:root {
  --black: #0a0a0a;
  --black-2: #111111;
  --black-3: #1a1a1a;
  --white: #f5f5f5;
  --white-dim: #a0a0a0;
  --red: #e02020;
  --red-hover: #ff3030;
  --border: #2a2a2a;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Roboto', sans-serif;
  background: var(--black);
  color: var(--white);
  height: 100vh;
  overflow: hidden;
}

.hidden {
  display: none !important;
}

.screen {
  height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---- Login ---- */

#login-screen {
  align-items: center;
  justify-content: center;
}

.login-card {
  background: var(--black-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 40px;
  width: 360px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
  color: var(--red);
}

.logo h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 1px;
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--white-dim);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.field input {
  width: 100%;
  background: var(--black-3);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 14px;
  color: var(--white);
  font-size: 15px;
  font-family: 'Roboto', sans-serif;
  outline: none;
  transition: border-color 0.15s;
}

.field input:focus {
  border-color: var(--red);
}

.field input::placeholder {
  color: #555;
}

.btn-primary {
  width: 100%;
  margin-top: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--red);
  color: var(--white);
  border: none;
  border-radius: 6px;
  padding: 13px;
  font-size: 15px;
  font-weight: 500;
  font-family: 'Roboto', sans-serif;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-primary:hover {
  background: var(--red-hover);
}

.error {
  margin-top: 14px;
  color: var(--red);
  font-size: 14px;
  text-align: center;
}

/* ---- Room ---- */

.room-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--black-2);
  border-bottom: 1px solid var(--border);
}

.room-info {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white-dim);
  font-size: 15px;
}

.room-info #room-name {
  color: var(--white);
  font-weight: 500;
}

.count {
  background: var(--red);
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
  min-width: 22px;
  height: 22px;
  border-radius: 11px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 7px;
}

.btn-ghost {
  display: flex;
  align-items: center;
  gap: 7px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--white-dim);
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 14px;
  font-family: 'Roboto', sans-serif;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-ghost:hover {
  border-color: var(--red);
  color: var(--red);
}

/* ---- Body ---- */

.room-body {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

.participants {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
  max-width: 900px;
  margin: 0 auto;
}

.peer-card {
  background: var(--black-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px 16px;
  text-align: center;
  transition: border-color 0.15s;
}

.peer-card.speaking {
  border-color: var(--red);
  box-shadow: 0 0 0 1px var(--red), 0 0 18px rgba(224, 32, 32, 0.35);
}

.peer-video {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--black);
  border-radius: 4px;
  margin-bottom: 10px;
  display: block;
}

.peer-card.has-video .peer-avatar {
  display: none;
}

.peer-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--black-3);
  border: 2px solid var(--border);
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 700;
  color: var(--white-dim);
  text-transform: uppercase;
}

.peer-card.speaking .peer-avatar {
  border-color: var(--red);
  color: var(--red);
}

.peer-name {
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 4px;
  word-break: break-all;
}

.peer-status {
  font-size: 12px;
  color: var(--white-dim);
}

.peer-card.self .peer-status {
  color: var(--red);
}

/* ---- Controls ---- */

.controls {
  display: flex;
  justify-content: center;
  gap: 12px;
  padding: 18px;
  background: var(--black-2);
  border-top: 1px solid var(--border);
}

.ctrl-btn {
  display: flex;
  align-items: center;
  gap: 9px;
  background: var(--black-3);
  border: 1px solid var(--border);
  color: var(--white);
  border-radius: 8px;
  padding: 13px 24px;
  font-size: 15px;
  font-weight: 500;
  font-family: 'Roboto', sans-serif;
  cursor: pointer;
  transition: all 0.15s;
}

.ctrl-btn:hover {
  border-color: var(--red);
}

.ctrl-btn.active {
  background: var(--red);
  border-color: var(--red);
}

.ctrl-btn.active:hover {
  background: var(--red-hover);
}

/* ---- Hint toast ---- */

.hint {
  position: fixed;
  top: 64px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--black-2);
  border: 1px solid var(--red);
  color: var(--white);
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  max-width: 90vw;
  text-align: center;
}

@media (max-width: 480px) {
  .login-card {
    width: calc(100% - 32px);
    padding: 28px 20px;
  }

  .ctrl-btn span {
    display: none;
  }

  .ctrl-btn {
    padding: 14px;
  }
}