:root {
  --bg: #0f1115;
  --surface: #141821;
  --surface-2: #1a2030;
  --text: #e8ecf1;
  --muted: #a8b3c2;
  --accent: #f59e0b; /* warm amber */
  --accent-2: #ef4444; /* soft red */
  --ring: #fb923c; /* orange ring */
}

body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  margin: 0;
  color: var(--text);
  background: radial-gradient(1200px 600px at -10% -20%, #1f2637 0%, transparent 60%),
              radial-gradient(1200px 600px at 110% -20%, #2a2135 0%, transparent 60%),
              var(--bg);
  min-height: 100vh;
}

.app-header {
  background: linear-gradient(90deg, #1f2937, #2a2135);
  border-bottom: 1px solid #222536;
  padding: 18px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.app-header .header-left {
  display: flex;
  flex-direction: column;
}

.app-header .brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.auth-buttons {
  display: flex;
  gap: 12px;
  margin-left: auto;
}

.auth-buttons a {
  padding: 8px 16px;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 14px;
  text-decoration: none;
  display: inline-block;
}

.welcome{
  align-content: center;
}

#login-btn {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}

#login-btn:hover {
  background: color-mix(in srgb, var(--accent) 15%, transparent);
}

#register-btn {
  background: var(--accent);
  border: 1px solid var(--accent);
  color: #11131a;
}

#register-btn:hover {
  filter: brightness(1.1);
}

.app-header .logo {
  font-size: 25px;
}

.app-header .title {
  font-size: 30px;
  margin: 0;
}

.app-header .brand a {
  text-decoration: none;
  color: var(--text);
  transition: opacity 0.2s ease;
}

.app-header .brand a:hover {
  opacity: 0.8;
}

.app-header .tagline {
  color: var(--muted);
  margin: 6px 0 0 30px;
  font-size: 12px;
}

.container {
  max-width: 720px;
  margin: 22px auto;
  padding: 0 16px;
}

/* Feed */
#messages {
  border: 1px solid #23283b;
  border-radius: 12px;
  padding: 12px;
  height: 380px;
  overflow-y: auto;
  margin-bottom: 14px;
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  box-shadow: inset 0 1px 0 #20263a;
}

.message {
  background: rgba(255,255,255,0.02);
  border: 1px solid #23283b;
  border-radius: 10px;
  padding: 10px 12px;
  margin: 8px 0;
  position: relative;
}

.message::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 10px;
  padding: 1px; /* for the gradient border */
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  pointer-events: none;
}

.message-meta {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 4px;
}

.message-text {
  font-size: 14px;
  white-space: pre-wrap; /* preserve newlines and wrap long lines */
}

form#message-form {
  display: grid;
  gap: 8px;
  width: 100%;
}

.form-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

textarea#message-input {
  padding: 8px;
  border-radius: 10px;
  border: 1px solid #23283b;
  resize: vertical;
  min-height: 84px; 
  color: var(--text);
  background: var(--surface);
  outline: none;
}

textarea#message-input:focus {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--ring) 35%, transparent);
  border-color: var(--ring);
}

button[type="submit"] {
  width: fit-content;
  padding: 8px 14px;
  border: 1px solid var(--accent);
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 85%, black), var(--accent));
  color: #11131a;
  font-weight: 600;
  letter-spacing: .2px;
  border-radius: 999px;
  cursor: pointer;
  transition: transform .06s ease, filter .15s ease;
}

button[type="submit"]:hover {
  filter: brightness(1.15);
}

button[type="submit"]:active {
  transform: translateY(1px);
}

#char-counter {
  color: var(--muted);
}

#char-counter.over-limit {
  color: var(--accent-2);
  font-weight: 600;
}

button[disabled] {
  opacity: .6;
  cursor: not-allowed;
  filter: grayscale(30%);
}

/* Auth Forms */
.auth-form {
  max-width: 400px;
  margin: 40px auto;
  padding: 24px;
  background: var(--surface);
  border-radius: 12px;
  border: 1px solid #23283b;
}

.auth-form h2 {
  margin: 0 0 24px;
  text-align: center;
}

.form-group {
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
}

.form-group input {
  padding: 8px;
  border-radius: 6px;
  border: 1px solid #23283b;
  background: var(--surface-2);
  color: var(--text);
  outline: none;
}

.form-group input:focus {
  border-color: var(--ring);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--ring) 35%, transparent);
}

.auth-form button[type="submit"] {
  width: 100%;
  margin-top: 24px;
  padding: 10px;
}
.error-message {
    color: var(--accent-2);
    font-size: 12px;
    margin-top: 4px;
    min-height: 1.2em;
}
.form-group.error input {
    border-color: var(--accent-2);
}
.form-group input {
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}