/* ===== CSS Variables ===== */
:root {
  --accent-color: rgb(38, 186, 216);
  --accent-hover: rgb(25, 150, 180);
  --accent-light: rgb(80, 205, 235);
  --background-gradient: linear-gradient(
    135deg,
    var(--accent-hover) 0%,
    var(--accent-color) 100%
  );
  --glass-bg: rgba(255, 255, 255, 0.95);
  --glass-border: rgba(255, 255, 255, 0.2);
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md:
    0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg:
    0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl:
    0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ===== Font Face Declarations ===== */
@font-face {
  font-family: "Intelo";
  src: url("../fonts/intelo-regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Intelo";
  src: url("../fonts/intelo-light.woff2") format("woff2");
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Intelo";
  src: url("../fonts/intelo-bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* ===== Reset & Base Styles ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family:
    "Intelo",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    Arial,
    sans-serif;
  background: var(--background-gradient);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  color: var(--text-primary);
  line-height: 1.6;
}

/* ===== App Container ===== */
.app-container {
  width: 100%;
  max-width: 900px;
  height: 90vh;
  max-height: 800px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--glass-border);
  animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Header ===== */
.chat-header {
  background: linear-gradient(
    135deg,
    var(--accent-hover) 0%,
    var(--accent-color) 100%
  );
  padding: 20px 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: var(--shadow-md);
  z-index: 10;
}

.header-content img {
  width: 200px;
}

/* ===== Main Content ===== */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
  scroll-behavior: smooth;
}

.chat-main::-webkit-scrollbar {
  width: 6px;
}

.chat-main::-webkit-scrollbar-track {
  background: transparent;
}

.chat-main::-webkit-scrollbar-thumb {
  background: var(--text-light);
  border-radius: 3px;
}

.chat-main::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* ===== Messages Container ===== */
.messages-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 24px;
  flex-shrink: 0;
}

/* ===== Message Styles ===== */
.message {
  max-width: 75%;
  padding: 14px 18px;
  border-radius: var(--border-radius-lg);
  font-size: 0.95rem;
  line-height: 1.6;
  animation: messageSlide 0.3s ease-out;
  word-wrap: break-word;
}

@keyframes messageSlide {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.sent {
  align-self: flex-end;
  background: linear-gradient(
    135deg,
    var(--accent-hover) 0%,
    var(--accent-color) 100%
  );
  color: white;
  border-bottom-right-radius: 4px;
  box-shadow: var(--shadow-md);
}

.sent a {
  color: white;
  text-decoration: underline;
}

.received {
  align-self: flex-start;
  background: white;
  color: var(--text-primary);
  border-bottom-left-radius: 4px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.received a {
  color: var(--accent-color);
  text-decoration: none;
}

.received a:hover {
  text-decoration: underline;
}

/* ===== Message Content Lists ===== */
.message ul,
.message ol {
  margin: 8px 0;
  padding-left: 20px;
}

.message ul {
  list-style-type: disc;
}

.message ol {
  list-style-type: decimal;
}

.message li {
  margin: 4px 0;
  line-height: 1.6;
}

.message li::marker {
  color: var(--accent-color);
}

/* Nested lists */
.message ul ul,
.message ol ol,
.message ul ol,
.message ol ul {
  margin: 4px 0;
}

/* ===== Footer ===== */
.chat-footer {
  background: white;
  padding: 20px 24px;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.05);
}

.input-wrapper {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  background: var(--background-gradient);
  padding: 6px;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--transition-normal);
}

.input-wrapper:focus-within {
  box-shadow: var(--shadow-lg);
}

.message-input {
  flex: 1;
  background: white;
  border: none;
  border-radius: var(--border-radius-md);
  padding: 14px 16px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text-primary);
  resize: none;
  outline: none;
  min-height: 50px;
  max-height: 150px;
  field-sizing: content;
  transition: box-shadow var(--transition-fast);
}

.message-input::placeholder {
  color: var(--text-light);
}

.message-input:focus {
  box-shadow: 0 0 0 3px rgba(38, 186, 216, 0.2);
}

.message-input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background: #f3f4f6;
}

.send-button {
  width: 50px;
  height: 50px;
  background: linear-gradient(
    135deg,
    var(--accent-hover) 0%,
    var(--accent-color) 100%
  );
  border: none;
  border-radius: var(--border-radius-md);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
  flex-shrink: 0;
}

.send-button:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.send-button:active {
  transform: scale(0.95);
}

.send-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.footer-hint {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-light);
  margin-top: 12px;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
  body {
    padding: 10px;
  }

  .app-container {
    height: 95vh;
    max-height: none;
    border-radius: var(--border-radius-lg);
  }

  .chat-header {
    padding: 16px 20px;
  }

  .chat-main {
    padding: 0;
  }

  .messages-container {
    padding: 16px;
    gap: 12px;
  }

  .message {
    max-width: 85%;
    padding: 12px 14px;
    font-size: 0.9rem;
  }

  .chat-footer {
    padding: 16px 20px;
  }

  .message-input {
    padding: 12px 14px;
    font-size: 0.95rem;
  }

  .send-button {
    width: 46px;
    height: 46px;
  }
}

@media (max-width: 480px) {
  .message {
    max-width: 90%;
  }
}

/* ===== Loading Animation ===== */
@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }

  100% {
    background-position: 200% 0;
  }
}

.loading-message {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}