.login-body { background: #1a252f; color: white; display: flex; justify-content: center; align-items: center; height: 100vh; margin: 0; padding: 20px; box-sizing: border-box; flex-direction: column; font-family: 'Segoe UI', sans-serif; }
.login-box { background: #2c3e50; padding: 35px 30px; border-radius: 8px; box-shadow: 0 10px 30px rgba(0,0,0,0.5); width: 100%; max-width: 360px; text-align: center; box-sizing: border-box; }
.yandex-btn { display: inline-block; width: 100%; padding: 15px; background: #fc3f1d; color: white; text-decoration: none; border-radius: 4px; font-size: 16px; font-weight: bold; margin-top: 15px; box-sizing: border-box; transition: background 0.3s ease, transform 0.1s ease; }
.yandex-btn:hover { background: #e03517; }
.yandex-btn:active { transform: scale(0.98); }
.login-error { color: #ff7b72; font-size: 13px; font-weight: bold; margin-top: 20px; background: rgba(255, 123, 114, 0.1); padding: 10px; border-radius: 4px; }
.login-footer { margin-top: 30px; font-size: 10px; color: #5c6e80; line-height: 1.4; }