/* 
 * Layout
 * Mobile-first, functional structure
 */

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh; /* Dynamic viewport height for mobile */
  max-width: 100%;
  overflow: hidden;
}

/* Main Area - Takes remaining space */
#main-area {
  flex: 1;
  overflow: hidden;
  position: relative;
}

/* Views */
.view {
  display: none;
  height: 100%;
  width: 100%;
  flex-direction: column;
  align-items: center;
  overflow: hidden;
}

.view.active {
  display: flex;
}

/* Input Area - Fixed at bottom (Mobile default) */
#input-area {
  --input-area-height: 130px; /* Used by chat overlay */
  display: flex;
  height: 60px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-top: var(--border-width) solid var(--border-color);
  background: var(--main-background-color);
  padding: var(--space-3) var(--space-4);
  position: relative;
  z-index: 50; /* Above chat overlay */
}

.input_area_container {
  width: 100%;
  max-width: 1000px;
  display: flex;
  flex-direction: column;
}

/* Desktop Layout */
@media (min-width: 768px) {
  #app {
    flex-direction: row;
    margin: 0 auto;
    /* border-left: var(--border-width) solid var(--border-color); */
    /* border-right: var(--border-width) solid var(--border-color); */
  }

  #input-area {
    width: 60px;
    height: 100%;
    border-top: none;
    border-right: var(--border-width) solid var(--border-color);
    padding: var(--space-4) var(--space-2);
  }

  .input_area_container {
    height: 100%;
    max-width: none;
  }
}

@media (min-width: 1200px) {
  #app {
  }
}

/* =================================================================
   PREMIUM SYMPOSIUM LOADING STATE
   ================================================================= */

.symposium-loading-state {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--main-background-color) 0%, var(--main-background-color-secondary) 50%, var(--main-background-color-third) 100%);
  animation: symposiumLoadingFadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  position: relative;
}

/* Ambient background gradient animation */
.symposium-loading-state::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 50% 50%, 
    rgba(0, 0, 0, 0.02) 0%, 
    transparent 50%);
  animation: ambientRotate 20s linear infinite;
  pointer-events: none;
}

.symposium-loading-content {
  text-align: center;
  position: relative;
  z-index: 1;
  animation: contentEntrance 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275) 0.2s backwards;
}

/* Logo Wrapper - Contains logo, glow, and particles */
.symposium-logo-wrapper {
  position: relative;
  width: 320px;
  height: 210px;
  margin: 0 auto var(--space-8);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Enhanced Symposium Logo */
.symposium-loading-logo {
  width: 300px !important;
  aspect-ratio: 16/10.5;
  border-radius: 150px 150px 0 0;
  position: relative;
  overflow: hidden;
  background: var(--main-background-color-third);
  isolation: isolate;
  box-sizing: border-box;
  box-shadow: 
    0 8px 32px rgba(0, 0, 0, 0.08),
    0 2px 8px rgba(0, 0, 0, 0.04);
  animation: 
    logoEntrance 1s cubic-bezier(0.175, 0.885, 0.32, 1.275) 0.3s backwards,
    logoBreathing 4s ease-in-out 1.3s infinite;
  
  --logo-stop-1: var(--main-background-color);
  --logo-stop-2: var(--main-background-color-third);
}

/* Dark mode gradient adjustment */
html[data-theme="dark"] .symposium-loading-logo {
  --logo-stop-1: var(--main-background-color);
  --logo-stop-2: var(--main-background-color-third);
}

/* Liquid glass theme */
html[data-theme="liquid-glass"] .symposium-loading-state {
  backdrop-filter: blur(20px);
  background: rgba(255, 255, 255, 0.4);
}

html[data-theme="liquid-glass"] .symposium-loading-logo {
  background: rgba(245, 245, 245, 0.6);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.5);
}

/* Animated gradient inside logo */
.symposium-loading-logo::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    135deg,
    var(--logo-stop-1) 0%,
    var(--logo-stop-1) 30%,
    var(--logo-stop-2) 70%,
    var(--logo-stop-2) 100%
  );
  animation: 
    symposium-logo-drift 15s cubic-bezier(0.4, 0, 0.2, 1) infinite,
    symposium-logo-pulse 8s cubic-bezier(0.4, 0, 0.2, 1) infinite;
  z-index: -1;
  will-change: transform, filter;
  backface-visibility: hidden;
}

/* Shimmer effect sweep */
.symposium-loading-logo::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -150%;
  width: 80%;
  height: 200%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.3) 50%,
    transparent 100%
  );
  transform: skewX(-20deg);
  animation: shimmerSweep 3s ease-in-out 1.5s infinite;
}

html[data-theme="dark"] .symposium-loading-logo::after {
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.1) 50%,
    transparent 100%
  );
}

/* Glow ring around logo */
.logo-glow-ring {
  position: absolute;
  width: 320px;
  height: 210px;
  border-radius: 160px 160px 0 0;
  border: 2px solid transparent;
  background: linear-gradient(135deg, 
    rgba(26, 26, 26, 0.1) 0%, 
    rgba(26, 26, 26, 0.05) 100%);
  opacity: 0;
  animation: glowRingPulse 4s ease-in-out 1s infinite;
  pointer-events: none;
}

html[data-theme="dark"] .logo-glow-ring {
  background: linear-gradient(135deg, 
    rgba(229, 229, 229, 0.15) 0%, 
    rgba(229, 229, 229, 0.08) 100%);
}

/* Floating particles orbiting the logo */
.floating-particles {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--color-ink-lighter);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat 8s ease-in-out infinite;
}

html[data-theme="dark"] .particle {
  background: var(--color-ink-light);
}

/* Deep Blue theme */
html[data-theme="deep-blue"] .symposium-loading-logo {
  --logo-stop-1: var(--main-background-color);
  --logo-stop-2: var(--main-background-color-third);
}

html[data-theme="deep-blue"] .symposium-loading-logo::after {
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(56, 189, 248, 0.15) 50%,
    transparent 100%
  );
}

html[data-theme="deep-blue"] .logo-glow-ring {
  background: linear-gradient(135deg, 
    rgba(56, 189, 248, 0.2) 0%, 
    rgba(56, 189, 248, 0.1) 100%);
}

html[data-theme="deep-blue"] .particle {
  background: #38bdf8;
}

/* Dark Brown theme */
html[data-theme="dark-brown"] .symposium-loading-logo {
  --logo-stop-1: var(--main-background-color);
  --logo-stop-2: var(--main-background-color-third);
}

html[data-theme="dark-brown"] .symposium-loading-logo::after {
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(212, 165, 116, 0.15) 50%,
    transparent 100%
  );
}

html[data-theme="dark-brown"] .logo-glow-ring {
  background: linear-gradient(135deg, 
    rgba(212, 165, 116, 0.2) 0%, 
    rgba(212, 165, 116, 0.1) 100%);
}

html[data-theme="dark-brown"] .particle {
  background: #d4a574;
}

/* Dark Green theme */
html[data-theme="dark-green"] .symposium-loading-logo {
  --logo-stop-1: var(--main-background-color);
  --logo-stop-2: var(--main-background-color-third);
}

html[data-theme="dark-green"] .symposium-loading-logo::after {
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(110, 231, 183, 0.15) 50%,
    transparent 100%
  );
}

html[data-theme="dark-green"] .logo-glow-ring {
  background: linear-gradient(135deg, 
    rgba(110, 231, 183, 0.2) 0%, 
    rgba(110, 231, 183, 0.1) 100%);
}

html[data-theme="dark-green"] .particle {
  background: #6ee7b7;
}

/* Dark Red theme */
html[data-theme="dark-red"] .symposium-loading-logo {
  --logo-stop-1: var(--main-background-color);
  --logo-stop-2: var(--main-background-color-third);
}

html[data-theme="dark-red"] .symposium-loading-logo::after {
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(232, 116, 140, 0.15) 50%,
    transparent 100%
  );
}

html[data-theme="dark-red"] .logo-glow-ring {
  background: linear-gradient(135deg, 
    rgba(232, 116, 140, 0.2) 0%, 
    rgba(232, 116, 140, 0.1) 100%);
}

html[data-theme="dark-red"] .particle {
  background: #e8748c;
}

.particle-1 {
  top: 20%;
  left: 10%;
  animation-delay: 0s;
  animation-duration: 7s;
}

.particle-2 {
  top: 30%;
  right: 15%;
  animation-delay: 1.5s;
  animation-duration: 8s;
}

.particle-3 {
  bottom: 35%;
  left: 20%;
  animation-delay: 3s;
  animation-duration: 7.5s;
}

.particle-4 {
  bottom: 25%;
  right: 10%;
  animation-delay: 4.5s;
  animation-duration: 8.5s;
}

/* Loading text section */
.symposium-loading-text {
  animation: textFadeIn 0.8s ease-out 0.6s backwards;
}

.loading-title {
  font-size: var(--text-2xl);
  font-weight: var(--weight-semibold);
  color: var(--color-ink);
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}

.loading-subtitle {
  font-size: var(--text-base);
  color: var(--color-ink-light);
  margin-bottom: var(--space-4);
}

/* Animated loading dots */
.loading-dots {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  align-items: center;
  height: 20px;
}

.loading-dots span {
  width: 6px;
  height: 6px;
  background: var(--color-ink-lighter);
  border-radius: 50%;
  animation: dotPulse 1.4s ease-in-out infinite;
}

.loading-dots span:nth-child(1) {
  animation-delay: 0s;
}

.loading-dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.loading-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

/* =================================================================
   ANIMATIONS
   ================================================================= */

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

@keyframes contentEntrance {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes logoEntrance {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes logoBreathing {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.02);
  }
}

@keyframes shimmerSweep {
  0% {
    left: -150%;
  }
  50%, 100% {
    left: 150%;
  }
}

@keyframes glowRingPulse {
  0%, 100% {
    opacity: 0;
    transform: scale(1);
  }
  50% {
    opacity: 0.4;
    transform: scale(1.05);
  }
}

@keyframes particleFloat {
  0%, 100% {
    opacity: 0;
    transform: translate(0, 0) scale(1);
  }
  10% {
    opacity: 0.6;
  }
  50% {
    opacity: 0.8;
    transform: translate(var(--tx, 20px), var(--ty, -30px)) scale(1.2);
  }
  90% {
    opacity: 0.6;
  }
}

.particle-1 {
  --tx: 15px;
  --ty: -25px;
}

.particle-2 {
  --tx: -20px;
  --ty: -35px;
}

.particle-3 {
  --tx: -15px;
  --ty: 30px;
}

.particle-4 {
  --tx: 25px;
  --ty: 20px;
}

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

@keyframes dotPulse {
  0%, 100% {
    opacity: 0.3;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.3);
  }
}

@keyframes ambientRotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* =================================================================
   LEGACY LOADING STATE (for in-app loading)
   ================================================================= */

.loading-state {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  min-height: 200px;
  background: var(--main-background-color-secondary);
  animation: loadingFadeIn 0.3s ease-out;
}

.loading-content {
  text-align: center;
  max-width: 300px;
  padding: var(--space-6);
}

.loading-icon {
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--color-ink-lighter);
  margin-bottom: var(--space-4);
  animation: loadingPulse 2s infinite ease-in-out;
}

.loading-icon svg {
  width: 48px;
  height: 48px;
  stroke-width: 1.5;
}

/* Size Variants */
.loading-state.loading-sm .loading-icon svg {
  width: 32px;
  height: 32px;
}
.loading-state.loading-sm .loading-title {
  font-size: var(--text-base);
}

/* Transparent Variant */
.loading-state.loading-transparent {
  background: transparent;
}

@keyframes loadingPulse {
  0% { opacity: 0.4; transform: scale(0.95); }
  50% { opacity: 0.8; transform: scale(1); }
  100% { opacity: 0.4; transform: scale(0.95); }
}

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

/* View Transitions */
.view-fade-in {
  animation: viewFadeIn 0.3s ease-out forwards;
}

/* Context Switch Loading Overlay */
.context-loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease-in-out;
}

.context-loading-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.context-loading-content {
  background: var(--main-background-color);
  padding: var(--space-6) var(--space-8);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  border: var(--border-width) solid var(--border-color);
  animation: contextLoadingPop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.context-loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--color-ink);
  border-radius: 50%;
  animation: contextSpin 0.8s linear infinite;
}

.context-loading-text {
  font-weight: var(--weight-medium);
  color: var(--color-ink);
}

@keyframes contextSpin {
  to { transform: rotate(360deg); }
}

@keyframes contextLoadingPop {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

@keyframes viewFadeIn {
  from { 
    opacity: 0;
    transform: translateY(4px);
  }
  to { 
    opacity: 1;
    transform: translateY(0);
  }
}