dps-skeleton-line {
  height: 12px;
  background: var(--dps-bg-input);
  border-radius: 4px;
  width: 100%;
}

.dps-skeleton-line.short { width: 30%; }
.dps-skeleton-line.medium { width: 70%; }

/* ==========================================================================
   Mobile Responsive (< 640px) - VnExpress Modern Mobile Experience
   ========================================================================== */
@media (max-width: 640px) {
  .dps-comment-root {
    padding-top: 18px;
    margin-top: 22px;
  }

  /* Header & Segmented Pill Tabs */
  .dps-comment-header {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    margin-bottom: 16px;
  }

  .dps-header-left {
    display: flex;
    align-items: center;
    justify-content: flex-start;
  }

  .dps-comment-title {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.01em;
  }

  .dps-header-right {
    width: 100%;
  }

  .dps-sort-tabs {
    display: flex;
    width: 100%;
    background-color: var(--dps-bg-subtle);
    padding: 3px;
    border-radius: var(--dps-radius-full);
    border: 1px solid var(--dps-border);
    box-sizing: border-box;
  }

  .dps-sort-btn {
    flex: 1;
    text-align: center;
    padding: 7px 6px;
    font-size: 12.5px;
    font-weight: 500;
    border-radius: var(--dps-radius-full);
    white-space: nowrap;
    transition: all 0.15s ease;
  }

  .dps-sort-btn.active {
    background-color: var(--dps-bg-main);
    color: var(--dps-primary);
    font-weight: 600;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  }

  /* Main Form Input Box */
  .dps-main-form-wrapper {
    margin-bottom: 20px;
  }

  .dps-comment-form {
    padding: 10px 14px;
    border-radius: 12px;
  }

  .dps-form-avatar .dps-avatar-img,
  .dps-form-avatar .dps-avatar-placeholder {
    width: 34px;
    height: 34px;
    font-size: 13px;
  }

  .dps-textarea {
    font-size: 14px;
    line-height: 1.45;
    min-height: 36px;
    padding: 5px 0 3px 0;
  }

  .dps-comment-form.dps-form-focused .dps-textarea {
    min-height: 64px;
  }

  /* Comment Stream */
  .dps-comments-stream {
    gap: 14px;
  }

  .dps-comment-body {
    gap: 10px;
  }

  .dps-comment-avatar .dps-avatar-img,
  .dps-comment-avatar .dps-avatar-placeholder {
    width: 34px;
    height: 34px;
    font-size: 13px;
  }

  .dps-comment-meta {
    gap: 4px 6px;
    margin-bottom: 2px;
  }

  .dps-author-name {
    font-size: 14px;
    font-weight: 700;
  }

  .dps-badge {
    font-size: 10px;
    padding: 1px 5px;
  }

  .dps-comment-time {
    font-size: 11.5px;
  }

  .dps-comment-text {
    font-size: 14.5px;
    line-height: 1.55;
    margin: 3px 0 6px 0;
  }

  /* Actions Bar on Mobile */
  .dps-comment-actions {
    gap: 16px;
  }

  .dps-action-btn {
    font-size: 12.5px;
    padding: 3px 4px;
  }

  .dps-action-btn svg {
    width: 14px;
    height: 14px;
  }

  /* Replies & Nested Threads on Mobile */
  .dps-replies-container {
    margin-left: 12px;
    padding-left: 10px;
    margin-top: 8px;
  }

  .dps-thread-line {
    width: 2px;
  }

  .dps-replies-list {
    gap: 10px;
    margin-top: 6px;
  }

  .dps-replies-list .dps-comment-avatar .dps-avatar-img,
  .dps-replies-list .dps-comment-avatar .dps-avatar-placeholder {
    width: 26px;
    height: 26px;
    font-size: 11px;
  }

  .dps-replies-list .dps-author-name {
    font-size: 13.5px;
  }

  .dps-replies-list .dps-comment-text {
    font-size: 14px;
    line-height: 1.5;
  }

  .dps-btn-view-replies {
    font-size: 12.5px;
    padding: 4px 0;
  }

  .dps-guest-fields {
    grid-template-columns: 1fr;
  }

  .dps-toast-notice {
    left: 16px;
    right: 16px;
    bottom: 16px;
    justify-content: center;
  }
}