/* ===== CSS VARIABLES ===== */
:root {
  /* Color Palette */
  --color-body-bg: #1e2934;
  --color-side-menu-bg: #1e2934;
  --color-dashboard-bg: #131a20;
  --color-white: #ffffff;
  --color-green: #aeea00;

  /* Derived Colors */
  --color-white-10: rgba(255, 255, 255, 0.1);
  --color-white-20: rgba(255, 255, 255, 0.2);
  --color-white-30: rgba(255, 255, 255, 0.3);
  --color-white-60: rgba(255, 255, 255, 0.6);
  --color-white-70: rgba(255, 255, 255, 0.7);
  --color-green-10: rgba(174, 234, 0, 0.1);
  --color-green-15: rgba(174, 234, 0, 0.15);
  --color-green-20: rgba(174, 234, 0, 0.2);
  --color-green-25: rgba(174, 234, 0, 0.25);
  --color-green-40: rgba(174, 234, 0, 0.4);
  --color-black-70: rgba(0, 0, 0, 0.7);

  /* Layout Variables */
  --side-menu-width-collapsed: 80px;
  --side-menu-width-expanded: 300px;
  --dashboard-padding: 20px;
  --border-radius-sm: 8px;
  --border-radius-md: 15px;
  --border-radius-lg: 20px;

  /* Animation Variables */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== FONT FACES ===== */

@font-face {
  font-family: "Pretendard";
  src: url("../fonts/pretendard/PretendardVariable.ttf") format("truetype");
  font-weight: 100 900;
  font-style: normal;
}

@font-face {
  font-family: "Publica Sans";
  src: url("../fonts/Publica.otf") format("opentype");
  font-weight: 400;
  font-style: normal;
}

/* ===== IBM PLEX SANS FONT FAMILY ===== */
@font-face {
  font-family: 'IBM Plex Sans';
  src: url('../fonts/IBM-plex/IBMPlexSans-Light.ttf') format('truetype');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'IBM Plex Sans';
  src: url('../fonts/IBM-plex/IBMPlexSans-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'IBM Plex Sans';
  src: url('../fonts/IBM-plex/IBMPlexSans-Medium.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* ===== BASE STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  height: 100%;
  height: 100vh;
  height: 100dvh; /* Dynamic viewport height for mobile */
}

body {
  font-family: "Pretendard", Arial, sans-serif;
  background-color: var(--color-body-bg);
  color: var(--color-white);
  overflow-x: hidden;
  letter-spacing: 0.01em;
  height: 100vh;
  height: 100dvh; /* Dynamic viewport height for mobile */
  overflow: hidden;
}

/* ===== MAIN LAYOUT ===== */
.main-container {
  display: flex;
  height: 100vh;
  height: 100dvh; /* Dynamic viewport height for mobile */
  width: 100vw;
}

/* ===== SIDE MENU (LEFT SIDEBAR) ===== */
.side-menu {
  width: var(--side-menu-width-collapsed);
  min-width: var(--side-menu-width-collapsed);
  background-color: var(--color-side-menu-bg);
  transition: width var(--transition-medium);
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 1000;
  overflow: hidden;
}

.side-menu.expanded {
  width: var(--side-menu-width-expanded);
  min-width: var(--side-menu-width-expanded);
  backdrop-filter: blur(50px);
  border-right: 1px rgba(171, 213, 255, 0.124) solid;
}

/* ===== SIDE MENU COLLAPSED STATE ===== */
.menu-collapsed {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 0;
  height: 100%;
  transition: opacity var(--transition-medium);
}

.side-menu.expanded .menu-collapsed {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.menu-expand-btn {
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  color: var(--color-white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  transition: transform 0.2s ease;
}

.menu-expand-btn svg {
  padding: 4.5px;
  width: 100%;
  height: 100%;
}

.menu-expand-btn svg line {
  stroke: var(--color-white);
  stroke-width: 1;
}

.menu-expand-btn svg:hover line {
  stroke-width: 1.6;
}

.menu-add-chat-btn {
  width: 40px;
  height: 40px;
  background: var(--color-white-10);
  border: none;
  border-radius: var(--border-radius-sm);
  color: var(--color-white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 30px;
  transition: all var(--transition-fast);
}

.menu-add-chat-btn:hover {
  background: var(--color-white-20);
  transform: translateY(-1px);
}

.menu-nav-icons {
  display: flex;
  flex-direction: column;
  gap: 20px;
  flex: 1;
}

.menu-nav-icons-bottom {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: auto;
  padding-bottom: 20px;
}

.nav-icon-btn {
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  color: var(--color-white-70);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
}

.nav-icon-btn:hover {
  background: var(--color-white-10);
  color: var(--color-white);
}

.nav-icon-btn.active {
  background: var(--color-green-15);
  color: var(--color-green);
}

/* ===== SIDE MENU EXPANDED STATE ===== */
.menu-expanded {
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-20px);
  transition: opacity var(--transition-medium), visibility var(--transition-medium), transform var(--transition-medium);
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  backdrop-filter: blur(50px);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.side-menu.expanded .menu-expanded {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
  transition-delay: 0.1s;
}

/* ===== MENU HEADER - FIXED ===== */
.menu-header {
  position: relative;
  z-index: 10;
  backdrop-filter: blur(20px);
  padding: 24px 20px 16px 20px;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
  flex-shrink: 0;
}

.menu-brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 20px;
  padding: 8px 0;
}

.brand-main {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-chevron {
  display: flex;
  align-items: center;
  margin-left: 12px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.brand-chevron:hover {
  transform: scale(1.1);
}

/* Desktop and tablet - larger chevron */
@media (min-width: 769px) {
  .brand-chevron svg {
    width: 28px !important;
    height: 28px !important;
  }
}

.brand-logo {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: opacity 0.2s;
}

.brand-logo:hover {
  opacity: 0.8;
}

.brand-name {
  font-size: 1rem;
  font-weight: lighter;
  color: #ffffff;
  font-family: "Publica Sans", Arial, sans-serif;
  cursor: pointer;
  transition: opacity 0.2s;
}

.brand-name:hover {
  opacity: 0.8;
}

.new-chat-btn {
  width: 100%;
  background: linear-gradient(135deg, rgba(174, 234, 0, 0.15) 0%, rgba(174, 234, 0, 0.08) 100%);
  border: 1px solid rgba(174, 234, 0, 0.2);
  border-radius: 12px;
  padding: 14px 16px;
  color: #aeea00;
  font-family: "Pretendard", Arial, sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.new-chat-btn:hover {
  background: linear-gradient(135deg, rgba(174, 234, 0, 0.25) 0%, rgba(174, 234, 0, 0.15) 100%);
  border-color: rgba(174, 234, 0, 0.4);
  transform: translateY(-1px);
}

.menu-close-btn {
  width: 32px;
  height: 32px;
  background: var(--color-white-10);
  border: none;
  border-radius: 50%;
  color: var(--color-white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.menu-close-btn:hover {
  background: var(--color-white-20);
  transform: scale(1.1);
}

/* ===== MENU BODY - SCROLLABLE CHAT HISTORY WITH FADE OVERLAYS ===== */
.menu-body {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0;
  scrollbar-width: none;
  -ms-overflow-style: none;
  position: relative;
  background: #1117215f;
}

.menu-body::-webkit-scrollbar {
  display: none;
}

/* ===== CLEAN CHAT HISTORY SECTION WITHOUT BACKGROUND ===== */
.chat-history-section {
  padding: 20px 20px 0px 20px;
}

.history-group {
  margin-bottom: 32px;
}

.history-group-title {
  font-size: 0.75rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
  padding: 0 4px;
}

.chat-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  pointer-events: auto;
  user-select: none;
}

.chat-item:hover,
.chat-item:active,
.chat-item:focus {
  background: rgba(174, 234, 0, 0.05);
  border-color: rgba(174, 234, 0, 0.15);
  transform: translateX(4px);
}

.chat-item {
  outline: none !important;
}

.chat-item-title {
  font-size: 0.9rem;
  font-weight: 500;
  color: #ffffff;
  margin-bottom: 6px;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.chat-item-preview {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.chat-item-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 10px;
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.4);
}

.chat-item-time {
  font-weight: 400;
}

.chat-item-type {
  background: rgba(174, 234, 0, 0.15);
  color: #aeea00;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 500;
}

/* ===== MENU FOOTER - FIXED ===== */
.menu-footer {
  position: relative;
  z-index: 10;
  backdrop-filter: blur(20px);
  padding: 16px 20px 24px 20px;
  box-shadow: 0 -2px 20px rgba(0, 0, 0, 0.1);
  flex-shrink: 0;
}

.menu-section {
  margin-bottom: 30px;
  padding: 0 20px;
}

.menu-section-title {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-white-70);
  margin-bottom: 15px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--border-radius-sm);
  color: var(--color-white);
  text-decoration: none;
  transition: all var(--transition-fast);
  margin-bottom: 8px;
  cursor: pointer;
}

.menu-item:hover {
  background: var(--color-white-10);
}

.menu-item.active {
  background: var(--color-green-15);
  color: var(--color-green);
}

.menu-item-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.menu-item-text {
  font-size: 0.9rem;
  font-weight: 400;
}

.menu-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.menu-action-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 8px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
  font-weight: 400;
}

.menu-action-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: #ffffff;
  transform: translateX(2px);
}

.menu-action-icon {
  width: 20px;
  height: 20px;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.menu-action-item:hover .menu-action-icon {
  opacity: 1;
}

.menu-action-text {
  flex: 1;
}

.menu-quick-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  padding: .6rem 1rem;
}

.quick-action-icon {
  width: 22px;
  height: 22px;
  display: block;
  filter: brightness(0) invert(1);
  transition: filter 0.2s;
}

.quick-action-icon.active {
  filter: brightness(0) saturate(100%) invert(77%) sepia(61%) saturate(355%) hue-rotate(38deg) brightness(102%)
    contrast(101%);
}

/* ===== MOBILE MENU BUTTON ===== */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--color-white);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  margin-right: 12px;
}

.mobile-menu-btn svg {
  width: 2.2rem;
  height: 2.2rem;
  stroke-width: 1;
}

/* ===== MOBILE MENU OVERLAY ===== */
.mobile-menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.406);
  backdrop-filter: blur(3px);
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-medium);
}

.mobile-menu-overlay.show {
  opacity: 1;
  visibility: visible;
}

.mobile-menu {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 80%;
  background: linear-gradient(135deg, 
    rgba(25, 35, 45, 0.95) 0%, 
    rgba(30, 42, 55, 0.92) 25%, 
    rgba(35, 48, 62, 0.89) 50%, 
    rgba(37, 74, 85, 0.86) 75%, 
    rgba(30, 99, 81, 0.83) 100%
  );
  backdrop-filter: blur(100px);
  border-right: 1px rgba(171, 213, 255, 0.124) solid;
  transform: translateX(-100%);
  transition: transform var(--transition-medium);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 2px 0 20px rgba(0, 0, 0, 0.3);
}

.mobile-menu-overlay.show .mobile-menu {
  transform: translateX(0);
}

/* ===== DASHBOARD SECTION (RIGHT) ===== */
.dashboard {
  flex: 1;
  background-color: var(--color-body-bg);
  margin: var(--dashboard-padding);
  transition: margin-left var(--transition-medium);
  overflow: hidden;
}

/* ===== DASHBOARD SECTION (RIGHT) ===== */
.dashboard-inner {
  width: 100%;
  height: 100%;
  background: #131a20;
  background-image: radial-gradient(circle at 1px 1px, rgba(255, 255, 255, 0.061) 1px, transparent 0);
  background-size: 25px 25px;
  border-radius: var(--border-radius-md);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  position: relative;
}


/* ===== NAVBAR ===== */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 3rem 0rem 4rem;
  background-color: var(--color-dashboard-bg);
}

.navbar-left {
  display: flex;
  align-items: center;
}

.brand-logo {
  font-size: 1.2rem;
  font-weight: 200;
  color: var(--color-white);
  letter-spacing: 0.3px;
  font-family: "Publica Sans", Arial, sans-serif;
}

.brand-ai {
  color: var(--color-green);
}

.navbar-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.auth-button {
  background: var(--color-white-10);
  border: none;
  color: var(--color-white);
  cursor: pointer;
  padding: 0.8rem 1.8rem;
  border-radius: 0.2rem;
  transition: all var(--transition-fast);
  font-family: "Pretendard", Arial, sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
}

.auth-button:hover {
  background: var(--color-white-20);
  transform: translateY(-1px);
}

.sign-up-btn {
  background: var(--color-green);
  color: var(--color-dashboard-bg);
  border: none;
}

.sign-up-btn:hover {
  background: #9ed600;
  border-color: #9ed600;
}

/* ===== DASHBOARD CONTENT ===== */
.dashboard-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  position: relative;
  overflow: hidden;
}

/* ===== ANIMATED BACKGROUND ===== */
.glow-effect {
  position: absolute;
  top: 40%;
  left: 60%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--color-green-15) 0%, rgba(191, 255, 0, 0.111) 40%, transparent 70%);
  border-radius: 50%;
  filter: blur(60px);
  animation: glowWander 8s ease-in-out infinite;
  z-index: 2;
}

@keyframes glowWander {
  0%,
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.6;
  }
  25% {
    transform: translate(-45%, -55%) scale(1.1);
    opacity: 0.8;
  }
  50% {
    transform: translate(-55%, -45%) scale(0.9);
    opacity: 0.6;
  }
  75% {
    transform: translate(-48%, -52%) scale(1.05);
    opacity: 0.9;
  }
}

/* ===== HERO SECTION ===== */
.hero-section {
  text-align: center;
  margin-bottom: 3rem;
  z-index: 2;
  position: relative;
}

.hero-title {
  font-size: 2rem;
  color: var(--color-white);
  font-family: "Publica Sans", Arial, sans-serif;
  text-align: center;
  margin-bottom: .85rem;
  line-height: 1.2;
  font-weight: lighter;
}

.storyline-green {
  color: var(--color-green);
}

.hero-subtitle {
  font-size: 1.1rem;
  font-weight: 200;
  font-family: "Pretendard", Arial, sans-serif;
  color: var(--color-green);
  line-height: 1;
  margin: 0 auto;
  text-align: center;
  min-height: 1.5rem;
  max-width: 400px;
  width: 100%;
}

#typing-text {
  font-size: 1.1rem;
  color: #ffffff;
  font-weight: 200;
  letter-spacing: 0.02em;
}

.typing-cursor {
  color: var(--color-green);
  animation: blink 1s infinite;
  font-weight: 900;
}

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}

/* ===== CHAT INPUT SECTION ===== */
.chat-input-section {
  width: 100%;
  max-width: 600px;
  margin-bottom: 2rem;
  z-index: 2;
  position: relative;
}

.chat-input-container {
  background: rgba(255, 255, 255, 0.022);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius-md);
  padding: 1.2rem 1.2rem .5rem 1.2rem;
  border: 1px solid var(--color-white-10);
  transition: background 0.2s, border-color 0.2s;
}

.chat-input-container:focus-within {
  background: rgba(16, 22, 28, 0.35);
}

/* Disable browser autocomplete suggestions */
.chat-input-container input,
.chat-input-container textarea {
  -webkit-autocomplete: none;
  -moz-autocomplete: none;
  -ms-autocomplete: none;
  autocomplete: none;
}

/* Disable autofill styling */
.chat-input-container input:-webkit-autofill,
.chat-input-container input:-webkit-autofill:hover,
.chat-input-container input:-webkit-autofill:focus,
.chat-input-container input:-webkit-autofill:active {
  -webkit-box-shadow: 0 0 0 30px transparent inset !important;
  -webkit-text-fill-color: inherit !important;
  transition: background-color 5000s ease-in-out 0s;
}

.tags-group {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: .8rem;
}

.tags-scroll-container {
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.tags-scroll-container::-webkit-scrollbar {
  display: none;
}

.tags-list {
  display: flex;
  gap: 8px;
  padding-right: 8px;
}

.tag {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: var(--border-radius-sm);
  font-size: 0.8rem;
  white-space: nowrap;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--color-green-15);
  color: var(--color-green);
  border: 1px solid var(--color-green-20);
}

.tag:hover {
  background: var(--color-green-25);
}

.more-tag {
  background: var(--color-green-15);
  color: var(--color-green);
  padding: 6px 16px;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  border: 1px solid var(--color-green-20);
}

.more-tag:hover {
  background: var(--color-green-25);
  transform: scale(1.05);
}

.input-group {
  width: 100%;
  margin-bottom: 1rem;

}

.chat-input {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--color-white-30);
  outline: none;
  color: var(--color-white);
  font-size: 1.2rem;
  padding: 15px 0;
  font-family: "Pretendard", Arial, sans-serif;
  font-weight: 400;
  transition: padding-left 0.18s cubic-bezier(0.4, 0, 0.2, 1);
}

.chat-input::placeholder {
  font-size: 1rem;
  color: var(--color-white-60);
  font-weight: 200;
}

.chat-input:focus {
  border-bottom-color: var(--color-green);
}

.chat-input:not(:placeholder-shown) {
  padding-left: 12px;
}

.icons-group {
  display: flex;
  justify-content: space-between;
  align-items: center;

}

.left-icons {
  display: flex;
  gap: 12px;

}

.right-icons {
  display: flex;

}

.icon-btn {
  background: none;
  border: none;
  color: var(--color-white-70);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-btn:hover {
  background: var(--color-white-10);
  color: var(--color-white);
}

.send-btn {
  color: var(--color-green);
}

.send-btn:hover {
  background: var(--color-green-10);
}

/* ===== CARDS SECTION ===== */
.cards-section {
  width: 100%;
  max-width: 600px;
  z-index: 2;
  position: relative;
}

.cards-container {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  -webkit-overflow-scrolling: touch;
  padding: 16px 0;
}

.cards-container::-webkit-scrollbar {
  display: none;
}

.card {
  flex-shrink: 0;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--color-white-10);
  background-color: rgba(255, 255, 255, 0.042);
  border-radius: 10px;
  padding: 12px 20px;
  min-width: 200px;
  cursor: pointer;
  transition: all var(--transition-fast);
  backdrop-filter: blur(10px);
}

.card:hover {
  background: var(--color-white-20);
  transform: translateY(-2px);
  border-color: var(--color-green-30);
}

.card-icon {
  width: 16px;
  height: 16px;
  filter: brightness(0) invert(1);
}

.cards-title {
  text-align: center;
  color: var(--color-white);
  font-size: 1rem;
  font-weight: 200;
  margin-bottom: 0.5rem;
  letter-spacing: 0.01em;
}

.card-text {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--color-white);
  font-family: "Pretendard", Arial, sans-serif;
  white-space: nowrap;
}

.fade-out-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;
}

.fade-left {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 40px;
  background: linear-gradient(to right, var(--color-dashboard-bg), transparent);
}

.fade-right {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 40px;
  background: linear-gradient(to left, var(--color-dashboard-bg), transparent);
}

/* ===== TAGS POPUP ===== */
.tags-popup-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-black-70);
  backdrop-filter: blur(8px);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-medium);
  padding: 24px;
}

.tags-popup-overlay.show {
  opacity: 1;
  visibility: visible;
}

.tags-popup {
  background: rgba(16, 22, 28, 0.95);
  backdrop-filter: blur(20px);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-white-10);
  width: 100%;
  max-width: 400px;
  max-height: 340px;
  margin: 0 auto;
  overflow: hidden;
  transform: scale(0.9) translateY(20px);
  transition: all var(--transition-medium);
  box-sizing: border-box;
}

.tags-popup-overlay.show .tags-popup {
  transform: scale(1) translateY(0);
}

.tags-popup-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px 10px 18px;
  border-bottom: 1px solid var(--color-white-10);
}

.tags-popup-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-white);
  margin: 0;
}

.tags-popup-close {
  background: none;
  border: none;
  color: var(--color-white);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tags-popup-close:hover {
  background: var(--color-white-10);
  transform: scale(1.1);
}

.tags-popup-content {
  padding: 12px 18px 16px 18px;
  overflow-y: auto;
  max-height: 220px;
}

.tags-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
}

.popup-tag {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  border-radius: 16px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  text-align: center;
  min-height: 44px;
}

.popup-tag.selected {
  background: var(--color-green-15);
  color: var(--color-green);
  border: 1px solid var(--color-green-40);
  transform: scale(1.02);
}

.popup-tag:not(.selected) {
  background: var(--color-white-10);
  color: var(--color-white);
  border: 1px solid var(--color-white-10);
}

.popup-tag:not(.selected):hover {
  background: var(--color-white-20);
  transform: scale(1.02);
  border: 1px solid var(--color-white-20);
}

.popup-tag.selected:hover {
  background: var(--color-green-20);
  transform: scale(1.05);
}

/* ===== MOBILE RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
  :root {
    --dashboard-padding: 0px;
  }

  .main-container {
    flex-direction: row;
  }

  /* Hide desktop side menu completely on mobile */
  .side-menu {
    display: none;
  }
  
  /* Show mobile menu button */
  .mobile-menu-btn {
    display: flex;
  }

  /* Show mobile menu overlay */
  .mobile-menu-overlay {
    display: block;
  }

  .dashboard {
    flex: 1;
    margin: var(--dashboard-padding);
    width: 100%;
  }

  .dashboard-inner {
    border-radius: 0;
    height: 100vh;
  }

  .navbar {
    position: fixed;
    top: env(safe-area-inset-top, 0);
    left: 0;
    right: 0;
    z-index: 1002;
    background-color: var(--color-dashboard-bg);
    padding-top: max(env(safe-area-inset-top, 0), 0.8rem);
    padding-bottom: 0.8rem;
  }

  .dashboard-content {
    display: flex;
    flex-direction: column;
    flex-direction: column-reverse;
    padding-top: calc(4.5rem + env(safe-area-inset-top, 0));
    padding-bottom: 0;
  }

  .navbar-left {
    display: flex;
    align-items: center;
    gap: 16px;
  }

  .brand-logo {
    font-size: 1.3rem;
  }

  .auth-button {
    padding: 0.6rem 1rem;
    font-size: 0.8rem;
  }

  .dashboard-content {
    padding: 1.5rem 1rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
    max-width: 300px;
  }

  .chat-input-container {
    padding: 1rem;
  }

  .chat-input {
    font-size: 1rem;
  }

  .glow-effect {
    width: 300px;
    height: 300px;
  }

  .card {
    min-width: 180px;
    padding: 10px 16px;
  }

  .card-text {
    font-size: 0.8rem;
  }

  .cards-section {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 26.5vh;
    width: 100vw;
    max-width: 100vw;
    background: transparent;
    z-index: 1001;
    margin: 0;
    border-radius: 0;
    box-shadow: none;
  }
  .cards-title {
    display: none;
  }
  .cards-container {
    padding-bottom: 0;
  }
  .brand-logo img,
  .brand-logo {
    width: 18px !important;
    height: 18px !important;
  }

  .tag,
  .more-tag {
    background: var(--color-green-15);
    color: var(--color-green);
    border: 1px solid var(--color-green-20);
    font-size: .85rem;
  }
  .card-text {
    font-size: .85rem;
    font-weight: 400;
  }

  .cards-section.hide-on-input {
    display: none !important;
  }

  /* HERO SECTION: absolutely centered and shifted up */
  .hero-section {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -60%);
    width: 100vw;
    z-index: 10;
    margin-bottom: 0;
    background: none;
    border: none !important;
    padding: 0 1rem;
  }

  /* CHAT INPUT SECTION: fixed to bottom, full width, white bg, top radius */
  .chat-input-section {
    position: fixed;
    left: 0;
    right: 0;
    bottom: env(safe-area-inset-bottom, 0);
    width: 100vw;
    max-width: 100vw;
    border-radius: 20px 20px 0 0;
    background: rgba(255, 255, 255, 0.028);
    z-index: 1002;
    box-shadow: 0 -2px 24px rgba(0, 0, 0, 0.08);
    margin: 0;
    padding-bottom:0;

  }
  .chat-input-container {
    background: none;
    border: none;
    box-shadow: none;
    padding: 1rem 1.2rem 1.2rem 0rem;
    margin:0;

  }

  .send-btn {
    color: var(--color-green);
  }
  .send-btn:hover {
    background: var(--color-green-10);
  }
  .tags-group {
    margin-bottom: .5rem;

  }
  .tag,
  .more-tag {
    background: var(--color-green-15);
    color: var(--color-green);
    border: 1px solid var(--color-green-20);
    font-size: .85rem;
  }
  .tag:hover,
  .more-tag:hover {
    background: var(--color-green-25);
  }
}

@media (max-width: 480px) {
  :root {
    --dashboard-padding: 0px;
  }

  .navbar {
    padding: 0.8rem 1rem;
  }

  .brand-logo {
    font-size: 1.1rem;
  }

  .auth-button {
    padding: 0.4rem 1rem;
    font-size: .8rem;
  }

  .hero-section {
    transform: translate(-50%, -120%);
  }
  .hero-title {
    font-size: 2rem;
  }
  .hero-subtitle {
    font-size: 1.1rem;
    max-width: 190px;
  }
  
  #typing-text {
    font-size: 1.1rem;
    letter-spacing: .1px;
    font-weight: 200;
  }
  .dashboard-content {
    padding: 1rem 0.8rem;
  }
  .chat-input-container {
    padding: 1.2rem;
  }
  .tag,
  .more-tag {
    font-size: .85rem;
    padding: 7px 16px;
  }
  .chat-input {
    border-radius: 0;
    font-size: 1.2rem;
  }

  .tags-popup {
    max-width: 90vw;
    margin: 0 20px;
  }

  .glow-effect {
    width: 250px;
    height: 250px;
    background: radial-gradient(
      circle,
      var(--color-green-25, rgba(191, 255, 0, 0.513)) 0%,
      rgba(191, 255, 0, 0.18) 40%,
      transparent 70%
    );
    filter: blur(40px);
  }
}