/* ===========================================
   InkCircle Design System
   A social network for creative writers
   =========================================== */

/* --- Design Tokens --- */
:root {
  /* Colors - Warm, inviting palette with ink/paper vibes */
  --color-primary-50: #fdf8f3;
  --color-primary-100: #f9ede0;
  --color-primary-200: #f2d9c0;
  --color-primary-300: #e9bf95;
  --color-primary-400: #de9d64;
  --color-primary-500: #d4823f;
  --color-primary-600: #c66a2e;
  --color-primary-700: #a55327;
  --color-primary-800: #854426;
  --color-primary-900: #6c3922;

  --color-ink-50: #f8f7f6;
  --color-ink-100: #f0eeec;
  --color-ink-200: #ddd9d5;
  --color-ink-300: #c4bdb6;
  --color-ink-400: #a69d94;
  --color-ink-500: #8f847a;
  --color-ink-600: #7a6f65;
  --color-ink-700: #635a53;
  --color-ink-800: #524b46;
  --color-ink-900: #46413d;
  --color-ink-950: #272422;

  --color-accent: #6366f1;
  --color-accent-light: #818cf8;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;

  /* Semantic */
  --color-bg: #fdfcfb;
  --color-bg-secondary: #f8f7f6;
  --color-bg-card: #ffffff;
  --color-text: #272422;
  --color-text-secondary: #635a53;
  --color-text-muted: #8f847a;
  --color-border: #ddd9d5;
  --color-border-light: #f0eeec;

  /* Typography Scale */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-display: 'Crimson Pro', Georgia, 'Times New Roman', serif;
  
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;

  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  /* Spacing Scale */
  --space-0: 0;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.07);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.08);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
}

/* --- Layout --- */
.app-container {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 280px;
  background: var(--color-bg-card);
  border-right: 1px solid var(--color-border-light);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
}

.main-content {
  flex: 1;
  margin-left: 280px;
  padding: var(--space-8);
  max-width: 1200px;
}

.content-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: var(--space-8);
}

.feed {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.right-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

/* --- Logo & Branding --- */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-700));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--text-xl);
}

.logo-text {
  font-family: var(--font-family-display);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-ink-950);
}

/* --- Navigation --- */
.nav-section {
  margin-bottom: var(--space-6);
}

.nav-section-title {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
  padding-left: var(--space-3);
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-lg);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: var(--font-medium);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.nav-item:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text);
}

.nav-item.active {
  background: var(--color-primary-100);
  color: var(--color-primary-700);
}

.nav-item-icon {
  width: 20px;
  height: 20px;
  opacity: 0.7;
}

.nav-item.active .nav-item-icon {
  opacity: 1;
}

.nav-badge {
  margin-left: auto;
  background: var(--color-primary-500);
  color: white;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

/* --- User Profile (Sidebar) --- */
.user-profile-mini {
  margin-top: auto;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  object-fit: cover;
  background: var(--color-primary-200);
}

.user-avatar-placeholder {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary-300), var(--color-primary-500));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
}

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

.user-name {
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-handle {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* --- Cards --- */
.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.card-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

.card-body {
  padding: var(--space-6);
}

.card-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border-light);
  background: var(--color-bg-secondary);
}

/* --- Composer --- */
.composer {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  padding: var(--space-5);
}

.composer-input-area {
  display: flex;
  gap: var(--space-4);
}

.composer-textarea {
  flex: 1;
  resize: none;
  border: none;
  outline: none;
  font-family: var(--font-family);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  min-height: 60px;
  padding: var(--space-2);
  background: transparent;
}

.composer-textarea::placeholder {
  color: var(--color-text-muted);
}

.composer-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-light);
}

.composer-tools {
  display: flex;
  gap: var(--space-2);
}

.composer-tool {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.composer-tool:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text);
}

/* --- Posts --- */
.post {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  padding: var(--space-6);
}

.post-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.post-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  object-fit: cover;
  flex-shrink: 0;
}

.post-meta {
  flex: 1;
  min-width: 0;
}

.post-author {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.post-author-name {
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

.post-author-handle {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.post-timestamp {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.post-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
}

.post-badge.milestone {
  background: var(--color-success);
  color: white;
}

.post-badge.snippet {
  background: var(--color-accent);
  color: white;
}

.post-badge.struggle {
  background: var(--color-warning);
  color: white;
}

.post-content {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.post-content p {
  margin-bottom: var(--space-3);
}

.post-content p:last-child {
  margin-bottom: 0;
}

/* Progress Bar in Posts */
.progress-display {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin: var(--space-4) 0;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-sm);
  margin-bottom: var(--space-2);
}

.progress-title {
  font-weight: var(--font-medium);
  color: var(--color-text);
}

.progress-count {
  color: var(--color-text-muted);
}

.progress-bar {
  height: 8px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary-500), var(--color-primary-600));
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

/* Snippet Box */
.snippet-box {
  background: var(--color-ink-50);
  border-left: 3px solid var(--color-accent);
  padding: var(--space-4);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: var(--space-4) 0;
  font-family: var(--font-family-display);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-ink-800);
  font-style: italic;
}

/* Post Actions */
.post-actions {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-light);
}

.post-action {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.post-action:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text);
}

.post-action.active {
  color: var(--color-primary-600);
}

.post-action svg {
  width: 18px;
  height: 18px;
}

/* --- Sprint Card --- */
.sprint-card {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
  color: white;
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
}

.sprint-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
}

.sprint-card-content {
  position: relative;
  z-index: 1;
}

.sprint-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  margin-bottom: var(--space-2);
}

.sprint-status-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: #4ade80;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.sprint-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-1);
}

.sprint-meta {
  font-size: var(--text-sm);
  opacity: 0.9;
  margin-bottom: var(--space-4);
}

.sprint-timer {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  font-variant-numeric: tabular-nums;
  margin-bottom: var(--space-4);
}

.sprint-participants {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.sprint-avatars {
  display: flex;
}

.sprint-avatar {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-accent);
  margin-left: -8px;
}

.sprint-avatar:first-child {
  margin-left: 0;
}

.sprint-participant-count {
  font-size: var(--text-sm);
  margin-left: var(--space-2);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-lg);
  font-family: var(--font-family);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
}

.btn-primary {
  background: var(--color-primary-600);
  color: white;
}

.btn-primary:hover {
  background: var(--color-primary-700);
}

.btn-secondary {
  background: var(--color-bg-secondary);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-border-light);
}

.btn-accent {
  background: white;
  color: var(--color-accent);
}

.btn-accent:hover {
  background: rgba(255,255,255,0.9);
}

.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-base);
}

.btn-full {
  width: 100%;
}

/* --- Beta Request Card --- */
.beta-request {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-bg-secondary);
  margin-bottom: var(--space-4);
}

.beta-request:last-child {
  margin-bottom: 0;
}

.beta-request-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.beta-request-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
}

.beta-request-author {
  font-weight: var(--font-medium);
  font-size: var(--text-sm);
}

.beta-request-genre {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.beta-request-title {
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  margin-bottom: var(--space-2);
}

.beta-request-details {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.beta-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.beta-tag {
  padding: 2px 8px;
  background: var(--color-bg-card);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

/* --- Circle Cards --- */
.circle-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.circle-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  transition: background var(--transition-fast);
  cursor: pointer;
}

.circle-item:hover {
  background: var(--color-bg-secondary);
}

.circle-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-lg);
}

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

.circle-name {
  font-weight: var(--font-medium);
  font-size: var(--text-sm);
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.circle-members {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* --- Stats Widget --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.stat-item {
  text-align: center;
  padding: var(--space-4);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
}

.stat-value {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-primary-600);
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Streak Display --- */
.streak-display {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: linear-gradient(135deg, var(--color-warning), #f97316);
  color: white;
  border-radius: var(--radius-lg);
}

.streak-icon {
  font-size: var(--text-2xl);
}

.streak-info {
  flex: 1;
}

.streak-count {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
}

.streak-label {
  font-size: var(--text-xs);
  opacity: 0.9;
}

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-6);
  color: var(--color-text-muted);
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

.empty-state-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.empty-state-text {
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
}

/* --- Loading States --- */
.skeleton {
  background: linear-gradient(90deg, var(--color-bg-secondary) 0%, var(--color-border-light) 50%, var(--color-bg-secondary) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
}

.skeleton-text {
  height: 16px;
  width: 100%;
}

.skeleton-text-short {
  height: 16px;
  width: 60%;
}

/* --- Focus States (Accessibility) --- */
:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

/* --- Responsive --- */
@media (max-width: 1200px) {
  .content-grid {
    grid-template-columns: 1fr;
  }
  
  .right-sidebar {
    display: none;
  }
}

@media (max-width: 768px) {
  .sidebar {
    display: none;
  }
  
  .main-content {
    margin-left: 0;
    padding: var(--space-4);
  }
}

/* --- Utilities --- */
.text-muted {
  color: var(--color-text-muted);
}

.text-sm {
  font-size: var(--text-sm);
}

.font-medium {
  font-weight: var(--font-medium);
}

.font-semibold {
  font-weight: var(--font-semibold);
}

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }

.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }