.csd-main {
  max-width: var(--max-width-container, 1280px);
  margin: 0 auto;
  padding: var(--space-12) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

@media (max-width: 640px) {
  .csd-main {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
    gap: var(--space-4);
  }
}

/* Breadcrumb */
.csd-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--color-on-surface-variant);
}

.csd-breadcrumb a {
  color: var(--color-on-surface-variant);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-base);
}

.csd-breadcrumb a:hover {
  color: var(--color-primary);
}

.csd-breadcrumb .material-symbols-outlined {
  font-size: 14px;
}

.csd-breadcrumb .active {
  color: var(--color-on-surface);
  font-weight: 700;
}

/* ============================================
   HERO SECTION (Split: 8/4)
   ============================================ */
.csd-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  align-items: stretch;
}

@media (min-width: 1024px) {
  .csd-hero-grid {
    grid-template-columns: minmax(0, 2fr) minmax(300px, 1fr);
  }
}

/* Hero image card */
.csd-hero {
  position: relative;
  min-height: 320px;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  box-shadow: var(--shadow-lg);
}

.csd-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.csd-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(0, 0, 0, 0.35) 65%, rgba(0, 0, 0, 0.85) 100%);
}

.csd-hero-content {
  position: relative;
  z-index: 2;
  padding: var(--space-8);
  color: var(--color-white);
  width: 100%;
}

.csd-hero-tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-3);
}

.csd-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.csd-tag.active {
  background: var(--color-secondary-container);
  color: var(--color-on-secondary-container);
}

.csd-tag.glass {
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(12px);
  color: var(--color-white);
}

.csd-tag .material-symbols-outlined {
  font-size: 13px;
}

.csd-hero-title {
  font-family: var(--font-family);
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin: 0 0 var(--space-3);
  color: var(--color-white);
}

@media (max-width: 768px) {
  .csd-hero-title { font-size: 28px; }
}

.csd-hero-desc {
  font-size: 15px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.92);
  max-width: 560px;
  margin: 0;
}

.csd-stats-card {
  background: var(--color-surface-container-lowest);
  color: var(--color-on-surface);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  box-shadow: var(--shadow-md);
}

.csd-stats-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-family);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-on-surface);
  margin: 0;
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-surface-container-high);
}

.csd-stats-title .material-symbols-outlined {
  color: var(--color-primary);
  font-size: 20px;
}

.csd-stats-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.csd-stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}

.csd-stat-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 50%;
  background: color-mix(in srgb, var(--color-primary) 8%, transparent);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.csd-stat-icon .material-symbols-outlined {
  font-size: 18px;
}

.csd-stat-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.csd-stat-label {
  font-size: 11px;
  color: var(--color-on-surface-variant);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.csd-stat-value {
  font-size: 18px;
  font-weight: 800;
  color: var(--color-on-surface);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.csd-stat-value.timer {
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.csd-join-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  margin-top: var(--space-2);
  padding: 13px 20px;
  background: var(--color-primary);
  color: var(--color-on-primary);
  border: none;
  border-radius: var(--radius-full);
  font-family: var(--font-family);
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 6px 18px color-mix(in srgb, var(--color-primary) 30%, transparent);
}

.csd-join-btn:hover:not(.joined) {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px color-mix(in srgb, var(--color-primary) 40%, transparent);
}

.csd-join-btn.joined {
  background: var(--color-secondary-container);
  color: var(--color-on-secondary-container);
  box-shadow: none;
  cursor: default;
}

.csd-join-btn .material-symbols-outlined {
  font-size: 18px;
}

/* ============================================
   CONTENT GRID (4/5/3)
   ============================================ */
.csd-content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

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

@media (min-width: 1100px) {
  .csd-content-grid {
    grid-template-columns: 1fr 1.2fr 0.9fr;
  }
}

/* Shared card */
.csd-card {
  background: var(--color-surface-container-lowest);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.csd-card-title {
  font-family: var(--font-family);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-on-surface);
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 var(--space-5);
}

.csd-card-title .material-symbols-outlined {
  color: var(--color-primary);
  font-size: 22px;
}

/* Why Join */
.csd-benefits {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.csd-benefit {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}

.csd-benefit-icon {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-lg);
  background: var(--color-surface-container);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.csd-benefit-icon .material-symbols-outlined {
  font-size: 22px;
}

.csd-benefit-body h4 {
  font-family: var(--font-family);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-on-surface);
  margin: 0 0 2px;
  letter-spacing: -0.015em;
}

.csd-benefit-body p {
  font-size: 12px;
  color: var(--color-on-surface-variant);
  line-height: 1.5;
  margin: 0;
}

/* Task list */
.csd-task-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-5);
  gap: var(--space-3);
  flex-wrap: wrap;
}

.csd-task-header .csd-card-title { margin: 0; }

.csd-task-count {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  background: var(--color-surface-container);
  color: var(--color-on-surface-variant);
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
}

.csd-tasks {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.csd-task {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-surface-container-low);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
}

.csd-task:hover {
  background: var(--color-surface-container-high);
}

.csd-task input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
  cursor: pointer;
}

.csd-task-body {
  flex: 1;
  min-width: 0;
}

.csd-task-title {
  font-family: var(--font-family);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-on-surface);
  margin: 0 0 2px;
  letter-spacing: -0.015em;
  transition: color var(--transition-base);
}

.csd-task:hover .csd-task-title {
  color: var(--color-primary);
}

.csd-task-sub {
  font-size: 11px;
  color: var(--color-on-surface-variant);
  margin: 0;
}

.csd-task input[type="checkbox"]:checked ~ .csd-task-body .csd-task-title {
  text-decoration: line-through;
  color: var(--color-on-surface-variant);
}

.csd-task .material-symbols-outlined {
  color: var(--color-outline-variant);
  font-size: 18px;
}

/* Side column (Reward + Rules) */
.csd-side {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

/* Reward card */
.csd-reward {
  background: var(--color-secondary-container);
  color: var(--color-on-secondary-container);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.csd-reward-label {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.8;
  margin-bottom: var(--space-4);
}

.csd-reward-visual {
  position: relative;
  width: 120px;
  height: 120px;
  margin: 0 auto var(--space-4);
}

.csd-reward-pulse {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.4);
  border-radius: 50%;
  animation: csd-pulse 2s ease-in-out infinite;
}

@keyframes csd-pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.08); opacity: 0.8; }
}

.csd-reward-badge {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  box-shadow: var(--shadow-md);
}

.csd-reward-title {
  font-family: var(--font-family);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-2);
  line-height: 1.2;
}

.csd-reward-desc {
  font-size: 12px;
  line-height: 1.5;
  opacity: 0.85;
  margin: 0;
}

/* Rules */
.csd-rules {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.csd-rule {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  color: var(--color-on-surface-variant);
  line-height: 1.5;
}

.csd-rule .material-symbols-outlined {
  font-size: 18px;
  margin-top: 1px;
  flex-shrink: 0;
}

.csd-rule .material-symbols-outlined.ok {
  color: var(--color-primary);
}

.csd-rule .material-symbols-outlined.bad {
  color: var(--color-error);
}

/* ============================================
   COMMUNITY MOMENTS
   ============================================ */
.csd-moments-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-5);
}

.csd-moments-header h3 {
  font-family: var(--font-family);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-on-surface);
  margin: 0 0 2px;
}

.csd-moments-header p {
  font-size: 13px;
  color: var(--color-on-surface-variant);
  margin: 0;
}

.csd-moments-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
  transition: all var(--transition-base);
}

.csd-moments-link:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.csd-moments-link .material-symbols-outlined {
  font-size: 16px;
}

.csd-moments {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-3);
}

.csd-moment {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
}

.csd-moment img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.csd-moment:hover img {
  transform: scale(1.1);
}

.csd-moment-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  opacity: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--transition-base);
}

.csd-moment:hover .csd-moment-overlay {
  opacity: 1;
}

.csd-moment-overlay .material-symbols-outlined {
  color: var(--color-white);
  font-size: 28px;
  font-variation-settings: 'FILL' 1;
}

.csd-moment-add {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  background: var(--color-surface-container);
  border: 2px dashed var(--color-outline-variant);
  color: var(--color-on-surface-variant);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

.csd-moment-add:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-surface-container-low);
}

.csd-moment-add .material-symbols-outlined {
  font-size: 28px;
}

.csd-moment-add span:last-child {
  font-size: 11px;
  font-weight: 700;
}