@import url('https://fonts.googleapis.com/css2?family=Montserrat:ital,wght@0,100..900;1,100..900&display=swap');

/* ===== Variables ===== */
:root {
  --blue-deep:    #05102a;
  --blue-mid:     #0a1f5c;
  --blue-accent:  #1a4fc4;
  --blue-vivid:   #3b82f6;
  --blue-glow:    rgba(59, 130, 246, 0.35);
  --glass-bg:     rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.14);
  --glass-hover:  rgba(255, 255, 255, 0.11);
  --text:         #e8edf8;
  --text-muted:   rgba(200, 215, 245, 0.6);
  --blur:         blur(18px);
  --blur-heavy:   blur(28px);
  --radius-lg:    20px;
  --radius-xl:    30px;
  --font:         "Montserrat", sans-serif;
}

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

body {
  font-family: var(--font);
  color: var(--text);
  height: 100dvh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background-color: var(--blue-deep);
  background-image:
    radial-gradient(ellipse 80% 60% at 20% 10%,  rgba(26, 79, 196, 0.45) 0%, transparent 65%),
    radial-gradient(ellipse 60% 50% at 80% 80%,  rgba(59, 130, 246, 0.28) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 50% 50%,  rgba(5, 16, 42, 0.9)    0%, transparent 100%);
}

/* ambient animated orbs */
body::before {
  content: '';
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background:
    radial-gradient(ellipse 40% 35% at 15% 85%, rgba(59,130,246,0.16) 0%, transparent 70%),
    radial-gradient(ellipse 30% 25% at 85% 15%, rgba(26,79,196,0.20)  0%, transparent 70%);
  animation: ambientPulse 9s ease-in-out infinite alternate;
}
@keyframes ambientPulse {
  from { opacity: 0.5; }
  to   { opacity: 1; }
}

/* ===== Typography ===== */
.montserrat_title { font-family: var(--font); font-weight: 700; letter-spacing: 0.4px; }
.montserrat       { font-family: var(--font); letter-spacing: -0.3px; line-height: 1.6; }

/* ===== Scrollbars ===== */
* { scrollbar-width: thin; scrollbar-color: rgba(59,130,246,0.4) transparent; }
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(59,130,246,0.4); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: rgba(59,130,246,0.65); }

/* ===== Layout ===== */
.container-fluid { height: 100dvh; position: relative; z-index: 1; }
.row { height: 100%; }

/* ===== Sidebar ===== */
#history-container {
  background: linear-gradient(160deg, rgba(10,31,92,0.72) 0%, rgba(5,16,42,0.82) 100%);
  backdrop-filter: var(--blur-heavy);
  -webkit-backdrop-filter: var(--blur-heavy);
  border-right: 1px solid var(--glass-border);
  box-shadow: 4px 0 40px rgba(0,0,0,0.45), inset -1px 0 0 rgba(255,255,255,0.06);
  padding: 24px 12px 24px 18px;
  height: 100vh;
  overflow-y: auto;
  color: var(--text);
  position: absolute;
  top: 0; left: 0;
  z-index: 1000;
  transition: transform 0.45s cubic-bezier(0.19, 1, 0.22, 1);
  will-change: transform;
}

#new-chat-btn {
  background: var(--glass-bg) !important;
  border: 1px solid var(--glass-border) !important;
  color: var(--text) !important;
  border-radius: var(--radius-lg) !important;
  padding: 10px 16px !important;
  font-weight: 500;
  font-size: 0.875rem;
  transition: all 0.25s ease;
}
#new-chat-btn:hover:not(:disabled) {
  background: var(--glass-hover) !important;
  border-color: rgba(59,130,246,0.5) !important;
  box-shadow: 0 0 18px var(--blue-glow);
}
#new-chat-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ===== Home button in sidebar ===== */
.btn-outline-light.text-white {
  background: var(--glass-bg) !important;
  border: 1px solid rgba(255,255,255,0.2) !important;
  color: var(--text) !important;
  border-radius: var(--radius-lg) !important;
  padding: 10px 16px !important;
  font-weight: 500;
  font-size: 0.875rem;
  transition: all 0.25s ease;
  text-decoration: none;
}
.btn-outline-light.text-white:hover {
  background: linear-gradient(135deg, rgba(26,79,196,0.55), rgba(59,130,246,0.45)) !important;
  border-color: rgba(59,130,246,0.6) !important;
  color: #fff !important;
  box-shadow: 0 0 20px rgba(59,130,246,0.35), inset 0 1px 0 rgba(255,255,255,0.15) !important;
  transform: translateY(-1px);
}

.history-item {
  cursor: pointer;
  padding: 9px 12px;
  border-radius: 12px;
  color: var(--text);
  font-size: 0.82rem;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}
.history-item:hover {
  background: var(--glass-hover);
  border-color: var(--glass-border);
  box-shadow: 0 2px 10px rgba(59,130,246,0.12);
}
.history-item .btn {
  background: transparent;
  color: var(--text-muted);
  border: none;
  padding: 2px 6px;
  font-size: 0.75rem;
  border-radius: 6px;
  transition: all 0.2s ease;
}
.history-item .btn:hover { color: #ef4444; background: rgba(239,68,68,0.15); }

/* open sidebar icon */
.openSidebar {
  cursor: pointer;
  font-size: 26px;
  color: var(--text-muted);
  position: absolute;
  top: 18px; left: 16px;
  z-index: 900;
  transition: color 0.2s ease;
}
.openSidebar:hover { color: var(--text); }

/* ===== Chat Container ===== */
#chat-container {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  overflow: hidden;
  padding: 20px 24px;
  max-width: 760px;
  margin: 0 auto;
  transition: all 0.35s ease;
  position: relative;
  z-index: 1;
}
@media (max-width: 767px) {
  #chat-container { max-width: 100%; padding: 14px; }
}

/* ===== Login Button ===== */
#login-button {
  position: absolute;
  top: 18px; right: 20px;
  z-index: 999;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex; align-items: center; justify-content: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border) !important;
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-radius: 99px !important;
  padding: 8px 20px !important;
  color: var(--text) !important;
  font-size: 0.85rem;
  font-weight: 600;
  min-width: 110px;
  height: 40px;
  box-shadow: 0 2px 16px rgba(59,130,246,0.18), inset 0 1px 0 rgba(255,255,255,0.12);
}
#login-button:hover {
  background: var(--glass-hover) !important;
  border-color: rgba(59,130,246,0.55) !important;
  box-shadow: 0 0 24px var(--blue-glow), inset 0 1px 0 rgba(255,255,255,0.15) !important;
  transform: translateY(-1px);
}
#login-button.logged-in {
  background: transparent !important;
  border: none !important;
  border-radius: 50% !important;
  padding: 0 !important;
  box-shadow: none !important;
  min-width: 46px; width: 46px; height: 46px;
}
#login-button.logged-in:hover { transform: scale(1.08); }
#login-button.logged-in .profile-picture {
  width: 46px; height: 46px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(59,130,246,0.6);
  box-shadow: 0 0 14px var(--blue-glow);
}

/* ===== Response Area ===== */
#response {
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  padding: 12px 6px;
  color: var(--text);
}

/* ===== Chat Bubbles ===== */
.response-container { display: flex; margin-bottom: 12px; }
.user-container  { justify-content: flex-end; }
.bot-container   { justify-content: flex-start; }

.response-item {
  padding: 13px 18px;
  max-width: 78%;
  word-wrap: break-word;
  font-size: 0.9rem;
  line-height: 1.6;
  animation: bubbleIn 0.3s ease;
}

.user-message {
  background: linear-gradient(135deg, rgba(26,79,196,0.65) 0%, rgba(10,31,92,0.82) 100%);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(59,130,246,0.35);
  border-radius: 18px 18px 4px 18px;
  color: #dbeafe;
  box-shadow: 0 4px 20px rgba(26,79,196,0.22), inset 0 1px 0 rgba(255,255,255,0.12);
  margin-left: auto;
}

.bot-message {
  background: var(--glass-bg);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  border-radius: 18px 18px 18px 4px;
  color: var(--text);
  box-shadow: 0 4px 20px rgba(0,0,0,0.18), inset 0 1px 0 rgba(255,255,255,0.08);
}

@keyframes bubbleIn {
  from { opacity: 0; transform: translateY(12px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0)    scale(1); }
}

.bot-message p   { margin-bottom: 8px; }
.bot-message ul,
.bot-message ol  { padding-left: 18px; }
.bot-message a   { color: var(--blue-vivid); text-decoration: underline; }
.bot-message code {
  background: rgba(59,130,246,0.18);
  border-radius: 5px;
  padding: 1px 5px;
  font-size: 0.83em;
}

/* ===== Thinking Animation ===== */
.thinking-animation {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 6px 0;
}
.thinking-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: rgba(147,197,253,0.7);
  text-transform: uppercase;
  animation: thinkingLabelPulse 1.8s ease-in-out infinite;
}
@keyframes thinkingLabelPulse {
  0%, 100% { opacity: 0.5; }
  50%       { opacity: 1; }
}
.thinking-dots-row {
  display: flex;
  gap: 7px;
  align-items: center;
}
.thinking-bubble {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6, #93c5fd);
  box-shadow: 0 0 8px rgba(59,130,246,0.6);
  animation: thinkingBounce 1.3s ease-in-out infinite;
}
.thinking-bubble:nth-child(2) { animation-delay: 0.18s; }
.thinking-bubble:nth-child(3) { animation-delay: 0.36s; }
@keyframes thinkingBounce {
  0%, 70%, 100% { transform: translateY(0) scale(1);    opacity: 0.45; box-shadow: 0 0 6px rgba(59,130,246,0.4); }
  35%           { transform: translateY(-10px) scale(1.15); opacity: 1;    box-shadow: 0 0 16px rgba(59,130,246,0.9); }
}

/* ===== Input Area ===== */
.chat-input-box {
  position: relative;
  margin-top: 10px;
  background: rgba(255,255,255,0.06);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 12px 54px 12px 18px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 4px 20px rgba(0,0,0,0.18);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.chat-input-box:focus-within {
  border-color: rgba(59,130,246,0.6);
  box-shadow: 0 0 0 2px rgba(59,130,246,0.22), 0 4px 24px var(--blue-glow);
}

#userInput {
  resize: none;
  overflow-y: hidden;
  min-height: 24px;
  max-height: 160px;
  background: transparent !important;
  border: none !important;
  outline: none !important;
  box-shadow: none !important;
  color: var(--text) !important;
  font-family: var(--font);
  font-size: 0.9rem;
  line-height: 1.55;
  width: 100%;
  padding: 0 !important;
  display: block;
}
#userInput::placeholder { color: var(--text-muted); }

#btn-send {
  position: absolute;
  right: 9px;
  bottom: 8px;
  top: auto;
  transform: none;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(26,79,196,0.85), rgba(59,130,246,0.72));
  border: 1px solid rgba(59,130,246,0.45);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 12px rgba(59,130,246,0.28);
}
#btn-send:hover:not(:disabled) {
  background: linear-gradient(135deg, rgba(26,79,196,1), rgba(59,130,246,0.95));
  box-shadow: 0 0 20px var(--blue-glow);
  transform: scale(1.06);
}
#btn-send:disabled { opacity: 0.4; cursor: not-allowed; }

/* ===== Welcome Card ===== */
#welcome-message, .welcome-container {
  padding: 36px 32px;
  margin: 24px 0;
  border-radius: var(--radius-xl);
  background: linear-gradient(145deg, rgba(10,31,92,0.55) 0%, rgba(5,16,42,0.65) 100%);
  backdrop-filter: var(--blur-heavy);
  -webkit-backdrop-filter: var(--blur-heavy);
  border: 1px solid var(--glass-border);
  box-shadow:
    0 8px 40px rgba(0,0,0,0.38),
    0 0 0 1px rgba(255,255,255,0.04),
    inset 0 1px 0 rgba(255,255,255,0.1);
  animation: fadeUp 0.7s ease;
  position: relative;
  overflow: hidden;
}
/* top shimmer line */
#welcome-message::before, .welcome-container::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.28) 50%, transparent 100%);
}

.welcome-header { text-align: center; margin-bottom: 18px; }
.welcome-header h3 {
  font-size: 1.7rem;
  font-weight: 700;
  background: linear-gradient(135deg, #e0eaff 0%, #93c5fd 60%, #60a5fa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.welcome-content { margin-bottom: 20px; }
.welcome-content p {
  font-size: 1rem; line-height: 1.7;
  color: rgba(200,215,255,0.85);
  text-align: center;
}

.welcome-suggestions { margin-top: 28px; }
.welcome-suggestions > p {
  font-weight: 500; font-size: 0.9rem;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 16px;
}

.suggestion-buttons { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.suggestion-btn {
  background: var(--glass-bg);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border) !important;
  border-radius: 99px;
  padding: 10px 22px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: 0 2px 12px rgba(0,0,0,0.18), inset 0 1px 0 rgba(255,255,255,0.1);
}
.suggestion-btn:hover {
  background: linear-gradient(135deg, rgba(26,79,196,0.45), rgba(59,130,246,0.3));
  border-color: rgba(59,130,246,0.5) !important;
  box-shadow: 0 0 20px var(--blue-glow), inset 0 1px 0 rgba(255,255,255,0.15);
  transform: translateY(-2px);
  color: #dbeafe;
}

/* ===== Modal ===== */
.modal-content {
  background: linear-gradient(160deg, rgba(10,31,92,0.88) 0%, rgba(5,16,42,0.93) 100%);
  backdrop-filter: var(--blur-heavy);
  -webkit-backdrop-filter: var(--blur-heavy);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: 0 24px 80px rgba(0,0,0,0.58), 0 0 0 1px rgba(255,255,255,0.05);
  overflow: hidden;
  position: relative;
}
.modal-content::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent 10%, rgba(255,255,255,0.25) 50%, transparent 90%);
}
.modal { z-index: 1050; }
.modal-backdrop { z-index: 1049; }
.modal-header { border-bottom: 1px solid rgba(255,255,255,0.08); padding: 1.4rem 1.6rem; }
.modal-body { padding: 2rem 1.6rem; }
.modal-title { color: var(--text); font-weight: 700; }
.modal-body p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 1.5rem; }

/* ===== Dropdown ===== */
.dropdown-menu {
  background: linear-gradient(160deg, rgba(10,31,92,0.90) 0%, rgba(5,16,42,0.95) 100%);
  backdrop-filter: var(--blur-heavy);
  -webkit-backdrop-filter: var(--blur-heavy);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 10px;
  margin-top: 10px;
  box-shadow: 0 16px 50px rgba(0,0,0,0.5);
}
.dropdown-item {
  color: var(--text); padding: 9px 14px;
  display: flex; align-items: center; gap: 10px;
  border-radius: 10px; font-size: 0.87rem;
  transition: all 0.2s ease;
}
.dropdown-item:hover { background: var(--glass-hover); color: #93c5fd; }
.dropdown-divider { border-top: 1px solid rgba(255,255,255,0.1); margin: 6px 0; }

/* ===== Blur Overlay ===== */
.blur-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 999;
  display: none;
  transition: opacity 0.3s ease;
}

/* ===== Mobile ===== */
@media (max-width: 767.98px) {
  #history-container { transform: translateX(-100%); top: 0; width: 82%; }
  #history-container.show { transform: translateX(0); }
  .blur-overlay { display: none; }
  body.sidebar-open .blur-overlay { display: block; }
  .mobile-sidebar-btn {
    display: block !important;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border-radius: 12px;
    color: var(--text);
    padding: 6px 10px;
    font-size: 1.3rem;
  }
  .openSidebar { display: none; }
  .welcome-suggestions { margin-top: 0; }
  .suggestion-buttons { flex-direction: column; }
  #welcome-message, .welcome-container { padding: 22px 18px; }
  .welcome-header h3 { font-size: 1.35rem; }
  .modal-dialog { margin: 1.75rem auto; max-width: 90%; }
  .modal-body { padding: 1.5rem; }
}

@media (min-width: 768px) {
  #history-container { position: relative; width: 300px; }
  .blur-overlay { display: none !important; }
  .mobile-sidebar-btn { display: none; }
}

/* ===== Misc Buttons ===== */
button { background: var(--glass-bg); color: var(--text); border: none; transition: background 0.25s ease; }
button:hover { background: var(--glass-hover); }
.btn-danger { background: rgba(220,53,69,0.7) !important; }
.btn-danger:hover { background: rgba(167,29,42,0.85) !important; color: white; }
.btn-outline-secondary { border: 1px solid var(--glass-border) !important; color: var(--text) !important; }
.btn-outline-secondary:hover { background: var(--glass-hover) !important; border-color: rgba(59,130,246,0.4) !important; }

/* ===== Animations ===== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

p { margin: 0; }