:root {
  --clr-light: #ffffff; /* White */
  --clr-medium: #8ab4c4; /* Medium Blue */
  --clr-dark: #32175a; /* Dark Purple */

  --clr-export: #dfeaee; /* Light Blue */
  --clr-highlight: #eef6f8; /* Lighest Blue */
  --clr-send-hover: #5b3d8b; /* Medium Purple */

  --background: linear-gradient(135deg, var(--clr-light) 0%, var(--clr-medium) 100%);

  --ff-all: "Satoshi", sans-serif;
}

/* MAIN */

body, html {
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
  background: var(--background);
  font-family: var(--ff-all);
  display: flex;
  justify-content: center;
  align-items: center;
}

/* CHAT */

#chat-container {
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  background-color: var(--background);
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  padding: 25px;
  box-sizing: border-box;
  overflow: hidden;
}

#message-input {
  flex-grow: 1;
  padding: 15px;
  border-radius: 20px;
  border: 0.5px solid var(--clr-light);
  font-size: 16px;
  font-family: var(--ff-all);
  background-color: var(--background);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

#message-input::placeholder {
  color: var(--clr-light);
}

#message-input {
  color: var(--clr-light);
}

#message-input:focus {
  outline: none;
  border-color: var(--clr-light);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.thinking-message {
    opacity: 0.7;
    font-style: italic;
}

/* HEADER */

header {
  background-color: var(--background);
  text-align: center;
  margin-bottom: 20px;
  position: relative;
}

header h1 {
  font-size: 2.2em;
  color: var(--clr-dark);
  font-weight: bold;
  font-family: var(--ff-all);
}

.header-flex-container {
  display: flex;
  align-items: center;
  justify-content: left;
  gap: 8px;
  margin-top: -10px;
}

img.header-logo {
  height: 35px;
  width: auto;
}

/* EXPORT BUTTONS */

.export-button {
    background-color: transparent;
    border: none;
    cursor: pointer;
    font-size: 30px;
    color: var(--clr-export);
}

.export-button:hover i {
    color: var(--clr-highlight);
}

.export-button {
    position: absolute;
    top: 25px;
}

#export-chat {
    right: 60px;
}

#export-pdf {
    right: 0px;
}

/* MESSAGES */

#messages-container {
  flex-grow: 1;
  overflow-y: auto;
  background-color: var(--background);
  padding: 15px;
  border-radius: 15px;
  margin-bottom: 20px;
}

#messages {
  display: flex;
  flex-direction: column;
  gap: 15px;
  word-wrap: break-word;
}

.system-message, .user-message {
  word-wrap: break-word;
  overflow-wrap: break-word;
  white-space: normal;
  max-width: 75%;
  padding: 15px;
  border-radius: 15px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  line-height: 1.0;
}

.user-message {
  font-family: var(--ff-all);
  background-color: var(--clr-highlight);
  color: var(--clr-medium);
  align-self: flex-end;
  border-radius: 15px 15px 0 15px;
}

.system-message {
  background-color: var(--clr-highlight);
  color: var(--clr-dark);
  align-self: flex-start;
  border-radius: 15px 15px 15px 0;
}

/* SEND BUTTON */

#send-message {
  padding: 15px;
  border-radius: 20px;
  border: none;
  background-color: var(--clr-dark);
  color: var(--clr-medium);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
  font-family: var(--ff-all);
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

#send-message:hover {
  background-color: var(--clr-send-hover);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3); 
}

/* FOOTER */

.footer-flex-container {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-flex-container label {
  margin-right: 10px;
  cursor: pointer;
}