:root {
  --color-primary: #292952;
  --color-primary-dark: #1e1e3e;
  --color-primary-light: #3d3d75;
  --color-gold: #c6a75e;
  --color-gold-light: #dfc88a;
  --color-gold-bg: rgba(198, 167, 94, 0.1);
  --color-ivory: #faf8f2;
  --color-white: #ffffff;
  --color-text-dark: #292952;
  --color-text-mid: #5a5a7a;
  --color-text-light: #8e8ea6;
  --color-border: #292952; /* Structured High-Contrast Solid Borders */
  --color-card-bg: #ffffff;
  
  /* Geometric Sharp Edges System */
  --radius-sm: 0px;
  --radius-md: 0px;
  --radius-lg: 0px;
  --radius-xl: 0px;
  
  --shadow-subtle: none;
  --shadow-card: none;
  --shadow-hover: 0 6px 0 rgba(41, 41, 82, 0.15); /* Retro/Flat Hard Shadow */
  --font-family: 'Onest', system-ui, -apple-system, sans-serif;
  --transition-fast: 0.15s ease-out;
  --transition-smooth: 0.25s ease-out;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  background-color: var(--color-ivory);
  font-family: var(--font-family);
  color: var(--color-text-dark);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 60px;
}

/* Header & Geometric Branding Banner */
.app-header {
  background: var(--color-primary-dark);
  color: var(--color-white);
  padding: 20px 16px;
  border-bottom: 3px solid var(--color-gold);
  width: 100%;
}

.header-container {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand-wrapper {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.brand-logo {
  height: 48px;
  width: auto;
  max-width: 100%;
}

.brand-subtitle {
  font-size: 0.72rem;
  color: var(--color-gold);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  line-height: 1.2;
}

.sprint-badge {
  background-color: transparent;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.sprint-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background-color: #22c55e;
}

/* Main Bounded Container */
.main-content {
  width: 100%;
  max-width: 640px; /* Snug Bounded Column Width */
  margin: 24px auto;
  padding: 0 16px; /* Bounded inside margins */
}

.section-intro {
  margin-bottom: 24px;
  text-align: left; /* Geometric Left-Aligned Structure */
  border-left: 4px solid var(--color-gold);
  padding-left: 12px;
}

.section-intro h2 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: -0.01em;
}

.section-intro p {
  color: var(--color-text-mid);
  font-size: 0.85rem;
  margin-top: 4px;
}

/* 7-DAY GEOMETRIC ACCORDION */
.days-vertical-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
}

.day-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.day-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 3px 3px 0 var(--color-primary);
}

.day-card.is-today-highlight {
  border: 2px solid var(--color-gold);
}

.day-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  cursor: pointer;
  background: var(--color-white);
  user-select: none;
  border-bottom: none;
}

.day-card.expanded .day-card-header {
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-gold-bg);
}

.day-header-left {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.day-number-badge {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.day-purpose-text {
  font-size: 0.78rem;
  color: var(--color-text-mid);
  font-weight: 600;
}

.day-header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.today-indicator-pill {
  background-color: var(--color-gold);
  color: var(--color-primary-dark);
  font-size: 0.6rem;
  font-weight: 800;
  padding: 2px 6px;
  letter-spacing: 0.05em;
}

.expand-arrow-icon {
  font-size: 0.7rem;
  color: var(--color-primary);
}

/* Expanded Card Area */
.day-card-content {
  padding: 16px;
  background-color: var(--color-ivory);
}

/* Vertically Stacked Cascaded Cards */
.cascaded-stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
}

.post-card {
  display: flex;
  flex-direction: column;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.empty-post-card {
  background: rgba(41, 41, 82, 0.02);
  border: 1px dashed var(--color-border);
  padding: 24px;
  text-align: center;
  color: var(--color-text-light);
  font-size: 0.8rem;
  text-transform: uppercase;
}

.post-slot-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.post-slot-header .platform-badge {
  background: rgba(255, 255, 255, 0.15);
  padding: 2px 6px;
  font-size: 0.68rem;
  font-weight: 600;
}

.video-type-badge {
  background-color: var(--color-gold);
  color: var(--color-primary-dark);
  padding: 2px 6px;
  font-weight: 800;
  font-size: 0.68rem;
  margin-left: 6px;
}

.post-image-container {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: #0b0b14;
  cursor: pointer;
  border-bottom: 1px solid var(--color-border);
}

.post-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-overlay-hint {
  position: absolute;
  inset: 0;
  background: rgba(41, 41, 82, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-fast);
  color: #fff;
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.post-image-container:hover .image-overlay-hint {
  opacity: 1;
}

/* VIDEO CARD PREVIEW */
.video-preview {
  position: relative;
}

.post-video-element {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.play-overlay-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-gold);
  color: var(--color-primary-dark);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  padding-left: 2px;
  box-shadow: 3px 3px 0 var(--color-primary);
  pointer-events: none;
}

.card-video-controls {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: var(--color-primary-dark);
  color: #ffffff;
  padding: 2px 8px;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* CARD DETAILS */
.post-body {
  padding: 14px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.post-title {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: -0.01em;
}

.post-caption {
  font-size: 0.82rem;
  color: var(--color-text-mid);
  white-space: pre-line;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-hashtags {
  font-size: 0.75rem;
  color: var(--color-gold);
  font-weight: 700;
  margin-bottom: 12px;
  word-break: break-word;
}

.post-actions {
  margin-top: auto;
  display: flex;
  gap: 6px;
  padding-top: 10px;
  border-top: 1px solid var(--color-border);
}

.action-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 8px 2px;
  font-size: 0.72rem;
  font-weight: 800;
  cursor: pointer;
  border: 1px solid var(--color-border);
  background-color: #ffffff;
  color: var(--color-primary);
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.action-btn:hover {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.action-btn-gold {
  background-color: var(--color-gold-bg);
  border-color: var(--color-gold);
  color: var(--color-primary-dark);
}

.action-btn-gold:hover {
  background-color: var(--color-gold);
  color: #ffffff;
  border-color: var(--color-gold);
}

/* GEOMETRIC LIGHTBOX MODAL */
.lightbox-modal {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 15, 30, 0.96);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.lightbox-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--color-gold);
  border: 1px solid var(--color-primary-dark);
  color: var(--color-primary-dark);
  font-size: 18px;
  width: 40px;
  height: 40px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  z-index: 1010;
}

.lightbox-close-btn:hover {
  background-color: var(--color-white);
}

.lightbox-content {
  position: relative;
  max-width: 600px;
  width: 92%;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-image-wrapper {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  border: 2px solid var(--color-gold);
  background-color: #050508;
}

.lightbox-image {
  max-width: 100%;
  max-height: 65vh;
  object-fit: contain;
}

.lightbox-meta {
  margin-top: 16px;
  text-align: left;
  color: var(--color-white);
  border-left: 3px solid var(--color-gold);
  padding-left: 10px;
  width: 100%;
}

.lightbox-title {
  font-size: 0.95rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.lightbox-subtitle {
  font-size: 0.78rem;
  color: var(--color-gold);
  text-transform: uppercase;
}

/* TOAST NOTIFICATION */
.toast-notification {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  border: 1px solid var(--color-gold);
  padding: 10px 20px;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  z-index: 2000;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
  opacity: 0;
  pointer-events: none;
}

.toast-notification.active {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* LIGHTBOX CAROUSEL NAVIGATION */
.lightbox-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 100;
  width: 44px;
  height: 44px;
  background-color: rgba(26, 26, 51, 0.8);
  border: 1px solid var(--color-gold);
  color: var(--color-white);
  font-size: 1.8rem;
  line-height: 1;
  display: none; /* Controlled dynamically in JS */
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.lightbox-nav-btn:hover {
  background-color: var(--color-gold);
  color: var(--color-primary-dark);
}

.lightbox-prev-btn {
  left: 0;
  border-left: none;
}

.lightbox-next-btn {
  right: 0;
  border-right: none;
}

.lightbox-slide-counter {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 100;
  background-color: rgba(26, 26, 51, 0.85);
  color: var(--color-gold);
  border: 1px solid var(--color-gold);
  padding: 4px 10px;
  font-size: 0.72rem;
  font-weight: 700;
  font-family: monospace;
  display: none; /* Controlled dynamically in JS */
}