/* ============================================================================
   Self-Compass AI Coach - CSS v3.0 (Auth Edition)
   ============================================================================
   New in v3.0:
   - Auth UI styles (Google/Facebook buttons)
   - User info display
   - Tier badges
   - Session limit notifications
   - Upgrade prompts
   ============================================================================ */

/* ============================================================================
   CSS VARIABLES
   ============================================================================ */
:root {
  /* Brand Colors */
  --bg: #FAFBFC;
  --panel: #FFFFFF;
  --ink: #1D3557;
  --muted: #5C6F82;
  --line: #E6ECF2;
  
  /* Message Bubbles */
  --user: #2F4288;
  --user-ink: #FFFFFF;
  --bot: #F5F5F5;
  --bot-ink: #1D3557;
  
  /* Call-to-Action */
  --cta: #FFB178;
  --cta-ink: #1C2E7A;
  --cta-hov: #D67B4C;
  
  /* Welcome Banner */
  --welcome-bg: #F0F7FF;
  --welcome-border: #B8D4F7;
  
  /* UI Elements */
  --surface-subtle: #F5F5F5;
  --border-subtle: #E0E0E0;
  --border-light: #D7D7D7;
  
  /* Tier Colors */
  --tier-free: #6B7280;
  --tier-starter: #059669;
  --tier-unlimited: #7C3AED;
  --tier-hybrid: #DC2626;
  
  /* Layout */
  --radius: 16px;
  --shadow: 0 4px 12px rgba(29,53,87,.08);
  --bubble-width-desktop: 86%;
  --bubble-width-mobile: 92%;
}

/* ============================================================================
   BASE & LAYOUT
   ============================================================================ */
#scapp, #scapp * { 
  box-sizing: border-box; 
}

html, body { 
  height: 100%; 
  margin: 0; 
}

#scapp {
  height: 100dvh;
  color: var(--ink);
  background: transparent;
  font: 16px/1.55 "Open Sans", system-ui, -apple-system, Segoe UI, Roboto, Arial;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

#scapp .container {
  height: 100%;
  display: flex;
  flex-direction: column;
  max-width: 980px;
  margin: 0 auto;
  padding: 24px;
  gap: 14px;
}

/* ============================================================================
   HEADER
   ============================================================================ */
#scapp .header {
  display: flex; 
  align-items: center; 
  justify-content: flex-start;
  padding: 16px 24px; 
  border: 1px solid var(--line);
  border-radius: var(--radius); 
  background: var(--panel); 
  box-shadow: var(--shadow);
  flex-wrap: wrap;
  gap: 12px;
}

#scapp .brand { 
  display: flex; 
  gap: 12px; 
  align-items: center; 
  min-width: 0; 
}

#scapp .logo { 
  width: 36px; 
  height: 36px; 
  border-radius: 10px; 
  display: grid; 
  place-items: center; 
  overflow: hidden; 
  border: 1px solid var(--border-light); 
  background: #fff; 
  flex: 0 0 auto; 
}

#scapp .logo img { 
  width: 100%; 
  height: 100%; 
  object-fit: contain; 
  display: block; 
}

#scapp .ttl { 
  font-weight: 700; 
  letter-spacing: .3px; 
  white-space: nowrap; 
}

#scapp .sub { 
  font-weight: 300; 
  font-size: 12px; 
  color: var(--muted); 
  white-space: nowrap; 
  overflow: hidden; 
  text-overflow: ellipsis; 
}

/* ============================================================================
   AUTH SECTION
   ============================================================================ */
#scapp .auth-section {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Auth buttons container */
#scapp .auth-buttons {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* Base auth button */
#scapp .btn-auth {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
  border: 1px solid var(--border-subtle);
  background: var(--panel);
  color: var(--ink);
}

#scapp .btn-auth:hover {
  background: var(--surface-subtle);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

#scapp .btn-auth svg {
  flex-shrink: 0;
}

/* Google button */
#scapp .btn-google {
  background: #fff;
}

#scapp .btn-google:hover {
  background: #f8f9fa;
  border-color: #dadce0;
}

/* Facebook button */
#scapp .btn-facebook {
  background: #1877F2;
  color: #fff;
  border-color: #1877F2;
}

#scapp .btn-facebook:hover {
  background: #166fe5;
  border-color: #166fe5;
}

#scapp .btn-facebook svg path {
  fill: #fff;
}

/* User info display (when logged in) */
#scapp .user-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

#scapp .user-details {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}

#scapp .user-email {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#scapp .user-tier {
  display: inline-flex;
  padding: 2px 8px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-radius: 4px;
}

#scapp .tier-free {
  background: #F3F4F6;
  color: var(--tier-free);
}

#scapp .tier-starter {
  background: #D1FAE5;
  color: var(--tier-starter);
}

#scapp .tier-unlimited {
  background: #EDE9FE;
  color: var(--tier-unlimited);
}

#scapp .tier-hybrid {
  background: #FEE2E2;
  color: var(--tier-hybrid);
}

#scapp .sessions-info {
  font-size: 11px;
  color: var(--muted);
}

/* Sign out button */
#scapp .btn-signout {
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 500;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
  border: 1px solid var(--border-subtle);
  background: transparent;
  color: var(--muted);
}

#scapp .btn-signout:hover {
  background: #FEF2F2;
  border-color: #FECACA;
  color: #DC2626;
}

/* ============================================================================
   SESSION BUTTONS
   ============================================================================ */
#scapp .session-controls {
  display: flex;
  gap: 8px;
}

#scapp .btn-session {
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
  border: 1px solid transparent;
}

#scapp .btn-end {
  background: #FEF3F2;
  color: #B42318;
  border-color: #FECDCA;
}

#scapp .btn-end:hover {
  background: #FEE4E2;
  border-color: #FDA29B;
}

#scapp .btn-end:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#scapp .btn-new {
  background: #ECFDF3;
  color: #027A48;
  border-color: #A6F4C5;
}

#scapp .btn-new:hover {
  background: #D1FADF;
  border-color: #6CE9A6;
}

/* ============================================================================
   CHAT LOG
   ============================================================================ */
#scapp .log {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
  overflow-y: auto; 
  flex: 1 1 auto;
  min-height: 300px;
  max-height: 60vh;
}

@media (min-height: 700px) { 
  #scapp .log { 
    min-height: 220px; 
  } 
}

#scapp .log::-webkit-scrollbar { 
  width: 10px; 
}

#scapp .log::-webkit-scrollbar-track { 
  background: var(--surface-subtle); 
  border-radius: 10px; 
}

#scapp .log::-webkit-scrollbar-thumb { 
  background: #d0d0d0; 
  border-radius: 10px; 
  transition: background 0.2s ease; 
}

#scapp .log::-webkit-scrollbar-thumb:hover { 
  background: #b0b0b0; 
}

/* ============================================================================
   MESSAGE ROWS & BUBBLES
   ============================================================================ */
#scapp .row { 
  display: flex; 
  gap: 10px; 
  margin: 8px 8px; 
  animation: fadeSlide 0.3s ease-out;
}

#scapp .row.you { 
  justify-content: flex-end; 
}

#scapp .row.system {
  justify-content: center;
}

#scapp .row.system .bubble {
  max-width: 90%;
  background: transparent;
  border: none;
  box-shadow: none;
}

#scapp .bubble {
  position: relative;
  max-width: var(--bubble-width-desktop);
  padding: 12px 16px;
  line-height: 1.48;
  transition: transform 0.15s ease;
}

#scapp .bubble:hover {
  transform: translateY(-1px);
}

@media (max-width: 640px) {
  #scapp .bubble { 
    max-width: var(--bubble-width-mobile); 
  }
}

/* User messages */
#scapp .you .bubble {
  background: linear-gradient(135deg, var(--user) 0%, #3d5299 100%);
  color: var(--user-ink);
  border-radius: 19px 19px 6px 19px;
}

#scapp .you .bubble .meta { 
  color: #CCC !important; 
}

#scapp .you .bubble .header-text {
  color: #FFFFFF;
}

/* Bot messages */
#scapp .bot .bubble {
  background: var(--bot); 
  color: var(--bot-ink);
  border-radius: 19px 19px 19px 6px;
  border: 1px solid var(--border-subtle);
  box-shadow: 0 1px 3px rgba(0,0,0,.03);
}

#scapp .name { 
  font-size: 12px; 
  color: var(--muted) !important; 
  margin: 0 0 6px 2px; 
}

#scapp .meta { 
  font-size: 11px; 
  color: var(--muted); 
  margin-top: 4px; 
  opacity: 0.5;
  transition: opacity 0.2s ease;
}

#scapp .bubble:hover .meta {
  opacity: 1;
}

#scapp .bubble a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: rgba(0,0,0,0.3);
  transition: text-decoration-color 0.15s ease;
}

#scapp .bubble a:hover {
  text-decoration-color: rgba(0,0,0,0.6);
}

/* ============================================================================
   SESSION LIMIT & UPGRADE NOTIFICATIONS
   ============================================================================ */
#scapp .session-limit,
#scapp .upgrade-options {
  background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
  border-radius: 12px;
  padding: 16px;
  border-left: 4px solid #F59E0B;
}

#scapp .session-limit strong,
#scapp .upgrade-options strong {
  color: #92400E;
  font-size: 15px;
}

#scapp .session-limit a,
#scapp .upgrade-options a {
  color: #B45309;
  font-weight: 600;
}

#scapp .tier-option {
  background: rgba(255,255,255,0.6);
  padding: 12px;
  border-radius: 8px;
  margin: 8px 0;
}

#scapp .tier-option strong {
  color: var(--ink);
}

/* Session ended message */
#scapp .session-ended {
  background: linear-gradient(135deg, #F0F7FF 0%, #E8F4FD 100%);
  border-radius: 12px;
  padding: 16px;
  border-left: 4px solid var(--user);
}

#scapp .session-ended strong {
  color: var(--user);
  font-size: 15px;
}

/* ============================================================================
   THINKING INDICATOR
   ============================================================================ */
#scapp .thinking-text {
  color: var(--muted);
  animation: thinkingPulse 1.5s ease-in-out infinite;
}

/* ============================================================================
   JUMP BUTTON
   ============================================================================ */
#scapp #jump {
  display: none;
  position: sticky;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--user);
  color: #fff;
  border: none;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  z-index: 10;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
  transition: all 0.15s ease;
}

#scapp #jump:hover {
  background: #3d5299;
  transform: translateX(-50%) translateY(-2px);
}

/* ============================================================================
   COMPOSER
   ============================================================================ */
#scapp .composer-wrapper {
  flex-shrink: 0;
}

#scapp .composer {
  display: flex;
  gap: 10px;
  align-items: flex-end;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 16px;
  box-shadow: var(--shadow);
}

#scapp #t {
  flex: 1;
  resize: none;
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 15px;
  line-height: 1.45;
  min-height: 44px;
  max-height: 200px;
  padding: 8px 0;
  background: transparent;
  color: var(--ink);
}

#scapp #t::placeholder {
  color: var(--muted);
  opacity: 0.7;
}

#scapp .send,
#scapp .stop {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

#scapp .send {
  background: var(--cta);
  color: var(--cta-ink);
}

#scapp .send:hover:not(:disabled) {
  background: var(--cta-hov);
  color: #fff;
  transform: translateY(-1px);
}

#scapp .send:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#scapp .stop {
  display: none;
  background: #FEE2E2;
  color: #DC2626;
}

#scapp .stop:hover {
  background: #FECACA;
}

#scapp #charcount {
  font-size: 11px;
  color: var(--muted);
  text-align: right;
  padding: 0 4px 4px 0;
  min-height: 16px;
}

#scapp .keyboard-hint {
  font-size: 11px;
  color: var(--muted);
  text-align: center;
  padding: 8px 0 0 0;
  opacity: 0.7;
}

/* ============================================================================
   FOOTER
   ============================================================================ */
#scapp footer { 
  font-size: 12px; 
  color: var(--muted); 
  text-align: center; 
  padding: 12px 0 8px 0;
  margin-top: 0;
}

#scapp .sep { 
  height: 1px; 
  background: var(--line); 
  margin: 8px 0 8px 0;
}

/* ============================================================================
   ANIMATIONS
   ============================================================================ */
@keyframes fadeSlide {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes thinkingPulse {
  0%, 100% { 
    opacity: 0.4; 
  }
  50% { 
    opacity: 1; 
  }
}

/* ============================================================================
   RESPONSIVE
   ============================================================================ */
@media (max-width: 640px) {
  #scapp .header {
    padding: 12px 16px;
  }
  
  #scapp .auth-section {
    width: 100%;
    justify-content: space-between;
    order: 3;
  }
  
  #scapp .auth-buttons {
    width: 100%;
    justify-content: center;
  }
  
  #scapp .user-info {
    width: 100%;
    justify-content: space-between;
  }
  
  #scapp .user-details {
    align-items: flex-start;
  }
  
  #scapp .session-controls {
    order: 2;
  }
  
  #scapp .btn-auth {
    flex: 1;
    justify-content: center;
  }
  
  #scapp .btn-session {
    padding: 6px 12px;
    font-size: 12px;
  }
  
  #scapp .container {
    padding: 16px;
  }
}

/* ============================================================================
   WELCOME BACK BANNER
   ============================================================================ */
#scapp .welcome-back {
  margin: 0 0 14px 0;
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

#scapp .welcome-back.welcome-visible {
  opacity: 1;
  transform: translateY(0);
}

#scapp .welcome-content {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: linear-gradient(135deg, #F0F7FF 0%, #E6F2FF 100%);
  border: 1px solid #B8D9FF;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(47, 66, 136, 0.08);
  position: relative;
}

#scapp .welcome-icon {
  font-size: 24px;
  flex-shrink: 0;
}

#scapp .welcome-text {
  flex: 1;
  min-width: 0;
}

#scapp .welcome-text strong {
  display: block;
  color: var(--user);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

#scapp .welcome-meta {
  display: block;
  font-size: 12px;
  color: var(--muted);
  font-weight: 400;
}

#scapp .welcome-close {
  position: absolute;
  top: 8px;
  right: 8px;
  background: transparent;
  border: none;
  font-size: 24px;
  color: var(--muted);
  cursor: pointer;
  padding: 4px 8px;
  line-height: 1;
  border-radius: 4px;
  transition: background-color 0.15s ease, color 0.15s ease;
}

#scapp .welcome-close:hover {
  background: rgba(0, 0, 0, 0.05);
  color: var(--ink);
}

/* ============================================================================
   END OF STYLESHEET
   ============================================================================ */